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STL 400A

The STL 400 A is a full range active bi-amplified loudspeaker that offers a 320W + 80W RMS output. Equipped with a 12” neodymium woofer, 1” horn and Class D switching amplifier (ICEpower® by Bang & Olufsen), it is ideal for both indoor and outdoor live music events featuring bands or DJs. The loudspeaker’s new processor-controlled TSSTM keeps the internal amplifier at maximum efficiency, guaranteeing both high sound pressure and audio fidelity. With SR’s Physiocon2TM processor, exceptional performance is assured at all frequencies and volume levels. At the same time, the unit itself remains extremely portable and light. For even greater output and bass response, one or more STW 600 subwoofers can be added. The STL 400 comes with a 40 mm-bored flange on the bottom suitable for a standard speaker floor stand.

Frequency response 50 Hz- 20 kHz
Sensitivity @ 1W/1m 100.0 dBSPL
SPL max (calc.) 127.0 dBSPL
Crossover Electronic - 24dB/octave
2.0 kHz
LF Transducer 12" Woofer
Neodymium magnet circuit
Voice coil diameter 65 mm
HF Transducer Compression Driver 1" Throat
Voice coil diameter 34,4 mm
90°x60° (H x V) horn
Power Handling (Continuous/Peak) 400W/700W
Connection XLR Input
XLR Output
Impedance 10 kΩ @ 1 kHz for XLR line
Input sensitivity XLR Line 0 dBu (0.775 Vrms)
in balance mode
Rigging 4 metric M8 threaded holes provided
Controls Volume, Ground Lift Switch, Physiocon Switch
TSS Processor Inside, Physiocon2 Inside
Box 15 mm Plywood
2 way bass reflex
Stand Support Top hat composed
of welded steel tube ø 36 mm, h=77 mm
Weight kg 22
Dimensions (LxDxH) 375 x 425 x 535 mm