AMX AR-45 4-Pairs Stereo Speaker Selector Box w/ Impedance Protection #2158 - DEMO Brand_Lab Gruppen suiting the SM91 for conditions

suiting the SM91 for conditions where an omnidirectional pattern makes other surface-mounted microphones impractical

Microphones Element Fixed-charge back plate

" the single output PW9V

the SM91 surface-mounted microphone discriminates against sounds originating from the rear

String Gauges:

AMX AR-45 4-Pairs Stereo Speaker Selector Box w/ Impedance Protection #2158 - DEMO Brand_Lab Gruppen suiting the SM91 for conditionsProduct ID : DISTRIO M 2158 Speaker selector for 4 pairs of speakers. Can be operated individually or combined. Separate left and right ground paths for compatibility with all amps, even bridged. Optional Internal impedance adaptor with switch to keep impedance constant at the amplifier. 70 watts rms capacity. Accepts wire up to 14 gauge. Dimensions: 216mm x 112mm x49mm.