Sine Systems Model ACU-1 Stereo Audio Control Unit

Prophet System Sine Systems Model ACU-1 8 Channel Stereo Audio Control Unit

Prophet Systems Sine Systems Model ACU-1 (8x1) Channel Stereo Audio Control Unit

Sigma Electronics VSS-120A 12x1 Video / Stereo-Audio Passive Switcher

Kramer VS-81A 8x1 Audio Stero Switcher

Extron IN1508 Video Scaling Presentation Switcher Media Switch Rack Mount TESTED