Thank you for the response. My comments were based on personal experiences. I've used the RBI in the studio and lived it. I was able to get extreame bottom end while adding a gritty harmonic too end that I've only been able to achieve using guitar amps. I nearly purchased the VT 1000 after playing through one, and I was able to get that same characteristics as the RBI. I'm aware of the difference between the two, however, even with the dUg low end side soloed and the LPF disengaged, it still lacks the top end as opposed to your 1969 or VT 1000 amps, IMO. I currently running a separate head for my effected side, and blending them together but I'm really looking at the VT 1000 along with the dUg. I would essentially have a four amp setup running through two cabs. I absolutely love what you've done and up until I switched to Tech 21, I never thought I could get the tone I have without lugging around SVT''s and Marshall guitar amps. I'm a believer..