I have a mint condition Manley Variable MU Stereo Compressor/Limiter that was used very lightly as a showroom demo (not powered on). This unit offers that signature Manley punch and clarity on a stereo source, typically in a mastering environment! I'm the original owner and this unit, as mentioned is in amazing shape. These retail new for $3960!The renowned Manley Stereo Variable Mu compressor/limiter is a favorite of producers and recording engineers - and one listen to what this device does for your sound will make you a believer, too! Anyone who has heard the classic Fairchild 670 Series limiters in action has an idea of this Variable Mu's capabilities - but the sound is even sweeter with the Variable Mu. Its adjustable attack and release settings are optimized for mixing and mastering, but are flexible for most tracking situations. Sonically versatile and dependable for daily use, the Variable Mu is Manley's best-selling device.