OK, I just bought a Crown Power Amp to pair with a SANSAMP preamp of some sort. I have a PBDDI already so I am curious if anyone has compared the different SANSAMP Bass Pre's driving a power amp. Is there any advantage to going to a RBI other than the dedicated Mid? Is it worth it? I like the PBDDI since you can get 3 different tones at your feet. Anyone try all of them in front of power as well. PARA BDDI PBDDI RBI RPM Note: The newest generation of SANSAMP pedals has a 1/4" OUT BOOST.