Just bought a 20-39 PC Plus, I was quite astonished at the sheer power of its movie performance. Unfortunately I can't get it to perform at all in stereo only. As you know there's no separate RCA/Phono LFE output on a typical amp/preamp setup. I originally had my REL Strata connected to my amp's speaker output into its high level input and connected the speaker(s) into the subs high level output. This configuration worked quite well but with the SVS the speakers plugged into HL output are silent and bass output from the sub is truly awful, boomy and undefind. I'm assuming that's because the amplification is not coming from the built in amp of the SVS but from the external amplifier, although the amp is amongst the top marques produced in the UK (Chord SPM 600) there shouldn't be a shortage of power. Any help greatly appreciated.