Question about Solid Audio Formula Series F21 2-Channel Amplifier Car Audio Amplifier

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Solid audio f29 2 channel

I purchased this amp and it came damaged. I belive that there was water damage to the pwer board. It is a seperate pleice but I belive I need a new one. I have been unable to find anything about this company. Any help would be great

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Mike Ryan

Mike Ryan

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With the no name amps theres not alot you can do. Even with the high end amp companies you cant get much info and parts out of them.. If you happen to be in the chicago area i do run a small repair shop and i would be happy to take a look at it and see if theres any way to repair it....

Posted on Aug 18, 2007

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I have a behringer pmp3000 which has stopped working on channel A. I know what the problem is and have sourced a replacement board. Is it still possible to use it as a mixer if the amp section is...
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If I'am powering 2 Peavey 4 ohm bass binns, then linking, from the base bins, 2 15" 4ohm cabs, should my selector switch be in main L and R mode ,or Bridge mode for maxium output and performance,...
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This is a VERY unsafe configuration with this mixer. ALSO please read my tip on here in regard to PMP mixer grounding hazard of the A channel when using Speakon to 1/4 inch cables.

Frankly, forget about maximum performance unless you want to risk blowing your mixer...

If I were you, I would put the two 15's in SERIES as 8 ohms on one of the channels and the Peavey's in SERIES as 8 ohms on the other channel.

You would be well to heed this warning as I have repaired a bunch of these units. Be careful of any poor speaker connections as there is an insulation breakdown problem in the power amp circuit board if a speaker becomes intermittent. If something fails DO NOT replace the pwer fuse as you will do more damage.

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I have Mackie mixer cfx12 all the channels work except for channels 2 & 3, I turn the pre amp trim pot all the way up but no input is present, I also tried solo PFL for these two channels and no...
I suspect one of the upfront IC amps has been damaged. This can happen if people power the mixer from a receptacle that is different from where other connected equipment is powered such as amp. For example, mixer is at one end of the hall and other inouts such as an output of a guitar amp is plugged in. If a ground fault or spike occurs, teh ground bounce can exceed the common mode voltage of the input amps.

In your case, the inpout amps are discrete transistor types.

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