Re: Bye bye Bogner, hello Marshall. NAD!
This is what I have learned from researching this amp. The amp was designed as strictly a single channel amp and should only be played as such. Its a great amp for picking dynamics and volume knob riding. Originally the high dynamic range was the only option, but then later the low dynamic range was added so that it could get the same effect as turning the guitar volume way down but by using a foot switch. Trying to use that as channel switch or a solo boost will result in frustration. The jump is too much. LDR works great with pedals, though.
It's a bit of a tricky amp to dial in. The mix ratio of the detail and body knobs is crucial and has more impact on the voicing than the EQ section. The amp has a post PI master, so it really needs to be set no lower than 5 for the best tone.