Question about Amplifiers & Preamps

4 Answers

Sony AMP/Subwoofer Problem

Hello, i was wondering if i could find some help here, i have a sony amp and sony subwoofer, for about 1 and a half years now i had no problems with this combination, but lately everytime i play music, a game, a movie, the bass of the subwoofer will cut out, then it will come back in, but it never happens in the same spot or with the same song, it just happens randomely. I'm not sure if the problem is the sub or the amp. Others speakers connected to amp do not have any problems, although the subwoofer has a specified plug in. I have read places that maybe the amp gets to hot and causes this, but that cant be the case because it hapens right away when the amp is turned stuck on this problem, the warranty is done, i just need to know a good direction to go, do i ned to replace some something inside the amp??? or sub?

Thanks so much for you time!!

Posted by on

4 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer
Re: Sony AMP/Subwoofer Problem

For me it,s the amplifier had a problem, if your amp is a 4 channel output the rear 2 channel is for sub woofer driver. if it is a PWM amp and you laod a 2 omhs into sub output maybe that's the cause to burned transistor output because 2 omh stable is not ideal to used it's always 4 ohm to avoid some trobles

Posted on Oct 01, 2011

Re: Sony AMP/Subwoofer Problem

TL 494CN ic equivalent numbers

Posted on Sep 25, 2008

Re: Sony AMP/Subwoofer Problem

There are many parts inside of the subwoofer box that can cause this problem. First you will need to remove the subwoofer speaker from the subwoofer box completly, there should be no wires from the subwoofer box attached to the speaker. Take any single one-point five volt flash light battery (1.5 volt flashlight battery) and connect the side of the flashlight battery that mark minus (-) or negitive to the side of the subwoofer speaker terminals that mark minus (-). Next connect the other side of the flashlight battery that mark + to the other side of the subwoofer speaker terminals that mark + (plus or positive). When the + wire of the battery make contact with the + terminal of the subwoofer speaker, the subwoofer speaker paper should move forward away from the speaker. This forward movement of the speaker means that the speaker is good and that it is also in phase. Next you will need to connect the - minus and the + plus wires from the battery terminals permanently to the subwoofer speaker terminals. By removing and re-connecting the two wires from the flashlight battery to the subwoofer speaker terminals which is the - minus wire from the battery to the - minus speaker terminal and the + plus wire from the battery to the + plus terminal of the speaker, the speaker paper should move forward and stay forward and when the speaker move forward try moving the subwoofer speaker paper forward and backwards two to three times you should not hear any carckling coming from the speaker. Make sure that when you are moving the subwoofer speaker paper forward and backwards the wires on the battery and on the speaker terminal are not moving. If you hear any carckling comming from the speaker when you are moving the subwoofer speaker paper. THIS MEANS THAT THE SUBWOOFER SPEAKER HAS AN INTERMITTENT PROBLE OR THE VOICE COIL WIRE IS BROKEN. Check all subwoofer wires, plugs, jacks and wire connecting points inside and outside of the subwoofer box for good connection. When the speaker is playing it will vibrate the box. This vibration can cause wires, plugs and jacks connections inside and outside of the subwoofer box to come loose or not making proper connection. A loose connection in side of the subwoofer box or outside of the subwoofer box can cause this problem. Make sure that electrical power cord that brings the electrical power from the wall outlet to the subwoofer jack is good and it is also a good idea to replace the electrical power cord. Make sure that the electrical power cord is push all the way in, into the subwoofer jack and make sure that the plug on the other end of this same subwoofer power cord is push all the into the wall outlet.If you use an electrical extention cord to bring power to the subwoofer you should use one that has a ten gauge wire or one that is large. You can find a good electrical extention power cord in a local hardware store or you can locate a good electrical power extension cord at a radio shack store. This electrical extention power cord must able to carry 15 amps of electrical current continously. A small electrical power extention cord can give your subwoofer low voltage which is any electrical wall outlet voltage which is below 108 volts. Proper electrical outlet voltage should be between 110 volts and 132 volts. The amplifier inside of the subwoofer box could have loose transistors, I.C.,s resistors,capacitors, volume control adjustmens and even a broken or losse copper trace which is use for carring the electrical voltage and current. If you check every thing that I have mentioned above, then the amplifer inside of the subwoofer box is defective or broken. MAKE SURE THAT YOU REMOVE ALL THE ELECTRICAL POWER FROM THE SUBWOOFER BOX BEFORE YOU REMOVE THE SPEAKER!

Posted on Apr 04, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert that hasĀ over 500 points.


    An expert who has answered 200 questions.

  • Expert
  • 317 Answers
Re: Sony AMP/Subwoofer Problem

It is probably the tweeter, inside the Sub. it's the small ceramic disk between the cone magnet, and the speaker. id this thing is cracked or broken, this will cause the problem. if this is not it, then it is a problem with something in the wiring, and the only way to rectify it is to buy a new sub. Sorry due :(

Posted on Jan 26, 2008

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

On my Technics SU-G90 where do I connect the subwoofer

Some amps have a single RCA socket for a powered sub. If it has not got one of these then the amp has no output for a powered sub. If so then you can only use a none powered subwoofer, which will connect via the speakers of the amp, see the subwoofer manual for how to do this.

Feb 18, 2014 | Amplifiers & Preamps

1 Answer

Hi, I have the Technics SA-AX530 amplifier and I was wondering if there is a way I can turn my subwoofer up through the amp? Can't find anything on the remote, please let me know if there is anyway I can...

Hello, I searched all thru the service manual of the Technics SA-AX530 Receiver, and I have to say that there is not any way to turn the volume of the subwoofer up (or down) alone. The only control of the sound that affects the subw. level is the BASS control, but it controls also the bass at the speakers too.
Good luck.

Oct 29, 2013 | Amplifiers & Preamps

1 Answer

What port do i plug the subwoofer into

Look on the back: "Subwoofer Low Pass" for a powered subwoofer or amp driving a subwoofer. Your subwoofer's manual would suggest how to conenct it.

Jun 23, 2011 | Yamaha DSP-A1000 5-Channel Amplifier

1 Answer

Cant get subwoofer to work on my sony amp. speaker works on other ports. ive turned on subwoofer port and up the level to max but no sound nothing.

Never use maximum volume for troubleshooting. The errant switch or control that you eventually find and change will suddenly release the amp's full power and you'll destroy your speakers. If a signal isn't audible at 1/2 volume it's probably not there.

A specific model of both would help in the diagnosis. Most modern AVR

Feb 06, 2011 | Sony Amplifiers & Preamps

1 Answer

Ftx-2001 Ashley amplifier with XR-1two way crossover. I am trying to connect from my EQ (2-1/4 jacks) into my amplifier, do I connect mt left & right out of my EQ into the balanced input XLR. Not an...

The XR-1 is a 2 way crossover. Depending on the resistor networks, it can be anywhere from 50hz to 5khz. If the packs are marked 153, It's 750HZ, if they're 103 it's 1.2khz if 104 it's around 120hz and 154, 80 hz.
The hi side amp is ch1 the low side is ch2 The amp can be configured as a subwoofer bridged amp , a subwoofer with full range dual ch. You can't make it into a stereo amp with out the obsolete stereo input pack that replaces the XR-1 crossover

Dec 28, 2010 | Ashly FTX-2001 Amplifier

1 Answer

How do I connect a subwoofer?

the amp should have a sub out if not ,you can check if the sub can take a speaker level input so that you can connect one or both speakers to the sub and it will take the signal from there ,please send the sub model no ,i can track the inputs provided

Jun 23, 2010 | AudioSource AMP-100 2-Channel Amplifier

1 Answer

Need to know how to hook up a subwoofer to an amp

thats easy if you have posted the specs of amp and sub.are subs 1 2 4 ohm? what is the power rating of both amp and subs in 1 2 4 ohms.u need to post some info to get help.:]

Aug 27, 2009 | Sony Class AB 600W Bridgeable 4-Channel...

1 Answer

How do I connect a Polkaudio powered subwoofer (psw 125)

Connect a set of stereo RCA cables from the 'Output 2' on the Hafler to the line imputs on the Sub.Turn on the '1+2' output switch on the Hafler and rock out!

Dec 16, 2008 | Marantz PM7200 2-Channel Amplifier

Not finding what you are looking for?
Amplifiers & Preamps Logo

Related Topics:

362 people viewed this question

Ask a Question

Usually answered in minutes!

Top Amplifiers & Preamps Experts


Level 3 Expert

4518 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

66604 Answers

Are you an Amplifier and Preamp Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides