I have a Peavey Impulse 200 speaker. The 12" speaker stopped working, but it and the circuit board look fine. What do I check now?

Michael; press the helpful button and check the links below for CS 200 X Amp.

Peavey Diagrams Schematics Service Manuals

Peavey Schematics Circuit Diagrams


http://www.clubdediagramas.com/archivo/audio-equipos-de-musica-amplificadores-reproductores-etc-a7/peavey-m168

sounds like an internal connection problem. open access panel and check the solder connection is not broken or loose. Be sure the metal mesh jacket is not touching the lead wire as that would cause a scratchy noise and feedback, or maybe near the internal cable causing feedback

I assume you mean the Pr-12RX passive? That seems wrong to me, too. Put an ohm meter across the terminals of the horn driver and the woofer seperatly to see which, if either, is blown. If they're OK, look for a bad solder joint on the crossover.

ya clipping it?????

Across the diaphram you should be reading about 8 ohms. it sounds to me like it's blown.However,if you think it'ds thre crossove, take it out and send it to Peavey. They do good , fastwork.............................................................

Testing the driver with an ohmmeter is incomplete test. Sometimes the magnets break off the drivers rendering no sound. Sometimes the voice coil shorts and if you don't interpret the ohmmeter readings correctly you can overlook a faulty driver. Remove the horn and look for damage such as lost magnet from the back. Also the peavey cabs have a protection circuit so if you did not try another speaker to the same wores going to the driver, it may be the Polyfuse on the protection circuit or other components.

LOUD SPEAKER BURNED REPLACE
FREDDY
TIGER ELECTRONICS LTD
ISRAEL

Inside the headphone jack is a built in switching mechanism. It is there to cut off the sound to the speaker when you are using headphones to practice quietly. For some reason or another it seems as if this is no longer working correctly. One of the causes of this can be bad solder joints on the circuit board where this jack is located. Another cause is a failure of the jack itself. If you are capable, Take the circuit board out and have a look. Hope this helps.

Check for impedance ( resistance) in ohms on the speakers disconnected from the circuit using a volt/ohm meter. I think the woofers are 8 ohms and the tweeters are 8 ohms. Also check for bad solder joints where the jacks are soldered to the circuit boards.

Horn and speaker combo cabinets have an electronic component called a "crossover". The horn and speaker both work off different electrical signal frequencies. If you can take off the back, or get inside by pulling the speaker, check for a small circuit board mounted inside the box or on the speaker or horn. Check for a broken wire or loose connection of the crimp connectors.

A common problem with speakers, often the cone, or paper part of the speaker will come un-glued or separated from the magnet "voice coil". This happens when played too loud, when it's commected to the wrong impedance, or if the signal was shorted and "overdriven" (usually sounds like an awful buzz that's really loud).

Always make sure your output impedance matches the impedance of the speaker. Most auto stereos are 4 Ohms. Older home stereos are typically 8 Ohms. Musical PA gear varies between 4, 8, and 16 Ohms. Peavey gear is typicall 4 Ohms, but some older models are different. The Ohm rating is the amount of the resistance in the circuit. If your speaker is 4 Ohms and you plug it into an 8 Ohm circuit, you can destroy the speaker and sometimes the crossover circuit board.

Good Luck.

Jim
[email protected]
Phoenix, Az