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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 m 141 dB
Electronics and Connectors
Nominal Amplifier Power (continuous) 1600 W
Nominal Amplifier Power (peak) 3200 W
Input Type Balanced
Input Impeadance 20 kohms
Input Sensitivity 6.2 V (+18 dBu)
Audio Signal Input Connector 2 x Female XLR
Audio Signal Loop Thru Connector 2 x Male XLR
AC Output Connector powerCON NAC3FCB
Current Draw 230 V / 115 V 3.6 A/7.2 A
Enclosure Construction Birch Plywood
Enclosure Geometry Rectangular
Rigging M10 Rigging Points
Finish ISO-flex Paint
Color Black
Dimensions ( H x W x D ) 965 x 740 x 755 mm
38,0 x 29,1 x 29,7 in
Net Weight 78,5 kg ( 173,1 lb )
LF Driver 21LFN
Carton Dimensions ( H x W x D ) 1.060 x 790 x 820 mm
41,7 x 31,1 x 32,3 in
Shipping Weight 83,5 kg ( 184,1 lb )

Synchrony Financial

Progressive Leasing

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