yep, im using the powered sub with 5 outputs for front, center and rears. The same one used in htd302. However, im using a kebao player, not a daichi. I did exactly the same test ya did, the subwoofer played fine by itself. Even with the tones test of the player it played fine. With or without the fronts, center and rears attached. Probably a setup problem with the player itself, audio is probably downmixed. Hope this helps.