I was wondering if anyone would be willing to do a simple test for me? I have the Onkyo TX-DS484 receiver and according to onkyo, when the sub is set to on and the speakers set to large, the sub gets crossed over at 80Hz and when they are set to small they are crossed over at 120Hz (they swear by this). Well on my receiver, with the sub set to small the crossover works, 80 or 120, all sound from the sub. And when they are set to large all sound is coming from the main speakers, nothing from the sub(like all other DD decoders). I used a test disk that had a frequency sweep form 125Hz to 20Hz. Can someone with a similar model from this line do these test for me? See if you have sound coming from your sub with the sub set to yes and the speakers set to large and small while running a frequency (120–20Hz or test tones below 120HZ) sweep in DD Thanks!