I have an Onkyo SKW-200 powered subwoofer that is about 6 years old. It has always worked just fine with my Sony receiver until recently. When the receiver is on and using any ouput (ie. cd, dvd movie, TV cable box) the light on the subwoofer is green but there is no sound from the subwoofer. If I crank the volume fairly loud on the receiver and reach under the subwoofer housing and tap on the speaker cone, sometimes it will start working. But, then it will stop working after a period of time. I think it stops when the signal dies down (ie. end of a song or quiet period in a movie). I have tried swapping the cable: no effect. I tried on my other stereo: no effect. Fuses are good. Any ideas?

SOURCE: Onkyo subwoofer not working

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.

ALBERT GARCIA

• 975 Answers
• Posted on Apr 19, 2008

SOURCE: Onkyo SC 570 stereo speaker has hissing sound

if you already switch the speakers to make sure that is NOT the receiver , then theres two things , check the TWEETER or check the capacitor or Crossover inside the speaker box , you gonna need a multimeter for this task . hope it helps

SOURCE: Onkyo TX-DS484 Receiver

Unit will not maintain the balance after the unit is powered off

SOURCE: new home theater setup- no signal at tv using onkyo tx=sr605

This might somewhat help. Today I went back .. I went HDMI out of the Cable box and DVD player into 2 of the TVs HDMI ins. The digital audio out from each, straight to the receiver and things are working ok. All speakers are working OK. Sound isnt as loud or crisp but unfortunately I found no other solution.

SOURCE: Powered Or Unpowered Subwoofers For Onkyo TX-8511

Greg- Powered subs are better than non-powered subs (also known as passive subs), anyway I see the TX-8511 has no sub pre-out on the back panel, so you need to decide what sub you will use and run from the receivers left and right speakers output into a subwoofers speaker in from speakers then back out to speakers, look at the back of a subwoofer and you will see like 4 sets of speaker hookups 2 in and 2 out, what this does is takes the low end or bass and drops the signal to the subwoofer then takes the mids and highs out to your left and right speakers, unless your regular left and right stereo speakers have large woofers a sub is the way to go.