I have an H/K 335 running a 7.1 system. (Please bear with me as this may be a stupid question.) I have access to an AVR 230 for very cheap. Can I hook this 230 up as a pre amp for the mains? When used as a pre-amp does the power from both the 335 and 230 get used for the mains or is it one amp or the other? If it is the latter, I will stick with the 335. Thanks for any help, Derek