Sound Skulptor MC624 User Manual

1.

Overview

The MC624 lets you select one out of six stereo line level audio sources, adjust the level and route it to one out of four
stereo amplified monitor pairs.
The level can be set in very accurate1dB increments.
It gives you the possibility to listen to normal stereo, right only, left only, left + right (mono), left & inverted right, left –
right (difference), dimmed and mute.
Each input can be configured for balanced or unbalanced, -10dBV or +4dBu level and an offset can be added if needed
to correct input level differences.
Each output can be configured for balanced or unbalanced and an offset can be added if needed to correct output level
differences. Output 4 can be set as a Sub output.
An infra-red detector allows controlling the MC624 from an ordinary TV remote.
Several units can be linked together for surround. One unit is the master and controls the other units.
2.

Design considerations

The design objective has been to put as little electronics as possible between input and output. The total passive
approach was ruled out because of the stress it puts on the audio sources, increasing distortion, when you want to
achieve a low enough output impedance, necessary for the noise immunity. So we opted for a unity gain buffer, optionally
switch-able to provide the12dB of gain, necessary for the semi-pro -10dBV compatibility. The buffer used is one the
best op-amps available today (spec'ed distortion at 0.00008%). This buffer is the sole active component in the signal
path.
Copyright ©2014 SoundSkulptor
Sound Skulptor MC624 User manual
Document revision 1.1 – Last modification : 20/10/14
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