[Ryan Freeland]

http://amptone.com/wallmountspeakerattenuator.htm

Looks like someone else did it. They mount on a wall for stuff like a home stereo system, run about $20.

[thesteve]

from reading that site, it looks like it'll work if you can find one that meets your needed ohms rating.

[Major Tom]

Those "100" watt L Pads won't handle a 100 watt guitar amp. If you use a pretty distorted tone, they won't even handle a 50 watt. Those are the ones I use for mine. Trust me, I have done beta testing. They are perfect for amps like a Blues Jr. or Classic 30 and smaller.

The 100 watt designation is probably for the amp output when used for hi-fidelity reproduction, like a PA. That and the fact there is not a government agency regulating that stuff. If you look at the waveforms for that kind of signal, it is peaks and valleys - the average wattage is way lower than 100. With a distorted guitar signal, the valleys are pretty much gone, and what you end up with is a very steady flow of current; a much heavier duty cycle, and the LPad can't dissipate all the heat generated. Another factor - tube guitar amps I believe are traditionally rated at a reasonably clean output; crank it up to where the power tubes are distorting and from what I have read they will put out a lot more than their rating. I use on in my HR Deville, but I don't do any heavy distortion - mild OD at the most.

One thing you could do with a 50 watter in a 2x12 combo, is use one 8 ohm L Pad per speaker, that would divide it up between 2 of 'em and they should handle it ok. That makes a nice arrangement anyway - it gives a little more flexibility. For larger venues, turn 'em both up. For a little attenuation, like 3 - 6 db or so turn them both down some. For even more attenuation, turn one all the way down, silencing one speaker which drops the SPLs quite a bit, and then attenuate the single speaker as needed. My FrankenPeavey (heavily modded Peavey Bravo) is set up like that. Its only 20 watts, but in the 2x12 with 2 efficient speakers it will blow your hair back. It doesn't look like much but it sounds absolutely great - very Vox-like but with 2 foot-switchable channels and more gain. Yes, it does have 2 different speakers in there....on purpose. One of these days I might re-cover it to lose that old Peavey amp look (ugh), but for now it remains a wolf in sheep's clothing.

[BillSPrestonEsq]

I use an old altair one. Works quite well on my 120 watt tube amp.

[Casey]

other than the maj. tom attenuator, I only have experience with the Tom Scholz attenuator, and used that with a Budda amp and it was simply amazing.