I recently ran a sansamp bass driver directly to a power amp borrowed from the band's PA rig to see how it would work. I usually run through a Hartke 3500(350 watts@ 4 ohms). The Power amp, and I'm sorry I don't remember the exact specs, was something like 600 bridged at 4 ohms. Everything was connected properly, and I couldn't get enough volume to come close to the Hartke. My question then, is has anyone else tried running a SABDDI as the only pre? The maual states that this can be done, but do they overestimate the gain leaving the unit? I was really looking into this as an alternative to my current amp setup.