20 Most Recent Cerwin Vega LW12 Subwoofer Questions & Answers

Polk Audio PSW505, BIC America F12, Hsu, SVS, Outlaw, Axiom Chane Subwoofers

Cerwin Vega LW12... | Answered on Mar 19, 2014

http://www.parts-express.com/cat/subwoofer-plate-amplifiers/332 Subwoofer Plate Amplifiers

Cerwin Vega LW12... | Answered on Mar 19, 2014

The phase switch only reverses the ground and hot to the speaker in case its bass is out of phase with your other speakers as you perceive it at your listening position. You don't want one speaker in the room sucking the bass from you while the others push it.

If the LW12 is being driven by speaker level (*) from your receiver you could reverse the phase of the speaker wiring coming into IT then recalibrate everything again for levels and evaluate the overall bass response.

* If that is the case, try looking at the speaker wiring coming into the sub, since it would also drive your front speakers, right? Maybe there's a wiring issue aggravating the phase switch selection. Make sure to turn the volume down or turn everything OFF before manipulating speaker wires.

Cerwin Vega LW12... | Answered on Jul 10, 2011

If you are certain that the problem is not with the speaker(s) the problem then sounds like an issue before the amp.

Did your friend have this issue? If yes, the problem is with the built in amp/crossover. If no, there is some kind of problem in your location.

The amp will not produce the popping sound even if the the amp has a problem electronically. The problem could be improper voltage, line noise, wire resistance or a grounding issue. The first two would be eliminated by using a line conditiner with a built in surge protector. The resistance and grounding issues would be associated with the wire connecting the sub to your electronics. It could be simply the cable connecting the sub has an issue, try swapping it with one that you know works fine. Are you using in wall wiring? Try using like stated above, a short known good patch cable. Sometimes the wire of choice during a installation will not work for that amp. Try taking that in wall cable out of the loop. I have seen just this problem in the past due to the type of wire used. A low cost way to eliminate the voltage issues is to try a different source of electricity by taking the sub to a friends house and see if you can reproduce the problem there.


Cerwin Vega LW12... | Answered on Feb 22, 2010

It should have a small fuse on the board between the transformer and the board. Check that first. If it is good see if the transformer is putting out any voltage. Two easy fixes that can be done in house...

Cerwin Vega LW12... | Answered on Jan 31, 2010

It sounds like the internal amp has failed. You could look inside and see if any of the main semiconductors has failed or blown apart!

Cerwin Vega LW12... | Answered on Dec 15, 2009

You have several ranges of options.

1) Contact Cerwin-Vega customer service: http://www.cerwin-vega.com/

2) Do a google search on "cerwin vega speaker replacement". You will find companies both that offer repair or repair kits (e.g., www.simplyspeakers.com) or sell replacements. Contact them - they have the expertise to tell you which of their products are most suitable for your model.

Cerwin Vega LW12... | Answered on Nov 01, 2009

I am an Electronics Tech and just finished repairing a LW12 for a customer. It also has the HUM. IF I place a finger on the RCA input and another finger on the heatsink..(black metal plate at the back) then the hum goes away. I did notice that Cerwin V maunfactured this older LW12 unit with a 2 prong cord. I personally own a newer CV 10" sub, 3-prong and has never had a problem with it and it has awesome Bass. So for my customer...I am thinking I will add a 3-prong cord. and see what happens.....

Cerwin Vega LW12... | Answered on Mar 18, 2009

Same thing is happening to my Cerwin Vega 18" sub. Can't find solution at all. Guess I will have to buy a new sub.

Cerwin Vega LW12... | Answered on Jul 31, 2008

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