I used their rack oriented bass amps for years, like the BX 500, and 1500 amps. Never played any of their basses. For a rack mounted amp, I thought they were fine, for a lot of features all in one amp like a crossover, compressor, separate power amps in one head, etc. Never had a problem with any except the BX 500, when it first came out; it had solder joint problems, and Carvin immediately replaced it with a new one. Since I got tired of the whole rack unit thing and went to smaller heads like the Genz Benz, I don't use them anymore, but you will hear no complaints from me about their products or service.