Well really the Onkyo is not your weak point, your speakers are. If you are using the LCR model across the front they have poor frequency response, and are 4ohm 86db speakers, not meant to be driven by a mass market receiver most of which are designed to drive 8ohm 90+db speakers. What that all means is that your speakers need far more power to drive than most. I would bet that you have noticed that your receiver runs hot and you need to turn it up high to get good volumn levels. I would either add a honkin big power amp to your receiver to drive your speakers and give that Onkyo a rest or better still replace the speakers because you won't get all that the new formats have to give.
bill
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