Hello! I am not much of an audiophile; but I got a really good deal on a Pioneer VXS-321 receiver and thought it was time to try something different from my usual 'All-In-One' home theater boxsets.\n\nThe receiver does seems to work perfectly. I get video from HDMI to the TV from multiple sources without problem, but sound is random. It might come on almost as soon as the receiver is turned on, or it might take a minute, or five minutes or ten. It does always eventually play audio, but it is very sporadic as to when.\n\nFrom the control panel it does show that the receiver is finding the audio signal. I have tried today using a RCA digital coaxial cable for the audio rather then HDMI, but the result is exactly the same. The receiver sees the digital hookup and says it is using it, but there is still a delay in sound being produced. I have also tried swapping to a more expensive audio store bought 'High Speed HDMI' cable, but again I see no noticeable change.\n\nI do not believe it is a problem with the receiver itself. The person I bought it from has told me he has had no similar problem with the unit, and has has been quite helpful the last few days in trying to get the unit set up and working. He has even offered to buy the unit back, so I do not think this is a issue where he has sold me a defective receiver. Plus, if something had failed I suspect there just would be no sound at all, rather then it being a random delay.\n\nI have checked and even changed the speaker wiring in case it was a short, but that did not seem to improve anything either.\n\nI have been doing a lot of snooping online, trying to diagnose the problem and I now have a question that I have been unable to find an answer too. In the owners manual for the receiver it states '8 Ohm' speakers. I am using it with my old home theater system speakers (Which were already set up and placed where I wanted them) but see they are 4 Ohm.\n\nAs I have tried everything else I can think of, is there any chance it is the speakers themselves that are the problem? When the sound kicks in, they do seem to work just fine but I do wonder if the difference between what the receiver is likely expecting and the speakers themselves is perhaps an issue? I have read that the difference can lead to different problems like the receiver overheating at high volume, but nothing about if it could cause a problem with the audio itself. I can replace the speakers if need be, but would really hate to buy and install a complete new set of speakers as part of the troubleshooting process. Especially if it was not the problem.\n\nSo I would like to ask if anyone has any suggestions on this odd issue, and hopefully I can get the sound working a little more dependably.\n\nThanks!