P/N. 10429240



Active direct radiating rear-loaded subwoofer system
1 x 21″ DAS 21LFN neodymium loudspeaker
3200Wpeak – 1600 Wcontinuous
Class D amplifier and digital signal processing (DSP)
Two balanced inputs with stereo filtered output connections
Variable low-pass filter 63 Hz-100 Hz
Top located pole mount socket for TRD-6 optional pole mount
Rear located wheels to ease transport
Top grade Birch cabinet construction
Durable ISO-flex finish


House of worship
Theatres, auditoria and performing arts centers
Live music clubs
Corporate A/V
Live sound touring/Rental services

The EVENT-121A is a direct radiating rear-loaded powered subwoofer system which incorporates a single 21″ neodymium loudspeaker providing “earth-moving” low-frequency reproduction for the EVENT Series line arrays. The combination of direct radiation and rear-loading provides a high output, tight and accurate sub-bass response.

The EVENT-121A employs the new DAS 21LFN loudspeaker which offers impressive features such as a 4″ sandwich split winding voice coil, a powerful FEA optimized neodymium magnet assembly and a FEA optimized suspension system with double silicon spider. The result is a loudspeaker with exceptional sensitivity, high power handling capacity and a quality suspension design capable of withstanding the stress and mechanical fatigue of today´s high-power pro audio systems. An aluminum demodulating ring benefits lower distortion and effective forced ventilation of the voice coil gap provides for a high thermal rating, and reduced power compression.

The EVENT-121A electronics package includes a 3200 Wpeak Class D amplifier and 24-bit high-end DSP for top quality audio reproduction. On the rear panel, controls can be found for gain, polarity and a continually variable low-pass filter which ranges from 63 Hz to 100 Hz. A unique “cardioid preset” button simplifies the use of subs in cardioid configurations, making setup of two to three units a snap without the need for an external DSP. The EVENT-121A is phase response coherent with the EVENT-208A, EVENT-210A and EVENT-212A active tops offering precise alignment. Two balanced inputs with stereo filtered outputs which can be switched to pass-through connections are provided.

Frequency Range (-10 dB)30 Hz – 125 Hz
Maximum Peak SPL at 1 m141 dB
Electronics and Connectors
Nominal Amplifier Power (continuous)1600 W
Nominal Amplifier Power (peak)3200 W
Input TypeBalanced
Input Impeadance20 kohms
Input Sensitivity6.2 V (+18 dBu)
Audio Signal Input Connector2 x Female XLR
Audio Signal Loop Thru Connector2 x Male XLR
AC Output ConnectorpowerCON NAC3FCB
Current Draw 230 V / 115 V3.6 A/7.2 A
Enclosure ConstructionBirch Plywood
Enclosure GeometryRectangular
RiggingM10 Rigging Points
FinishISO-flex Paint
Dimensions ( H x W x D )965 x 740 x 755 mm
38,0 x 29,1 x 29,7 in
Net Weight78,5 kg ( 173,1 lb )
LF Driver21LFN
Carton Dimensions ( H x W x D )1.060 x 790 x 820 mm
41,7 x 31,1 x 32,3 in
Shipping Weight83,5 kg ( 184,1 lb )
Title Format Size
Data Sheet
HT_EVENT121A_00.pdf PDF 1.13 Mb
User Manual
UM_EV212_01_EN.pdf PDF 11.31 Mb
Modeling Data ZIP 55.19 Mb ZIP 206.98 Mb
Software ZIP 48.28 Mb
Line Drawing
CAD_2D_EV121A.dwg DWG 810 Kb
LD_2D_EV121A.png PNG 69 Kb
LD_2D_EV121A.svg SVG 232 Kb
CAT_EVENT_03_EN.pdf PDF 3.1 Mb
CAT_DAS_2020_FULL_LINE_7_2.pdf PDF 13.19 Mb
FM1389BI1911_10103632_IMD.png FUN-2-EV121Protective transport cover for 2 u. EVENT-121A on PL-EV121S, black
FM1329BI1875_10113192_IMD.png PL-EV121SWooden transport dolly for EVENT-121A (max 3 u.), black
FM310BI1708_10104470_IMD.png TRD-6Ring lock pole mount 35 mm x 750 mm for use between satellite and sub system, black
FM1509BI1832_10104471_IMD.png TRD-735 mm ring lock adjustable height (1005 mm – 1485 mm) pole mount for use between satellite and sub systems, black
FM1404BI1726_20208983_IMD.png 21LFNSub-low frequency 21″ speaker, 4″ VCD, neodymium magnet, 1100 W AES, 8 ohm
FM1425BI1616_20406437_IMD.png DSP-EVENT-121ASpare DSP for EVENT-121A
FM1400BI1622_20208533_IMD.png GM-21LFRecone kit for 21LF speaker
FM1412BI1853_30007102_IMD.png M-PRO2
FM923BI1632_30007067_IMD.png MP-EVENT-121AComplete power module for EVENT-121A