Yamaha O2R mixer ch19-24 stereo 1/4 pre-amp board tested/working see pix/demo

Yamaha O2R mixer Stereo RCA out/send 1-2 board tested/working see pix/demo

Yamaha O2R mixer adata 4 slot option plug board tested/working see pix/demo

Yamaha O2R mixer monitor out/send 5-6 board tested/working see pix/demo

Yamaha O2R mixer MIDI/SMPTE interface board tested/working see pix/demo

Yamaha O2R mixer AES EBU interface board tested/working see pix/demo

Yamaha O2R mixer XLR Main Output board tested/working see pix/demo

Yamaha O2R mixer Studio/Channel/Pan board tested/working see pix/demo