I’ve read your post and had a look at the manuals for your gear to find out what they do and how they operate. I have a couple of questions to start with:
What sort of settings did you have your bass and amp eq’s set at?
Have you tried your bass straight into the amps active input, [b][u]without[/u][/b] the compressor in the effects loop? How did it sound?
Have you tried your bass straight into the amps active input, [b][u]with[/u][/b] the compressor in the effects loop but [b][u]with[/u][/b] the bypass switch enabled? How did it sound?
Have you tried your bass straight into the amp [b][u]with[/u][/b] the compressor in the effects loop but [b][u]without[/u][/b] the bypass switch enabled? What were the compressor settings? How did it sound?
Mike