Onkyo SC 570 stereo speaker has hissing sound

The Onkyo receiver is designed to use 2-wire speaker wires. Amazon has adapter cables. This one is for use with M/M RCA audio cables: https://www.amazon.com/Speaker-Wire-Stereo-RCA-Adapter/dp/B076P7KP3D . You'll need one pair per speaker. This one, https://www.amazon.com/Speaker-18AWG-Adapter-Cable-UIInosoo/dp/B097XV7QNL/ref=pd_lpo_3?pd_rd_w=ZUie5&content-id=amzn1.sym.116f529c-aa4d-4763-b2b6-4d614ec7dc00&pf_rd_p=116f529c-aa4d-4763-b2b6-4d614ec7dc00&pf_rd_r=1DWE6KY3W0JYFQT74WZT&pd_rd_wg=QGafl&pd_rd_r=b6c31a62-2ae3-406f-9e66-6333f7edbf7b&pd_rd_i=B097XV7QNL&psc=1 , is for a direct connection to a RCA F connection on the speaker.

I hope this helps.

Cindy Wells

check your speaker wiring, make sure both terminals are connected properly. or could just be left speaker is disconnected. and is set in stereo mode which will only play left and right front and Sub, if you have one. try chaning the surround mode to play in multi channel speaker which will send sound to all speakers. i trust your using a Digital audio cable from your source ( cable box, DVD player) if your using analog audio cable you will only get stereo sound, and nothing will ever come out of the rear speaker unless you change the surround mode to multi- channel speaker. also in the setup menu you should be able to perform a speaker setup, make sure all your speakers are able to produce sound. follow speaker setup mode in menu, make sure you have checked the boxes or Yes to speaker you have in your system. then perform calibration and a test tone will come out of each speaker as you select them.

You don't say what source(s) are affected. I'm guessing TV or Cable-TV is the problem because music with vocals has voices and you say it sounds ok. Your speakers have no clue whether a sound is a voice or music so that lets THEM out and your receiver doesn't know or care either.

In the modern multichannel world it's usually assumed your electronics are multichannel. This receiver is old-school stereo.

The Center channel is usually where voices are found but some systems (like yours) don't have a Center speaker so they have to be configured to share the Center duty with the front left and Right speakers.This isn't possible or even normally necessary in your case. WYSIWYG

http://www.retrevo.com/support/Onkyo-TX-8222-Receivers-manual/id/469ci869/t/2/

The audio coming in from 'wherever' should be correctly mixed to 2-channels at the source or you'll probably be missing something. I'd look higher up the audio food chain for where the voices are being attentuated. If a cable box is involved I'd look at its audio settings regarding stereo mix-down

Wait, I just had an inspiring thought. Centered voices being mono in nature would partially cancel out if your two speakers were out of 'phase' with each other. Bass would also suffer. Make sure your two speakers are wired identically regarding the red and black (or plus and minus) conductors. If turning the Balance control fully to one side makes bass of voices sound louder you probably have a phase mismatch. Reverse the wiring on either speaker to match the other. There is no absolute right or wrong for phasing as long as they're all the same.

theres a short in the wires either inside the box where the speakers are or the channels are blown.

Does it only happen when its being stressed (played really loud)? Is it hot? If so, is it well ventilated and away from other heat sources?

Somewhere in here is the answer.


"The AV receiver turns off as soon as it’s turned
on
• The amp protection circuit has been activated.
Remove the power cord from the wall outlet immediately.
Disconnect all speaker cables and input sources,
and leave the AV receiver with its power cord disconnected
for 1 hour. After that, reconnect the power cord
and set the volume to maximum. If the AV receiver
stays on, set the volume to minimum, disconnect the
power cord, and reconnect your speakers and input
sources. If the AV receiver turns off when you set the
volume to maximum, disconnect the power cord, and
contact your Onkyo dealer."

That last sentence is misleading. I don't think they actually want you to play an active signal at MAXimum as a test. I think they mean with all sources attached and an idle one selected, like CD, crank the volume knob. If the amp is not in Protection mode you should always be able to detect some hiss up close.

For another thing, if it shuts down only with speakers attached the problem could be outbound at one or more of the speakers. I would isolate that piece somewhat before throwing my hands up and calling Onkyo. Make sure that the speaker cables are not shorting. Disconnect certain speakers and try it again until you figure out which one(s) are involved. Then it could be the speakers.

The surround processing portion of the unit has a problem. In either stereo or direct mode, the digital procesing is bypassed. This could be just the surround processing IC, but that IC may not be available as a separate part. I would suggest that you bring this unit to an authorized Onkyo service center for an estimate.

Dan

Hook a graphic equalizer between the piano and speakers, and turn down all sliders above 8 kHz. Since the highest note of a piano is 4186 Hz (4.186 kHz), you'll still hear all the notes but cut the hiss. If the hiss is coming from the speaker's power amplifier (in which case the equalizer won't help), turn down the speaker volume and turn up the piano volume. Live instruments generally need some doctoring to sound good through high-quality stereo equipment, as they only produce a limited range of frequencies whereas good speakers reproduce a lot more - including hiss.

Try to see if the reciever will make the buzzing/noise without anything connected to it except power, and speakers. Tune into a local radio station and see if the noise continues. If the noise has stopped, then you know there is an issue with the player or cable.

don't switch to stereo mode. switch to prologic mode

check speaker fuses.