When my sub is not in use it makes a strange burbling noise
which doesn't seem to come from interference - could it be the power caps? theres 2x 10000uf and two smaller 300uf near the outlets. also it does sound wooly and not tight but that could be my room - it's only small! The phase shift pot minimises it at 180'. I don't know how old it is-? bought it on ebay a year ago. It started making the noise two months after i bought it. serial bar code is 992071g. I hope there is a solution, can you help?
You can simply and easily replace 3 capacitors on the main amplifier board (c58 - 47uF 63v or 100v) + (c52 & c53 - 220uF 25v) but stand them away from the board on the length of the capacitor leads to prevent them from absorbing heat from surrounding hot components (with heat shrink tubing to prevent shorting)
these are usually the cause of most problems with KEF PSW subs, as for it sounding wooly, this is just the way it is, mine is the same.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Strange noises can come from your amplifier or the sub itself. The most likely cause of the strange noise is the speaker just before it dies! If you have been using the sub-woofer at high volume levels then you probably have damaged it. Try testing the sub-woofer using a multimeter(on ohms setting) it should give you a reading from 8 to 4 ohms. Sometimes they may give readings as low as 1 ohm. When testing the speaker/sub you should hear a soft scratchy, thumping or clicking sound. This indicates that the speaker may still be working. If you don't have a multimeter try a 1.5 volt battery (say a AA), DONT USE HIGHER VOLTAGE BATTERIES they may damage the speaker! You will hear a clicking, scratching etc sound from the speaker which may indicate that it is still OK. If the speaker seems OK the problem may be in the amplifier, which I suggest you bring to a professional repairer.
When buying speakers and amplifiers make sure the power handling of the speaker is equal to or greater than the amplifier output power. This should stop speakers from getting damaged. Make sure the speaker and amplifier specifications are rated in the same manner ie RMS PMPO Peak. A 100 Watt PMPO speaker will not survive the output of a 100Watt RMS amplifier!
it sounds like the sub is rubbing in the voice coil.
put the speaker in upside down to what it was before.
sometimes that extra bit of downward pull is enough to offset the error.
There are speaker reconing experts out there but it is cheaper to replace the sub itself.
the sub can be replaced for sure.
Throughout my experience with Toyota's I have found that several times the hubcaps have made some weird noises. Try removing your hubcaps and driving your vehicle. If the noise still persists please let me know and I can ask u some questions and try to help you with your problem.
If your sub or its amplifier is placed too close to the transmission box, this situation can cause interference. I suggest that you buy a ground loop isolator or an RCA filter. If the problem is about grounding, then you have to buy a ground loop isolator. Otherwise, an RCA filter can solve your problem. First of all, the problem has to be diagnosed.