Subwoofer ... it is hooked up, but no sound

Oknkyo SKW-791 has build in amplifier. So it can be connected through Line Out Connector of sansui amplifier. If speakers out is connected with subwoofer, the circuit board in subwoofer will be blown.

There are several causes of this problem. My be mute is ON, may be fuse is blown etc etc. However refer to page 62 of manual, it will help.

HT-S6500_English_2022-11-02-204020_ivkn.pdf (onkyo-av.com)

Maybe "Polk Audio PSW10 10’’ "&there’s no sound the standby light is red. Connect onkyo av-amp sub pre-out to line in and enter Onkyo av-amp speaker setting then subwoofer level calibration finally set +10db.

Assuming you have all 5 speakers and a powered subwoofer it's very simple. There is an RCA plug labeled "Subwoofer Out" that goes to your powered subwoofer. The speakers are labeled as well Left/Rigt Front and rear along with center. Make sure you hook them all up Positive and negative exactly the same or it won't sound right. Phase issues are the number one cause of bad sound and, besides, why spend money on a good ONkyo if you don't intend to do it right? Hope this helps

champ natwork problem

Also, it could possibly the preout terminal itself that is not working. One way to prove that is by transferring the subwoofer cable from the preout and temporarily transfer it to the tape out section. If it ouputs sound from there, then that means the speaker and the cables are working fine and it's just the preout terminal itself that is not picking up anything. ^_^

Turned out to be a level problem.

Just plug the rca cable from the Onkyo into either of the 2 RCA's on the subwoofer. It'll be fine.

Geno

Talked to tech support at Onkyo and there seems to be two (2) places you can hook your sub up to. I placed mine in the wrong slot. So please double check where you placed the sub connection.

I fixed my subwoofer. The resistor at R16 (right next to the fuse) was the fried component. I removed it and replaced it with a 13K ohm 5 watt metal oxide resistor (from Mouser Electronics if not available locally). Works fine now. I got the solution and the circuit schematic from an audio hobbiest at diyAudio.com. This is, evidently, a fairly common problem.