Question about Audio Players & Recorders

3 Answers

Jbl sub 135 motorboating b4 warm up JBL sub135 I never heard it called motorboating, but that is a good description of the sound, It's like the sub is trying to output sounds which are not in its range like female newscasters, a conisitant bu-bu bububu-bu -bubu. I do not notice it after it has been on for an hour or so. I got a great deal on this sub at a pawn shop, the sound is great except for this problem.

Posted by on

  • PDnAZ Mar 04, 2009

    I returned the JBL and purchased a Polk. Got home Hooked it up, found it was doing the same thing! Ok, sub was not the problem. It's hooked up to a Visio 55 LCD which has a sound setting called SRS TSHD. I turned it off and the problem was solved.

×

3 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 5 Answers

Turning the unit on without any input signal, the speaker did the pop and scratching sound. I found on the limiter board ( small pc board on the main input pc board) that there is a wire jumper on the back side of that had a cold solder joint. You will have to clean up the glue that was used to hold the wire on the back side of the board. I just replaced the wire with new one.

Look at the +15vdc off of Q117, I moved it to the left side of the pc board and added a heat sink to the unit. The 1 watt resistor created some cold solder joints that you will have to check.

hope this helps

Posted on Jul 18, 2009

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

As Bob has suggested, remove the brown glue on the limiter sub board on the input board, it becomes conductive as it ages. This turns the limiter board into a slow oscillator, causing the loud thumps.
Check for dry joints on transistors Q105 and Q106, on the amplifier board, Also replace the 220 uF 10 Volt capacitor, C130, next to Q106. Q106 gets hot which damages that cap.
(In the sub I was repairing, this cap was only 30uF!!)

Mark

Posted on Sep 09, 2010

  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 5 Answers

Sounds like a possible ground loop problem. Are there anyother cables running on top or along side the sub cable? Also, make sure there is no other remotes or electronics on top of the sub itself.

Posted on Mar 04, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

12 inch sub(JBL) in box with a 500 watt pioneer amp, sounds good with some types of base. would you cut a port hole in speaker box?


riverray1969 it would help if I knew the exact model number of that JBL sub you are referring to. With that info I can provide exact specs.


Basically, you need to build/modify an sub enclosure that is suited for the sub, the music you mainly play, and vehicle tuning. Generally, sealed enclosures will provide tighter bass response and get decently loud. Some would argue that it will give you greater sound quality. A ported enclosure will give you a louder more booming sound. That depends also on where the port is tuned (ex. 32 hz, 36 hz, etc ). You need to make sure that the enclosure meets the sub's airspace requirement as well. A customized well made enclosure is just as important as the sub you put in it.

Oct 16, 2012 | JBL P-1020D Car Subwoofer

5 Answers

JBL sub PSW-D110 hums, and the fuse is blown


here is the manual, I am looking for a more detailed version

Mar 25, 2008 | JBL PSW-D110 Speaker

1 Answer

JBL-SUB135S please i need User Manual


As it is also sold as part of this system, Cinema ProPack 600, this manual should suffice.

http://www.jbl.com/resources/Brands/jbl/Products/ProductRelatedDocuments/en-US/OwnersManual/JBL%20CPP600%20OM%20(final).pdf

Page 37 gets into it. That's all there is to know.

There's not a lot going on in a vanilla self-powered sub. You seen one, you've seen them all.

Jun 28, 2011 | JBL Audio Players & Recorders

3 Answers

JBL PB10 has lost power even though still plugged into wall, any suggestions?


Do you mean like the subs power lights dimming when playing it at volumes it once had no problem playing, or loss in sound, distortion?

Oct 10, 2009 | JBL PB10 Subwoofer

1 Answer

This thing isn't build with jbl speakers! cuz i repire this sub 2 weeks a ago this sub was build by some kind of unbrand chines speakers..so any one know about that..otherwise i heard jbl use onl JBL brand...


JBL is obviously just putting their name on your product. Just the way it is. They put their name on it, but use inferior parts. It is cheaper for JBL to have other folks make the stuff.

Oct 07, 2009 | JBL Encounter 2.1 Computer Speakers

1 Answer

Pb12 makes thumping sound after warming up


Hello there..Thats normal only if your sub volume and the pre amp is turned up..Your amp is the cause of the speaker jump..Turn amp volume sub level down a few and check your wire from sub to amp..If all of that is good is a normal operation for pre amp warm up in sub if level is turn to max..Try unplugging amp freom sub then turn sub on stand alone(just sub outlet plugged in and no wires from base amp plugged in..If sub stops the its the amp making the problem..If it still is there then the pre amp is either dusty on inside or the outlet plug that it is plugged in doesnt have a good ground..Hope these help to solve your problem..Have a great day...

Apr 02, 2009 | JBL PB12 Subwoofer

1 Answer

Thump at the time of shutoff


The amplifier in the sub as with any other amplifier has a capacitor in it. Essentially a battery that holds a charge. When you trun things off such as subs or amps with a powerstrip instead of the intended on off button, the power supply has been cut, but the capacitor is still energizing the unit. So it catches the noise in the line.

Mar 07, 2008 | JBL PB10 Subwoofer

2 Answers

Jbl subwoofer


There is actually some good news.  I had this problem with my PB10s (1 have 2 PB10s and 2 PB12s) It is one of 2 things, the first is that it could be a capacitor and resister combination on the amplifier board (which was the fix for our PB10 with the same problem), or 2nd, the AMP IC, which is not available for the PB12. hmmm

Sep 10, 2007 | JBL PSW-D112 Speaker

Not finding what you are looking for?
Audio Players & Recorders Logo

Related Topics:

2,469 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio Players & Recorders Experts

kakima

Level 3 Expert

102366 Answers

 Grubhead
Grubhead

Level 3 Expert

4852 Answers

The Knight
The Knight

Level 3 Expert

72620 Answers

Are you an Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...