I'm using mine as a PA and driving a dean markley 1x10.  I can't vouch for a 2x12 or 4x10.  I think RDV is using his on a 2x12 though.

I think the most failsafe fan solution would be to have a heatsink that is just barely large enough to use passively, then put a fan on it.  This way, if the fan dies, you can still limp along till you fix the fan.  And yeah, a big sink with a fan on it would look cool.  I didn't bother on mine since it is so huge, plus I wanted a simple solution.  And there is nothing more simple for a heatsink than just grabbing the biggest one you can afford and bolting a chip to it lol.

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Will do.  I just have to get my brother to replace his old beater with a nice one first.  The electronics of wahs are relatively simple, the hardest part is normally getting the physical foot action working.

I have no idea how to get that tone, but I'm glad I'm not the only one that wants it.  I love money for nothing.

$20!?!?!  And it works?  Ooooh, thats a steal.  Just throw in a red coat and you'll be good.

Oh, and both of those amps up top are mine.  The reason for the inefficient huge monster is because it was all I could find on eBay for a sufficient heatsink at the time.  I haven't changed it because I like the comments I get when people see it 

We know what you are talking about, but there are several problems with fans in guitar amps. 

1.)  You need to get power to it (not a huge deal)
2.)  They make noise, and who wants fan noise in their amp
3.)  If not done properly you will lose your chip from overheating
4.)  Even if done properly, if the fan fails you will overheat your chip
5.)  Big heatsinks look cooler (this is the most important one)

And yes I know about using fans on CPUs and controlling air flow.  I have a dual 2ghz G5 powermac that (if it would let you) run with the case open it would overheat and toast it's CPUs due to improper (or non existant in certain areas of the case) air flow.

* Ok, so I was kidding about #5, but it is true.  Who wants a girly CPU fan in there when they can have a monster like I have on the back?

I've never seen it used for anything other than subwoofer boxes, and normally only sealed ones at that.  I suppose it could work for guitar cabs though.  I would consider poly stuffing, easier to work with (arguably) and its $1 or so for a good size bag at walmart.

**edit**
I should note that I no longer shop at walmart due to how they treat their employees (low wages, no benefits etc).  So check out a craft store instead 

The first one does, maybe poorly, but it does.  I drilled 16 holes in the bottom, then 9 holes in the top to allow cold air to come in the bottom and hot air to rise out the top.  It works, trust me I've never had it over heat.  That amp is my computer speaker amp and I've had it on 3/4 volume (really really loud btw, I had no neighbors at the time  :tu: ) for 2 hours or so and no problems.

This is what I have left:

4 x amp+power boards (no chips, resistors or caps, just the boards)

Any of the boards are $2 a piece, if you want more than one it will be $0.50 more per board. (So 2 boards would be $2.50, 3 boards $3, 4 boards $3.50).  And if you want it shipped priority, add $3.

DreamSeller, your kit is in the mail!   :tu:  Should be there in 4-6 days.

I don't have any kits left, if you want a board, look up to reply 102 and it lists what I have for what price.

RDV, the power boards are in the mail.

Thats what I was thinking!  It'd be easy AND cool.  Something that doesn't always go together.