The speakercraft Starlet 9 speakers need to be bi-amped. I know it is possible to do with my AVR300, but can the output of each amp be adjusted? The Starlet 9's need 2 amps for each channel with an adjustable gain so the speaker can be tweeked by using pink noise and a volt meter. If this is not possible then is it possible to run another enternal amp with the rca outs of the AVR300 while still using the AVR300's internal amp at the same time to bi-amp? I would purchase and external amp with adjustable gain and with the same power rating as the AVR300. Any recomendations from people familiar with the Speakercraft starlet 6 and 9 speakers and the AVR300 functionality would be appreciated.