Re: Marshall JMP-1
Yep I have one too, and I like it alot. I have run it in several configurations and it has never failed to come up to par. At the moment I am running it with a behringer virtualiser, (sometimes) through a valve compressor and then either straight into the pc, or through the power stage of my peavey mace head. With the compressor in small room environments you can get amazing sounds out of it. Make no mistake these are professioanl units, and for £250 - £300 you really can't match that. I have used a few other pre-amps, although to be fair they were mostly tranny, and I have personally never heard anything of that class that even comes close to the Marshall.
I suspect that there are much better solutions (in terms of pure tone) at more money, but for value and basic functionality it cannot be beaten (ok mayde the ada). The whole midi thing adds ALOT of other options to your rig.
To be honest I can't see why more peple don't use rack gear now. It is very reasonably priced, completely scalable, high quality, and the sound is truly fantastic.
One other thing. As far as I know the basic design and ideology of thta unit hasn't changed for maybe 15 years (?? maybe more I don't know), something must be reasonably about it for it to last that long.