[quote name='EliasMooseblaster' timestamp='1384513086' post='2277507']
How easy is it to bypass the preamp on an RB4?
I only ask because it was really easy on the HCM series - literally just a case of pulling the speaker jack from the back of the preamp, so you could connect a different head if you wanted (which is what I'm doing these days with my Ashdown LB30). By contrast, I noticed that the connections on the RB8 are all internal, though - did you have to crack open your RB4 to do the bypass?
OP: I guess it depends on the tone you're after. Starting from flat, I usually find that Laneys are a little brighter, the Peaveys I've played through are little more bass-heavy. But with a few tweaks of the EQ, you could quite easily make one sound like the other, both seemed very versatile.
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Instead of plugging into the input on the front-panel, I plugged into the FX return on the back (via my Sansamp as a pre-amp) which goes straight into the power-amp. Doesn't sound quite like what you're doing with your Ashdown as I was still using the power-amp in the Laney.