\nTo answer this question, it is necessary to differentiate between powered and externally powered systems.
\nFor externally powered systems, there are several types of connection solutions:<\/p>\n
- \n
- The Arco and Ceiling series include push button-type terminals, which means that stripped cable must be inserted directly into the connectors.<\/li>\n
- The Artec-300 and WR series feature screw terminals, so the installer must use stripped cable as well.<\/li>\n
- The Quantum series use Phoenix-type connectors.<\/li>\n
- For installations and portable sound applications, the Action-500, Altea-400, Altea-700, Artec-500, Vantec and series use Neutrik NL4 connectors.<\/li>\n<\/ul>\n
![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das-26-300x124.png\")
<\/p>\nPowered systems use three types of connectors for power supply:<\/p>\n
- \n
- IEC for the Altea-400 and Altea-700 series<\/li>\n
- PowerCon (Blue) for the Action-500, Vantec and Event series<\/li>\n
- PowerCon True1 (black) for the Aero and UX series<\/li>\n<\/ul>\n
![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das29.png\")
<\/strong><\/p>\nIs it possible to rotate the diffusers in DAS Audio installation systems?<\/strong>
\nYes, all the DAS Audio installation systems, such as those from the Artec-300, HQ and WR series, have rotatable diffusers:
\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das-22-300x250.png\")
<\/p>\nWhat do the acronyms CX and DX in DAS Audio systems mean?<\/strong>
\nFor fixed installations, DAS Audio offers two types of weather-resistant finishes.
\nThe CX finish protects the wooden enclosure with polyurea paint and includes stainless steel fittings and mounting hardware. This finish is recommended for applications where the cabinets are partially covered or protected.
\nCX: covered exposure.
\nThe DX finish protects the wooden enclosures by employing a fiberglass exterior and stainless-steel fittings and mounting hardware. This finish also includes a triple protective coat behind the grille of the systems, including a water-repellent fabric. This finish is recommended for systems fully exposed to extreme environments.
\nDX: direct exposure.<\/p>\n\u00bfWhat is the IP rating of DAS Audio systems?<\/strong>
\nLive sound systems, such as the powered Event\/Aero\/UX, are IP-43 certified thanks to the integrated rain cover that protects the amplifiers.
\nFixed installation systems, such as the HQ and WR series, are generally IP54 certified.
\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2023\/03\/das11.jpg\")
<\/p>\n
\nCan the portable sound reinforcement systems from the Action-500, Altea-400, Altea-700, and Vantec series be reset to factory settings?<\/strong>
\nYes, all systems can be restored to factory settings.
\nThe procedure is the same for all series. Navigate up to the options sub-menu and select the reset device option:<\/p>\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das12.png\")
<\/p>\nIs it possible to update the firmware of systems that include a wireless connection?<\/strong>
\nYes, all the series that incorporate this technology (Altea-700 and Vantec) can update their firmware wirelessly using the DASlink\u2122 application. See user manual for more information.<\/p>\nCan DASlink Group Manager\u2122 send audio wirelessly?<\/strong>
\nNo. DASlink GM\u2122 is designed to control groups of systems from the Altea-700 and Vantec series. The maximum number of systems that can be controlled ranges from 4 to 16 depending on the tablet or smartphone version the user holds.
\nThis application cannot update the firmware of the systems.
\nSee the series user manual and the DASlink GM\u2122 tutorials for more information.<\/p>\nWhen do you recommend using the DASlink\u2122 wireless application?<\/strong>
\nIn locations with no Wi-Fi connection, DASlink\u2122 can be used for music streaming and for controlling a small number of systems from the Altea-700 or Vantec series.
\nPlease note that Wi-Fi networks can cause interference with audio streaming.
\nDASlink\u2122 will be necessary to update the firmware of the Altea-700 and Vantec systems.
\nSee the series user manual and the DASlink\u2122 tutorials for more information.<\/p>\nHow many curves or presets can be loaded onto the Altea-400, Altea-700, and Vantec systems?<\/strong>
\nThere are 5 types of pre-recorded frequency response curves: Live, Dance, Bass Boost, Monitor and Vocals. The Live Mode curve appears by default.
\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2023\/03\/das13.jpg\")
<\/p>\nThe Vantec-20A models do not feature these 5 presets. However, there is one parameter that can be modified, known as Number of Units, which depends on the number of cabinets in the array. Blue Number of Units: Blue =1, Green =2, Red =3
![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2023\/03\/das-23.jpg\")
<\/p>\nHow many curves or presets can be loaded onto the Action-500?<\/strong>
\nYou can load 3 curves: Live, Dance and Monitor.
\nThe Live curve is loaded by default onto the systems, except for the Action-M512A model which includes the Monitor curve.<\/p>\nThe display of the Action-M512A, is it off during operation? <\/strong>
\nYes, the display is set in Monitor mode. The screen automatically shuts down when the encoder is not in use, so as not to disturb the audience.<\/p>\nDo the systems from the Altea-400, Altea-700, Vantec, and Action-500 series have configurable delays?<\/strong>
\nYes, from 0 to 9.9 meters.<\/p>\nWhich high-pass filter should I choose when combining tops and subs from the Altea-400\/700, Action-500, and Vantec series?<\/strong>
\nIn the same way that it is possible to select the preset (frequency response curve) for the tops, you can also select the high-pass filter (HPF) when using SUBS+TOPS together.
\nFor the Altea-412A, Altea-415A, Altea-712A and Altea-715A models, select the HPF option: At-18A<\/p>\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das14-150x150.png\")
<\/p>\nFor the Altea-718A model, select the low pass filter (LPF) option: AlTop
\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das15-150x150.png\")
<\/p>\nFor Vantec-12A, Vantec-15A, Vantec-215A and Vantec-20A, select the HPF option: V18A
\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das16-150x150.png\")
<\/p>\nFor the subwoofers Vantec-18A, Vantec-218A, Vantec-118A, set the LPF control to 100Hz (number 9 in the figure):
\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das17-150x150.png\")
<\/p>\nFor Vantec-20A, select HPF: V118A<\/p>\n
What is the number of units parameter for?<\/strong>
\nIn a powered line array or curved source system<\/u>, it is used to compensate the excess of energy in the mid-low frequency range produced when hanging the systems one under the other. The graphic shows the curves for different values entered in the \u201cnumber of units\u201d parameter for the Aero-20A. The pink curve shows the number of units = 1.<\/p>\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2023\/03\/das18.jpg\")
\nThis parameter can also be found in the Event-208A, Event-210A, Event-212A, Vantec-20A, Aero-20A and Aero-40A models.
\nVery important: For this parameter, use the same \u201cnumber of units\u201d value in all the cabinets of your system. For example, if you have an array with 6 x Event-210A per side, the same value of the \u201cnumber of units\u201d parameter must be used for each and every system.
\nFor the Event-208A, Event-210A and Event-212A models, the parameter \u201cnumber of units\u201d can be adjusted on the rear panel of the amplifier.
\nFor the Vantec-20A model, it can be done via DASlink GM or hardware.
\nFor the Aero-20A\/40A systems, via DASnet or hardware.
\nSee the user manuals for more information.<\/p>\nHow do I set up a cardioid subwoofer array?<\/strong>
\nWith the powered Event-218A, Event-121A, UX-218A, UX-221A, UX-30A and LX-218CA systems, just by positioning two\/ three subwoofers with ONE of them facing backwards in the same stack. The back-facing subwoofer must have the cardioid preset button on:<\/p>\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das30.png\")
<\/p>\nWhen the parameters of a powered system are modified, are they saved after the amplifier is off? <\/strong>
\nYes, any change of presets in the Altea-400, Altea-700, Action-500, or Vantec powered series is stored in the internal memory of the systems.
\nSimilarly, in the Aero and UX series any changes or parameters entered via the rear panel of the amplifier or via DASnet is stored in the internal memory.[\/vc_column_text][vc_column_text][\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Power Handling” tab_id=”power-handling”][vc_column_text]What is RMS power?<\/strong>
\n\u201cRMS power\u201d is a misnomer derived from the usual method of calculating speaker power, which is to divide the RMS voltage squared by the impedance (V\u00b2\/Z). RMS is the acronym for root-mean-square, which relates to the mathematical equation that obtains the average of the modulus of an alternating signal (that is, with positive and negative cycles). The correct expression for \u201cRMS power\u201d is average power. The ratio between RMS and peak values is different for each signal.<\/p>\nWhat is average power?<\/strong>
\nIt is the result of deriving power from an RMS value of voltage or current. It is the correct way of writing \u201cRMS power\u201d.<\/p>\nWhat is programme power?<\/strong>
\nProgramme power is an archaic term dating back to when power tests used sine waves. Many manufacturers, including DAS Audio, apply a convention whereby programme power is twice the average (\u201cRMS\u201d) power, although other manufacturers may use different power ratios, which may even vary from product to product. Nowadays the term \u201cprogramme power\u201d has no specific meaning, although it might be used as a power amplifier recommendation for controlled applications.<\/p>\nWhat is peak power?<\/strong>
\nPeak power is the power that corresponds to the signal peaks that the amplifier feeds the speaker during a power test. Typical test signals have peaks that carry four times the average signal power, which is why peak power is normally four times the average (\u201cRMS\u201d) power.<\/p>\nWhat is AES power?<\/strong>
\nThe AES (Audio Engineering Society) publishes a standard for the measurement of loudspeaker component parameters. Generally speaking, this standard calls for a 2-hour test using pink noise with specified dynamics and with a frequency content that matches the component`s frequency range. Although it is a standard for components, it is often extended to the different ways on an active system. The rating always derives from RMS voltage or current measurements, therefore the rating corresponds to average (\u201cRMS\u201d) power.<\/p>\nWhat is IEC power?<\/strong>
\nThe IEC (International Electro technical Commission) publishes standards for loudspeaker measurement. We can speak of IEC power by following those standards. Specifically, IEC 268-1 defines a signal with specified dynamics and a frequency content that tries to resemble that of real music. The rating always derives from RMS voltage or current measurements, therefore the rating corresponds to average (\u201cRMS\u201d) power. DAS Audio utilises IEC shaped noise for enclosure power testing.[\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Amplification” tab_id=”amplification”][vc_column_text]Can I run the amplifier with 2 ohm loads?<\/strong>
\nVirtually all professional amplifiers will accept loads down to four ohms safely in stereo mode. Many are rated for 2 ohm loads but often will run into overheating protection when used with 2 ohm loads, particularly in high ambient temperature and high output power applications. Check the user`s manual of you amplifier to find out the lower impedance it will take. Never use a total impedance load that is lower that the lowest impedance that the amplifier will take (for instance, hooking up too many enclosures in parallel).<\/p>\nShould I enable the amplifier\u00b4s high-pass (sub-sonic) filter?<\/strong>
\nIt is good practice to use a high-pass filter for the lowest frequency component in your system (i.e. a full-range enclosure; or a subwoofer if using subwoofer reinforcement). If your electronic crossover has a high-pass filter, use it, and disable the amplifier\u00b4s. Use the amplifier\u00b4s high-pass filter only if there is no other filter of this type anywhere else in your system chain.<\/p>\nBeyond their operating ranges, speakers produce little sound. Instead, they radiate large amounts of heat. In addition, frequencies below a speaker\u00b4s operating band will generate a lot of cone movement. By using a high-pass filter, we can put the low frequency energy that would otherwise be wasted into usable amplifier power for the speaker\u00b4s operating band. We also prevent mechanical damage from excessive cone movement. Thus, high-pass filtering maximises acoustic power and makes systems more reliable.<\/p>\n
We recommend enabling a high-pass filter that is equal or higher than the system\u00b4s lower usable frequency. For instance, for an Vantec-215 used as a full-range box, set the high-pass frequency no lower than 40 Hz. No lower than 60 Hz for a DAS Factor-8.<\/p>\n
DAS signal processors provide system specific high-pass filtering. DAS IA series amplifiers also provide sub-sonic filtering with useful cut-off frequencies.<\/p>\n
What amplifier should I use with transformer loudspeakers?<\/strong>
\nThere are specific amplifiers for 70\/100 V lines, sometimes referred to as constant voltage. For applications where little power is required, these amplifiers are appropriate. As the power requirements for the system increase, conventional amplifiers are often used. For instance, a conventional amplifier delivering 1200W per channel at 4 ohm can be considered a stereo 70 V amplifier. Likewise, an amplifier delivering 600 W per channel at 4 ohm can be considered a monophonic 100 V amplifier in bridge mode. Similarly, an amplifier delivering 300 W per channel at 4 ohm can be considered a monophonic 70 V amplifier in bridge mode.<\/p>\nTo calculate the required amplifier power for a 70 or 100 V line, simply sum the power for the amplifiers connected to an amplifier channel. Example: if we want a 100 V line with 50 DAS Factor-8T enclosures (with built-in multi-tap transformer to select different power levels for 50, 70 and 100 volts) such that 25 of them use the 30 W tap and 25 of them use the 15 W tap, we would need an amplifier delivering a minimum of 25\u00d730+25\u00d715=1125 W. In this case, assuming all speakers share the same signal (zone), it may be worthwhile, and probably more economic, to use a conventional 500 W output per channel at 4 ohm amplifier in bridge mode, such as a DAS IA-1002.<\/p>\n
What is the damping factor?<\/strong>
\nDamping factor is related to amplifier output impedance, and can be explained as the ability of the amplifier to control the movement of a loudspeakers` voice coil. For a given speaker load, the damping factor is, in practice, given mostly by the cable impedance, so that one should not place too much importance on this amplifier parameter. It is also important to note that damping is directly related to the speaker load, so that using an 8 ohm load will yield twice the damping factor compared to a 4 ohm load. To maintain a high damping factor, always use cable of appropriate thickness (gauge).<\/p>\nWhat cable should I use?<\/strong>
\nTo ensure quality sound (high damping factor) and minimum power loss, the speaker cable needs to have a large enough cross section depending on the cable length, number of speakers per channel and speaker impedance. The longer the cable and the more speakers, the thicker the cable has to be. The lower the impedance of each speaker, the thicker the cable has to be. The most important feature for a cable is its wire area; you can discard cables with magical properties and astronomical price.<\/p>\nAmplifier user`s manuals often have tables to aid the selection of wire gauge for different cables lengths and speaker impedances. The DAS IA Series amplifiers` user`s manual provides tables of this type.<\/p>\n
In what voltage range do DAS Audio\u00b4s powered systems work?<\/strong>
\nIn terms of design, ALL powered DAS Audio systems can operate successfully down to voltages of 180V for nominal power of 230V, and 90V for nominal power of 115V.
\nThe standard only requires a 10% variation from the nominal voltage, but DAS Audio extends this margin up to 20% for the lower limit.<\/p>\nDoes this mean that the systems are not affected by voltage drops and peaks?<\/strong>
\nIt means that the systems can run at full power within the following voltage ranges:
\nFor 230 V: Min 180V ; Max 260V
\nFor 115V: Min 90V; Max 130V[\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Acoustics” tab_id=”acoustics”][vc_column_text]What is a third octave?<\/strong>
\nA third octave is more like a \u201cthird of an octave\u201d, i.e. an octave divided by three.<\/p>\nAn octave is a frequency band that spans within two frequencies with a ratio of 2:1. For instance, the 1000 Hz octave band spans from 707 to 1414 Hz. Adjacent octave bands are also spaced by a ratio of 2:1, such as the 500 and 1000 octave bands. The octave band centre frequencies have been standardised by ISO (International Organization for Standardization) to rounded figures as follows:
\n63:125:250:500:1k:2k::4k:8k:16k Hz<\/p>\nA third of an octave is a frequency band that is three times smaller than an octave band, so that an octave band logically comprises three third octave bands. Thus, the 1000 Hz third octave has a bandwidth of 891-1122 Hz. And the 1000 Hz octave band encompasses the 800, 1000 and 1250 Hz third octave bands. Third octave bands are often used in audio because they relate to the way human hearing (and mammals` in general) works. The most used form of pro-audio equaliser is the 1\/3rd octave band \u201cgraphic\u201d equaliser, the term \u201cgraphic\u201d deriving from the fact that glancing at the fader positions we can (arguably) get an idea of the resulting EQ. Analysers that measure frequency content in 1\/3rd octave bands are often referred to as RTAs. The 31 third octave audio band centre frequencies have been standarised by ISO to rounded figures as follows:<\/p>\n
20:25:31.5:40:50:63:80:100:125:160:200:250:315:400:500:630:800:1k:1k25:1k6:2k:2k5:3k15:4k:5k:6k:8k:
\n10:12k5:16k:20k Hz<\/p>\nFor the musically inclined, a third octave is equivalent to four semitones.<\/p>\n
What long throw systems for installations are available in the DAS Audio catalogue?<\/strong>
\nPoint Source Systems: The externally powered HQ series which feature 2-way passive or bi-amplified systems for sports facilities, such as football stadiums, arenas, etc.
\nLine Array Systems: There are two externally powered line array models. The Artec-320 and the WR-320 systems, ideal for indoor and outdoor applications, respectively.
\nPowered Line Array Systems: The Event and Aero series are available as long throw solutions for installations with powered systems.<\/p>\nWhat is efficiency?<\/strong>
\n<\/strong>Efficiency is the ratio between the acoustic power output and the electrical power input to a loudspeaker. Power not converted into sound ends up as heat. Loudspeakers are very inefficient devices that put out more heat than sound.<\/p>\nWhat is sensitivity?<\/strong>
\nSensitivity is the sound pressure level (SPL) which is measured at a distance of 1 metre in front (on-axis) of a loudspeaker which is fed 1 watt of electrical power. If the measurement uses a different distance or power, the result is scaled so that it refers to the standard 1W\/1m.<\/p>\nWhat is this excursion thing then?<\/strong>
\nOn a cone or diaphragm, excursion is the movement outward and back or from the voice coil rest position. It is inversely proportional to frequency, so that low frequencies generate more movement than high frequencies.<\/p>\nOver-excursion takes place when excessive movement causes scratching or deforming of the voice coil, or even fracture when the coil support \u201cbottoms-out\u201d and hits the speaker`s bottom plate. To prevent damage, avoid equaliser gain on frequency ranges below a speaker`s operating range (such as 20 Hz on a SUB218, or 40 Hz on a Factor -5), use a high-pass filter and be careful when utilizing large power amplifiers.<\/p>\n
What is the directivity index?<\/strong>
\nThe directivity index (Di) is an expression in decibels of the directionality of a sound source. Narrow coverage systems have a high directivity index, whereas wide coverage systems have a low one. Di is the decibel form of directivity Q factor, so both are related as Di = 10*log(Q).<\/p>\nWhat do we mean by long \/ short throw?<\/strong>
\nA long throw system is one that has high sensitivity and narrow directivity (high Di), whereas a short throw system is one with lower sensitivity and a wider coverage (low Di). These are informal terms without precise definitions.<\/p>\nWhat is the difference between direct radiation and horn loading?<\/strong>
\nWith direct radiation, a vibratory element (such as a cone loudspeaker) radiates directly into the air.<\/p>\nHorn loading takes place when the loudspeaker couples with air through a horn. In doing that greater efficiency is achieved, that is, more sound and less heat. We also get more directionality. The theoretical size for a horn is inversely proportional to frequency. That is why, for bass bins, the horn of which would be impracticably large, the horn has to be \u201cfolded\u201d inside the box, thus referred to as a \u201cfolded horn\u201d box.<\/p>\n
What is horn EQ?<\/strong>
\nA compression driver and horn combination exhibits inherent high frequency roll-off. This is compensated at the passive filter network in passive systems, while active ones (with no passive network elements) take care of the correction at the electronic crossover.<\/p>\nWhat is sound?<\/strong>
\nIn physics, sound (from Latin son\u012dtus) is any phenomenon that involves the propagation of mechanical waves (audible or not), usually through a fluid or other elastic medium, generated by the vibratory movement of a body. Without an elastic medium there would be no sound since waves do not propagate in a vacuum.<\/p>\nWhat is the sensitivity (SPL) of a system and how is it determined?<\/strong>
\nIt is the sound pressure level (SPL) measured at a given distance, conventionally 1 m in front of a speaker (on axis) with an input power of 1W. If the measurement is done at a different distance or power, the result is scaled to 1W\/1m:
\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das1-1024x308.png\")
<\/p>\nWhat is the Peak or Maximum Sensitivity (SPLmax) of a system and how is it determined?<\/strong>
\nIt is the sound pressure level (SPL) measured at a given distance, conventionally 1 m in front of a speaker (on axis) at the maximum power handling capability of the system. It is traditionally calculated using the Peak Power rating, applying the following formula:
\nSPLpeak = SPL(1W\/1m)+10*log(Peak Power)
\nFor example, the HQ-212.95 system has a sensitivity of 105dB. The peak power rating of the system is 3200W. The calculation is as follows:
\nSPLpeak = 105+10*log(3200)=140Db<\/p>\nWhat is frequency range and how is it determined?<\/strong>
\nGiven a frequency response measured at 1W\/1m, the frequency range is determined by the points where the SPL drops 10dB below the average:
\nFor example, for Aero-40A, the limits are 60Hz – 20kHz
\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das2-1024x327.png\")
<\/p>\nWhat is the target frequency response curve for a system?<\/strong>
\nIt depends greatly on the application and the type of system. Note that a public address system for voice evacuation announcements is different from a club system, a concert, or a cinema system. For instance:<\/p>\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das-21-1024x343.png\")
<\/p>\nDAS Audio designs systems, both powered and externally powered with DSP, so the user can benefit from a frequency response curve as flat as possible that can be used as a starting point for a wide range of applications.<\/p>\n
What types of acoustic systems are there?<\/strong>
\nThere are many ways of categorizing acoustic systems.<\/p>\n- \n
- One option is by grouping them under one-way, two-way, or three-way systems. Hence, a subwoofer is a one-way system, while a 12\u201d and a driver is considered a two-way system.<\/li>\n<\/ul>\n
Two- or three-way systems can fall under the passive or active category, depending on whether the crossover point between the signal paths is done with a passive filter included in the system or is done with an external digital processor.<\/p>\n
- \n
- Another category can be set depending on whether the systems are powered or externally powered.<\/li>\n
- One more category can be established according to the type of horn (diffuser) that the systems incorporate:\n
- \n
- Point Source Systems: the most conventional in the market. They are normally two-way and include a diffuser with Horizontal and Vertical coverage. For example, the Vantec-12A is a two-way powered system in point source format with 90\u00ba x 50\u00ba (H x V) coverage.<\/li>\n
- Line Array Systems: are characterized by the formation of vertical arrays hanging the units one below the other following acoustic criteria. Arrays employ diffusers and waveguides with fixed horizontal coverage, but the vertical coverage varies (decreases) with frequency. For example, the Aero-20A is a two-way powered line array system with 90\u00ba x V\u00ba coverage, where V is variable depending on frequency.<\/li>\n
- Curved Source Systems: are characterized by their capability to form vertical arrays with a fixed vertical coverage per cabinet and independent of frequency. They are hybrid systems halfway between point source and line array systems. For example, the Vantec-20A system is a two-way powered curved source system with 90\u00ba x 15\u00ba coverage (H x V)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
What is the coverage of a system and how is it defined?<\/strong>
\nSystem coverage is determined by measuring the system\u00b4s frequency response at various positions off the horizontal and vertical axis. When the frequency response has dropped 6dB off-axis, we obtain the Horizontal or Vertical coverage angle of the system. Coverage angles are expressed in sexagesimal degrees. The following would be the basic measurement points to determine the H x V coverage of a two-way system:<\/p>\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2023\/03\/das7.jpg\")
The result is typically shown in polar plots or sound pressure graphs (a two-way system of 60\u00ba x 40\u00ba coverage is shown):![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2023\/03\/das8.jpg\")
<\/p>\nWhat is the vertical coverage of a line array system?<\/strong>
\nA line array system does not have a fixed vertical coverage. In terms of a single cabinet, the vertical coverage varies with frequency, so it is common to find in catalogs or specification sheets the coverage of a line array (H x V) expressed as follows:
\n90\u00ba x splay dependent
\nAsking about the vertical coverage of a line array cabinet is a common question in the professional audio industry. The answer to that is not a fixed and defined number since that coverage varies with frequency. As a matter of fact, the answer is shown in a graph like this one bellow:<\/p>\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2023\/03\/das9.jpg\")
Sound pressure level map on the vertical plane of an Artec-320 system. Notice that from 1kHz the system vertical coverage narrows with frequency.
\nOn the other hand, we can talk about vertical coverage when several cabinets are hung at certain angles forming a complete cluster.<\/p>\nWhat is a cardioid subwoofer setup? <\/strong>
\nSubwoofers have virtually an omnidirectional radiation pattern. That is, there is the same energy in front and behind the subwoofer.
\nCardioid means that power only radiates at the front of the subwoofer.
\nThis can be achieved by combining the DAS Audio powered subwoofers.
\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das-24.png\")
[\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Impedance” tab_id=”impedance”][vc_column_text]How do I calculate the impedance that results from connecting several loudspeakers?<\/strong>
\nThe total impedance for a number of speakers in parallel is equal to the impedance of one divided by the number of speakers. For instance, two 8-ohm speakers in parallel total 4 ohms (8 ohms divided by 2 speakers equal 4).<\/p>\nIf the speakers are in series, the total impedance is the sum of the individual impedances of each speaker. For instance, two 8-ohm speakers in series total 16 ohms (8 ohms plus 8 ohms equal 16). In pro audio, series connections are rarely used outside low power applications such as background music, paging, or surround sound.<\/p>\n
Why is the impedance that I measure with a multimeter different from the system`s nominal impedance?<\/strong>
\nThe multimeter looks at resistance, not impedance. Impedance is the opposition to the passage of alternating current and varies with frequency. Resistance is the opposition to the passage of direct current. Resistance is normally lower than nominal impedance. For instance, an 8-ohm nominal impedance cone speaker would typically have a (DC) resistance around 6 ohm. See any DAS spec sheet for an impedance curve. Dedicated impedance meters for audio use exist; they typically use a sinewave generator to measure impedance at 1 kHz, so you need to look at the speaker`s impedance chart to see what value you should expect at that frequency.<\/p>\nWhat is the impedance of a system and how is it determined?<\/strong>
\nImpedance is defined as the opposition to the flow of alternating current. In a system, the impedance varies with frequency, so manufacturers publish “impedance curves”. Impedance curves are measured using specific laboratory equipment and, typically, a sinusoidal sweep. An impedance curve of a passive two-way system may look like this:
\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das10-1024x278.png\")
<\/p>\nImpedance is expressed in ohms.
\nThe standard nominal impedance for externally powered systems is 8 ohms or, in some cases, 4 ohms.[\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Audio Electronics” tab_id=”audio-electronics”][vc_column_text]What is a balanced line?<\/strong>
\nThere are two basic ways to transport an audio signal with microphone or line level:<\/p>\nUn-balanced line: Utilizing a two-conductor cable, it transports the signal as the voltage between them. Electro-magnetic interference can sum to the signal as undesired noise. Connectors that carry un-balanced signals have two pins, such as RCA (Phono) and \u00bc\u201d (6.35 mm, often referred to as jack) mono. 3-pin connector such as XLR (Cannon) may also carry un-balanced signals if one of the pins is unused.<\/p>\n
Balanced line: Utilizing a three-conductor cable, one of them acts as a shield against electro-magnetic noise and is the ground conductor. The other two have the same voltage with respect to the ground conductor but with opposite signs. The noise that cannot be rejected by the shield affects both signal conductors in the same way. At the device\u2019s input the two signals get summed with opposite sign, so that noise is cancelled out while the programme signal doubles in level. Most professional audio devices use balanced inputs and outputs. Connectors that can carry balanced signal have three pins, such as XLR (Cannon) and \u00bc\u201d (6.35 mm) stereo.<\/p>\n
What signal connectors do DAS Audio\u00b4s powered systems use?<\/strong>
\nAll powered DAS Audio systems feature analogue audio input(s) using XLR connectors:
\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/ampli1.png\")
<\/p>\nThe Aero and UX Series systems feature audio input XLR connectors plus additional Ethercon connectors (marked as DASnet in\/out) to feed analogue audio and monitoring data (DASnet) via the same cable:
\n![\"FAQs\"](\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/ampli2.png\")
\nConsequently, in Aero and UX systems, if the Ethercon connector is in use, there is NO need to feed audio via the XLR.<\/p>\n[\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Customer Support Request” tab_id=”1544529936443-79876178-6f49″][vc_column_text]Thank you for your confidence in our products.<\/p>\n
If you are an end user of DAS products you should contact your local distributor or dealer. Contact information for international distributors may be found in the\u00a0Where to buy DAS<\/a>\u00a0link.<\/p>\n
In other cases, complete the\u00a0Customer Support Form<\/a>\u00a0and send it using the \u201cSend\u201d at the bottom of the web form.<\/p>\n
Please remember the following:<\/p>\n
-Before sending any materials to DAS Audio you must obtain an RMA (Returns Materials Authorization) number. Fill in the\u00a0Customer Support Form<\/a>\u00a0and you will be contacted with instructions for obtaining service.<\/p>\n
-The customer is responsible for transporting the product for repair or arranging for its transportation and for payment of any initial shipping charges.\u00a0Products received with \u201cfreight due\u201d will not be accepted.<\/strong><\/p>\n
-Send your DAS product with adequate protection for shipping. A suitable carton with packing materials sturdy enough to withstand shock or puncture is required. If you need one, request it from DAS when you call or email your RMA form.\u00a0DAS will not be held responsible for damage done to unsuitably packed products.<\/strong><\/p>\n
-The RMA number should be clearly marked on the outside of the packaging.[\/vc_column_text][vc_row_inner][vc_column_inner width=”1\/2″][vc_column_text]Customer Support Form<\/a>[\/vc_column_text][\/vc_column_inner][vc_column_inner width=”1\/2″][vc_column_text]Factory After Sales Service Policy<\/a>[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_tta_section][\/vc_tta_accordion][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"
[vc_row disable_element=”yes” el_class=”slide_soporte”][vc_column][rev_slider_vc alias=”soporte”][\/vc_column][\/vc_row][vc_row full_width=”stretch_row” css=”.vc_custom_1541498798535{background-color: #f1f1f2 !important;}” el_id=”contenido_soporte”][vc_column][vc_row_inner el_class=”intro_soporte”][vc_column_inner width=”5\/12″][vc_column_text] FAQ’S Do you have any questions about the repair procedures of DAS products or audio in general? Here you\u00b4ll find answers to those question.[\/vc_column_text][\/vc_column_inner][vc_column_inner width=”7\/12″][vc_single_image image=”642″ img_size=”full” alignment=”right”][\/vc_column_inner][\/vc_row_inner][vc_tta_accordion style=”outline” shape=”square” color=”white” c_icon=”” active_section=”-1″ collapsible_all=”true” el_class=”acordeon_faq”][vc_tta_section title=”Audio and systems” tab_id=”1590065251863-77357b3e-1ef1″][vc_column_text]What types of connections can be […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":198,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-629","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"\n
FAQ's - DAS Audio<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dasaudio.com\/en\/support\/faqs\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"FAQ's - DAS Audio\" \/>\n<meta property=\"og:description\" content=\"[vc_row disable_element=”yes” el_class=”slide_soporte”][vc_column][rev_slider_vc alias=”soporte”][\/vc_column][\/vc_row][vc_row full_width=”stretch_row” css=”.vc_custom_1541498798535{background-color: #f1f1f2 !important;}” el_id=”contenido_soporte”][vc_column][vc_row_inner el_class=”intro_soporte”][vc_column_inner width=”5\/12″][vc_column_text] FAQ’S Do you have any questions about the repair procedures of DAS products or audio in general? Here you\u00b4ll find answers to those question.[\/vc_column_text][\/vc_column_inner][vc_column_inner width=”7\/12″][vc_single_image image=”642″ img_size=”full” alignment=”right”][\/vc_column_inner][\/vc_row_inner][vc_tta_accordion style=”outline” shape=”square” color=”white” c_icon=”” active_section=”-1″ collapsible_all=”true” el_class=”acordeon_faq”][vc_tta_section title=”Audio and systems” tab_id=”1590065251863-77357b3e-1ef1″][vc_column_text]What types of connections can be […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dasaudio.com\/en\/support\/faqs\/\" \/>\n<meta property=\"og:site_name\" content=\"DAS Audio\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/pages\/DAS-Audio\/109142086128\" \/>\n<meta property=\"article:modified_time\" content=\"2023-03-22T11:31:03+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das-26.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1049\" \/>\n\t<meta property=\"og:image:height\" content=\"433\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@dasaudio\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"28 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.dasaudio.com\\\/en\\\/support\\\/faqs\\\/\",\"url\":\"https:\\\/\\\/www.dasaudio.com\\\/en\\\/support\\\/faqs\\\/\",\"name\":\"FAQ's - DAS Audio\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.dasaudio.com\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.dasaudio.com\\\/en\\\/support\\\/faqs\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.dasaudio.com\\\/en\\\/support\\\/faqs\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.dasaudio.com\\\/wp-content\\\/uploads\\\/2020\\\/05\\\/das-26-300x124.png\",\"datePublished\":\"2018-11-06T08:54:39+00:00\",\"dateModified\":\"2023-03-22T11:31:03+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.dasaudio.com\\\/en\\\/support\\\/faqs\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.dasaudio.com\\\/en\\\/support\\\/faqs\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.dasaudio.com\\\/en\\\/support\\\/faqs\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.dasaudio.com\\\/wp-content\\\/uploads\\\/2020\\\/05\\\/das-26-300x124.png\",\"contentUrl\":\"https:\\\/\\\/www.dasaudio.com\\\/wp-content\\\/uploads\\\/2020\\\/05\\\/das-26-300x124.png\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.dasaudio.com\\\/en\\\/support\\\/faqs\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.dasaudio.com\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Support\",\"item\":\"https:\\\/\\\/www.dasaudio.com\\\/en\\\/support\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"FAQ’s\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.dasaudio.com\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/www.dasaudio.com\\\/en\\\/\",\"name\":\"DAS Audio\",\"description\":\"D.A.S. 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Here you\u00b4ll find answers to those question.[\/vc_column_text][\/vc_column_inner][vc_column_inner width=”7\/12″][vc_single_image image=”642″ img_size=”full” alignment=”right”][\/vc_column_inner][\/vc_row_inner][vc_tta_accordion style=”outline” shape=”square” color=”white” c_icon=”” active_section=”-1″ collapsible_all=”true” el_class=”acordeon_faq”][vc_tta_section title=”Audio and systems” tab_id=”1590065251863-77357b3e-1ef1″][vc_column_text]What types of connections can be […]","og_url":"https:\/\/www.dasaudio.com\/en\/support\/faqs\/","og_site_name":"DAS Audio","article_publisher":"https:\/\/www.facebook.com\/pages\/DAS-Audio\/109142086128","article_modified_time":"2023-03-22T11:31:03+00:00","og_image":[{"width":1049,"height":433,"url":"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das-26.png","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_site":"@dasaudio","twitter_misc":{"Est. reading time":"28 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.dasaudio.com\/en\/support\/faqs\/","url":"https:\/\/www.dasaudio.com\/en\/support\/faqs\/","name":"FAQ's - DAS Audio","isPartOf":{"@id":"https:\/\/www.dasaudio.com\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.dasaudio.com\/en\/support\/faqs\/#primaryimage"},"image":{"@id":"https:\/\/www.dasaudio.com\/en\/support\/faqs\/#primaryimage"},"thumbnailUrl":"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das-26-300x124.png","datePublished":"2018-11-06T08:54:39+00:00","dateModified":"2023-03-22T11:31:03+00:00","breadcrumb":{"@id":"https:\/\/www.dasaudio.com\/en\/support\/faqs\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.dasaudio.com\/en\/support\/faqs\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.dasaudio.com\/en\/support\/faqs\/#primaryimage","url":"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das-26-300x124.png","contentUrl":"https:\/\/www.dasaudio.com\/wp-content\/uploads\/2020\/05\/das-26-300x124.png"},{"@type":"BreadcrumbList","@id":"https:\/\/www.dasaudio.com\/en\/support\/faqs\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.dasaudio.com\/en\/"},{"@type":"ListItem","position":2,"name":"Support","item":"https:\/\/www.dasaudio.com\/en\/support\/"},{"@type":"ListItem","position":3,"name":"FAQ’s"}]},{"@type":"WebSite","@id":"https:\/\/www.dasaudio.com\/en\/#website","url":"https:\/\/www.dasaudio.com\/en\/","name":"DAS Audio","description":"D.A.S. 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- One option is by grouping them under one-way, two-way, or three-way systems. Hence, a subwoofer is a one-way system, while a 12\u201d and a driver is considered a two-way system.<\/li>\n<\/ul>\n