Jerry,

I have not experienced any dropoff of bass, mids, or highs at any of my gigs. I am using two of the compacts and that might make a difference.

I have also tried using a Mackie 402 mixer with my two compacts but did not feel it made much of a difference. Any fine tuning I needed to make I was able to do with the keyboard. The first time I used the mixer I thought I heard a difference but after a few more times I wasn't impressed with any help the mixer was adding. I returned the mixer today.

Hammer