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Humming from speakers when CD player running

Hi i have a Technics 200 watt receiver/amplifier and 6 disc (cartridge) CD player connected to my Sony speakers. The receiver/amplifier only had a connection for 2 speakers, and i have 4, so I wired two speakers on each connector. the prob is there is a loud humming from speakers when i have the CD player there a solution for this?

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Re: humming from speakers when CD player running

Yes, The humming is always there you just can hear it better when the cd is playing. The humming is caused by the electrical system in your car. There is an inline filter you can buy and insert it between the car's power source and the head unit. I had a head unit I bought that was absolutly terrible until I installed that filter. Also if you did a do it yourself job on your amp wiring it is usually best practice to run your RCA cables on the opposite side of the car as your power cable. You can also purchase shielded spark plug wires which is a source of noise usually of a different kind tho. First make sure you have a good ground. This means that you have grounded your amp to bare metal not painted metal. If that didn't work put in the inline filter on the head deck as they are only $20 available at radioshack. If that doesn't work, go back an wire your car right this time and put the power and RCA on opposite sides of the car. If you still have that hum it may be the spark plug wires but that sounds more like static than hum. You have a text book case of alternator hum... Hack

Posted on Jul 12, 2007

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Where can I get a manual or user's guide for this?

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Sony CorporationBe among the first to get the latest Sony news in your inbox. ... A/V Receivers; Blu-ray Disc™ Home Theater Systems; Blu-ray Disc™ Players ... Car Receivers & Tuners; Car Speakers & Subwoofers; Car Stereo Amplifiers; Car ... If you prefer a paper hard copy of a manual, you can purchase it from the True Manuals web site.

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Products 1 - 50 of 304 - Pioneer DVD RDS AV Receiver User Manual ... Pioneer CarCD MP3 Player Instructions Guide ... Pioneer CD Player User's Guide.

Dec 22, 2015 | Car Audio Receivers

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Sony xplod drive-s cdx-gt31w power comes on but no sound comes out of speakers

your sound ic is blown if you can get hold of an amplifier connect it to your deck and if you get sound out of it then your sound ic is surely blown and will need replacing

Jan 01, 2014 | Sony CDX-M10 Car CD/ MP3 Player

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I have a Sony CDX-M30 Marine Stereo that when the volume is turned up over 20, it cuts off, then comes back on and if you don't turn it down, it cuts off again. Recently, it only has to be around...

One possible cause is a mismatched speaker system. Most stereo equipment specifies 8 ohm speakers to match the 8 ohm amplifier output resistance. A well known electronic formula states maximum power transfer occurs when the resistance in and the resistance out are equal. When there is a mismatch, more power is required to obtain the same sound pressure levels. By turning the volume up higher to do this, the electrical requirements to drive the speakers at that level may be exceeding that which the amp can provide. When this happens, the amp shuts down due to overload. Continued operation in this condition can cause permanent failure.

Another possible cause is the power requirements of the speakers to be driven properly. Larger speakers require more power to move the speaker coil and and cone. Connecting a speaker that requires 10 watts to be driven to an amplifier that provides up to 8 or even 10 watts will require that the amp be operating at 100% of capacity. An amplifier run like this will have a short life.

Connect speakers that match the amplifier's impedance requirements (8 ohm types are pretty standard / common) and will operate with the amount of power (in watts) that the amp can supply. Make sure you're comparing watt ratings in similar units. "P-P" (Peak to Peak), "Peak" (or Max") and "RMS" are typical terms. RMS is the is the most common standard used, but as you'll see below, some manufacturers like to use different units to make their products seem to have more power than they actually do. You can convert easily between the terms like this:

200W P-P equals 100W peak, and also equals 71W RMS

"Peak" is 1/2 the value of "Peak to Peak" (P-P) and "RMS" which stands for Root Mean Squared, is 70.7% of Peak. 200W P-P sure sounds like it's more than 70W RMS - doesn't it? It's all pretty simple once you know. Lastly, the fictional unit "Music Power" can be anything really, but is often either Peak or P-P values. It's just more smoke and mirrors by some manufacturers.

I hope this helps and good luck. Please rate my reply. Thanks!

May 12, 2011 | Sony CDX-C5005 CD Player

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Installing a new stereo. I am trying to install a ''JVC KD-R210'' in my wifes 1985 BMW 535i, replacing a Sony CDX-R79 and in the trunk is a Pioneer 12 disc cd changer that was hooked up to the system. This...

There is a line level converter that would need to be purchased to that you can get the front speakers to work with the amplifier. The stereo already has rca jacks for the rear speakers. You can connect these straight to the amplifier for it to work. Bes sure that you use the blue wire to connect to the remote turn on for the amplifiers. Once you get the line level converter you will connect the wires and connect the converter using the RCA jacks. The question would be how was the 12 disc changer connected to the system. Would need more information on the changer in order to help with that component.

Mar 13, 2010 | JVC KD-S550 CD Player

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Speakers in my vet dont seem to work

Yes, if your car speakers are ran through that amplifier that red wire (power wire) needs to be connected to the battery. I would make sure that there is a brand new, or clean terminal to connect to the battery. I usually use a ring terminal on the end of the power wire to connect to the positive battery post bolt. If you do not have a ring terminal on the end, you do not need one, but I do it for the fact that it is a cleaner installation and a certanty that it will not fall off the positive post. If you have any questions feel free to email me at put subject vet amp no sound.

Feb 27, 2010 | Panasonic CQ-C1401U CD Player

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I have a jvc kds580 and i wanna run a passive Bazooka EL and 4 other speakers. Can i drive the sub with the 2 RCA OUTS on the back of the unit? If not, how do i drive the sub?

RCA Outs are very low power signal connectors. They would have a hard time running a pair of headphones.

What you need is a Power Amp that the RCA's plug into and your subs Connect to.
You need an Amp (Amplifier) that powers a similar number of Watts to what your Subs Capacity is. (ie; your subs have a ratting of 100W (Watts), then you need an amplifier with 100W per channel; that's a 200W amp for a two way (Speaker) amp, or a 400W rating for an amp with 4 channels (4 Speaker connectors)
You can run a lower power amp on your subs, and use ony a portion of your speakers capacity; but if you get an amp that supplies more wattage than your speakers capacity, then you'll blow your speakers, their performance will deteriorate slowly. eventually they will not be able to generate a clear reproduction, Speakers are irrepairable.

Sorry for the long explanation.
This is something you wan't to do right, the first time.


Jun 21, 2009 | JVC KD-S580 CD Player

2 Answers

Can't fit subwoofer amp leads to pioneer DEH-2000MP Head unit

pioneer head units only distribute like 200 rms or so to the speakers. you might have to find a blue maybe even blue with white striped wire and nick it just enough to tie your amp wire around it. tape it up and see if it works.

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Need to know

I would recommend running a four channel amplifier using component speakers up front and co-axial speakers in the rear. You can add more speakers up front, but it depends on what you're trying to accomplish in your car. Do you want it louder? Do you want it clearer? Any system will benefit from an amplifier. More power to your speakers will give you better sound because you'll have more accurate control over the speaker cone. This extra power will result in better clarity, not only at high volume, but low volume too.

Sep 06, 2008 | Kenwood KDC-3024 CD Player

2 Answers

Not satisfy with the sound of my system

This Unit has got a 4x60w amp built in.

On it's own the subwoofer will not work, you need to buy a Monoblock amplifier, a wiring kit and a set of RCA leads to run it.

The RCA leads plug into the SUB output RCA sockets on the back of the headunit.

The OEM speakers in your car will not be of great quality, so it would be wise to change them. If you do, you need to buy speakers that have a rating of no less than 90watts, any thing less and they will sound distorted.

Any car audio shop will be able to help you select the right size and rating to suit your car. They may even fit it all for a charge.

Hope this helps

Please remember to rate.

Aug 16, 2008 | Pioneer DEH-P80MP CD Player

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Subwoofer amp problems

I would suggest 16-18 gauge wire it will handle the 500 watt max u will b running

Apr 18, 2008 | Kenwood KDC-MP235 CD Player

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