The CMC4 gives you the control of your sub woofer. Once a balance is set between the main speakers and the sub woofer the main level control will control both. There's also a mute switch to check your mix with or without the sub.
Studio Economik New 500 series preamp from Geoffrey Daking featuring vintage Trident A Range tone, Jensen input transformer and Class A circuitry. The variable high pass filter is indispensable for tracking sessions!