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Loud noise coming before start new song from usb pre amp

Each time when a new song start to plays, a loud noise seems to be appeared from the sub woofer and also speakers. Btw my I'm using pre amp with usb .What's is my problem actually?

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  • 15 Answers

The problem is that you dont have proper earthing on the amp so that is why you will get a engine idling noise. you may need to put in a device called a supresser which will connect to the amp, or try using a 8 to 10mm earth cable from amp to the booth body for earthing. also make sure that you are not taking the earth from your car battery cause that will cause the noise aswell. hope this helps you.

Posted on Feb 18, 2014

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Posted on Jan 02, 2017

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tech48
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SOURCE: HOW TO CONNECT SUB WOOFER IN 4CH CAR AMP

sounds like you need another amp, if the amp has a speaker already connected to each channel, you have no open channel to connect a sub-woofer.
Some years ago I seen an amplifier that was designed to use 3 speakers on 2 channels. what they did was had a speaker on each channel and then they bridged the 3rd speaker across it. That amplifier was designed for this configuration, unless you have an amplifier like that you should not try it. It may result in smoke from the amp.

Posted on Jun 17, 2008

  • 631 Answers

SOURCE: THUNDER 5601 WHEN VEHICLE TURNED ON, SUBS BOOM, THEN WORKS OK. ALSO WHEN RADIO TURNED OFF

If the amp produces no boom with no signal input cables connected, I'd suggest using an LOC.

Let me know if you have any other questions.

Posted on Sep 30, 2008

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read ther link below for more indepth detail on noise filters.


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It would be helpful to know if this is a new problem on working equipment or a new problem on NEW equipment. And if you've flipped through the manual without success.

Of course you KNOW the sub must have its own amp, right?

First, you need to determine if the Onkyo or the unnamed sub is at fault.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Onkyo-TX-SR608-Receivers-manual/id/23653ag916/t/2/

At the Onkyo, check to make sure you have run the speaker setup starting on Page 40. If that doesn't work...

Disconnect the subwoofer pre-out at the Onkyo and move it to the VCR Out, tune an FM station and be ready for some real loud subwoofer output if your sub has no volume control of its own. If you can hear the sub, it works and it's back to the Onkyo. If not, the unnamed sub

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You have damaged the sub by playing it too loud.
Its either the map or speaker that has gone.
You should send it off to get repaired.


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Please dont forget to vote this answer was helpful

Many thanks

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Since the unit recovers once it has powered down. I suspect that the internal protection circuit is kicking in. Check the wiring and be sure that there are no crossed wires anywhere. These amps are designed to work with 2 ohm loads and can take a direct short for a short period of time. If the wires appear ok, measure the speakers with an ohm meter. If the speakers are 4 ohm rated, they should measure just under 3 ohms with the meter, If they measure less than 2 ohms, there is a problem with the speakers.

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