Search:

You said it, 60 lbs.

So here is your dual-use transformer/amplifier mounting chassis (I just saved you the cost of a case!):
http://www.signaltransformer.com/Data/Datasheets/DU-SU.pdf
The DU-2...

Hey, Clark, it is always nice to see that dastardly minds think alike . . . bwa ha ha

I'm sure I've got a transformer that would be ideal sitting around here, but one thing you might toy with --...

http://shinshu.fm/MHz/06.94/images/JZ0qfZAc.jpg
I'm interested in an amplifier for a 5-inch 16-ohm field coil fullrange driver like the one shown above. (You can see the field coil power connector...

Is Amp15 the best choice for a 16-ohm fullrange speaker? (I.e., single driver, no crossover) (Any 41Hz amplifier would have enough power for my needs; I'm looking for best matching with...

Aren't the leads on those caps WAY too long? Isn't there any way to shorten those leads?

Yes, you can hook up just one speaker to the amplifier without hurting anything. 16 ohm speakers should work without any problem, but 8 ohms or 4 ohms are no problem either.

One thing I would really like to know is if one can expect better sound quality from the more expensive and more difficult to build (due to the need for toroid winding) versions, assuming that the...

Assuming good quality of construction, which amp is likely to have better sound quality -- Amp 3 or amp 32? Thanks!

I hope you don't mind my encouraging you to take this question elsewhere, but a great place to ask it would be a forum more directly concerned with your topic, such as "Cult of the Infinitely...

The higher efficiency the better! You might try a fullrange driver in a DIY enclosure. This site is very interesting: http://www3.ocn.ne.jp/~hanbei/eng-intro.html

And this speaker is also...

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7556983345

These seem to be about the right size for AMP2.

I am also planning to Litz my toroids when I eventually get around to assembling my two AMP3 kits; however, in all honesty I am not expecting it to make an audible difference one way or the other. I...

Oops, I just noticed my mistake. Sorry, what matters in the end is the inductance, not the impedance. It is the inductance that has to "measure up." If any substitutions of wire or cores are made...

I note this company sells even tiny quantities online, but they don't list the most desirable (for this application) ui=26 or lower (online catalogs mention values as low as 14) toroid cores. They...

You might also want to try MPP toroid cores; see my post and Jan's reply here:

http://www.41hz.com/Forums/topic.asp?TOPIC_ID=20&whichpage=2

If I recall correctly, you need about 100 strands at that gauge. That means you should get two of the 30 strand and one of the 40 strand spools, and twist them together. You might also try 30 x 3 and...

That would be "borderline"; you may have to try it to find out. Speaker impedances vary with frequency and 6 ohms is simply an approximation. It also depends on a few other factors, including how...

Below I provide links to two different threads, each discussing power supplies for the small amps (AMP3/AMP6). Am I missing something here? They seem to be giving contradictory advice . . . please...

If Jan's statements about the power requirements of this amplifier are to be taken at face value, then even a 1A P/S is "overkill." Not that a higher ampere rating will hurt, of course . . .

I should think you ought to be able to power up about 50 of them, if I read your post correctly. So yes, four would be within the capabilities of the P/S.

I should think you ought to be able to power up about 50 of them, if I read your post correctly. So yes, four would be within the capabilities of the P/S.

Toroid core question --

I am looking at MPP (MolyPermalloy Powder) cores to substitute for the T60-2 iron powder cores in the AMP3 kit, and I see that for a given size, there is a range of choices...

I have a few 12V batteries that weigh about 300kg each, if anyone is interested . . . :D

I have been seriously toying with the idea of building AMP2 to drive a pair of subwoofers. I am waiting to hear from my woofer mfr. about whether I can use this amp with his woofers, as there is...