I believe the bass response is more due to the actual headphones and not the unit itself. As for the volume control not tracking evenly as the gain is reduced, it may be due to a bad volume pot. Try all three controls to see if it does it universally. Also make sure your connections are solid...

I have one of these that I use as a monitor while doing live classical recordings. I have one of these which I use on location classical recordings. It is ideal for the times I need to provide multiple headphone monitoring for producers or during playback. I grabbed it because of the, more than...

First; the standard rack width is 19" and Benchmark makes an adaptor just for this purpose. Lavry may also as both of these companies cater to the pro market where 19' rack mounting is the rule.