Technical question for all you electronics gurus: I am considering purchasing a power amp and running bass -> preamp -> power amp -> cabs. Output impedances for preamp are: XLR out - 600 ohm 1/4" out - 10K But the output level is subject to the Volume control. I am considering running it into a Carvin DCM1001, which has an input impedence of >20K ohms, balanced. According to Roger Sadowsky: "My preamp is not designed to go straight into a power amp. It probably will work, but that is not the intended application." Question: How can I determine if it WILL work without incident? Should I not even consider this? Also, how is it that the SansAmp pedal can run into a power amp if it also has volume-affected outputs?