The Coleman Audio M3PHMKIII has been upgraded with a 47 position stepped attenuator made exclusively for Coleman Audio. This is the most accurate level control available period. Perfect for mastering. Four stereo inputs to A/B input signals. Three stereo outputs for main and alternate speakers. Output #3 can be switched to a fixed output for meters or a cue system. Engineers headphone output has it’s own level control. Left and right mute switches, a mono sum and a phase reverse switch. When the phase reverse and the mono sum both are engaged you get a L minus R in the speakers to monitor the side channels. The main signal path is passive, so no noise or coloration will be added to the audio signal.

The Features
-DAW/hardware control room monitor controller
-Replicates the master section on a console
-Completely passive design - won't color your signal path
-Switches between 3 pairs of speakers for playback translation
-Accepts stereo inputs from up to 4 sources-47-position, 4-gang stepped master control (+/- 0.05dB) promotes a balanced stereo listening environment
-Balanced XLR connectors minimize noise and maximize output
-L/R mute switches let you audition speakers independently
-Mono switch (L minus R) collapses audio to test for mono compatibility
-Polarity reversal switch highlights speaker phase issues
-Mono + polarity nulls mono material to review side content
-1U chassis is rack compatible
-8-ohm headphone output lets you monitor silently or feed a headphone amp
-Internal switch makes output #3 fixed to feed VU meters or a cue system-115
-volt/230-volt switch on power supply circuit board