Excellent 
by Rodrigo Lara from Sao Paulo, SP BRAZIL, July 2008
Music Background:  Hobbyist

If you (like me) are not willing to drag a 60-pound rig around and still sound good, you should give this rack a shot. Among the many good things I could say about it the best one by far is that it is really easy to get a good tone out of it with just a few tweaks. Already tested it with lots of amp heads (some pretty ugly sounding ones I should say) and I always can manage to get a good tone. The guys I play with noticed the difference immediately: first because I used to be the guy that took forever to get a usable tone, now I spend a minute or two to get it, second because the tone I get can really cut through the mix. The sweepable Mid control is a blessing!
It´s been 4 months now since I bought it and I can only say great things about it. Ok, this is not a SVT Classic rig, but it sure does not weigh as much and still can deliver a lot!

  Incredible! 
by Eric G. from St Louis, MO, December 2007
Music Background:  Bass Guitar

Been playing bass for 20+ years - I've own lots of amp & preamps, but nothing like this. I don't make that comment lightly. You owe it to yourself to give one of these a try. In all sincerity, it may just be the biggest improvement to your tone you'll ever make. This preamp is the most dramatic improvement to my tone than anything I've ever tried in over 20 years. This unit replaced an Ampeg SVP-Pro all tube preamp. The SansAmp RPM just plain sounds better, and I don't mean by just a little - far & beyond better. You couldn't hand me the Ampeg back for free, I'd never use it again. What is equally amazing to me is that just between the 3 bands of EQ (bass, treble, mid w/mid-sweep) I can get such an amazing variety of tones. This is coming from a guy who has always ran a fully parametric 5-band EQ in his rig. Trust me - this thing is flat out incredible. Just running through the circuit and using the 3-band EQ (whether you decide to mix in some Drive or not) will do it's magic for your tone. The main difference between the Ampeg SVP Pro & the RPM is that the RPM emulation encompasses the FULL Ampeg SVT tube sound (power tubes, not just the preamp tubes). Whereas the Ampeg, with only preamp tubes, only gave a taste of the full SVT tone. Huge difference. The sheer amount input, outputs, effects loop w 50/50 mix, Blend control & overall signal routing offers total flexibility to novices up through studio & gigging pros. The beauty of the SansAmp is that there are no tubes to mess with, worry about or replace and - NO TUBE HISS like with the Ampeg. Geddy Lee recently started using the RPM model (over his RBI model) due to the greater tone capabilities that the semi-parametric Mid-sweep offers. I understand that the RPM also offers more overall gain when using the Drive function than the RBI unit. If your looking for a major improvement in your tone & to obtain the classic Ampeg SVT tone, try out the SansAmp RPM.

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