High Efficiency Speaker Asylum

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Heil AMT tweets PS4a specs, etc. for DIY

Posted by david.osborne77@yahoo.com on May 17, 2012 at 22:30:36:
I have a couple of these tweeeters that I bought on eBay a couple of years ago. I want to use them in some high efficiancy (I think) speakers that I plan to build to work with some low power (SET, Gainclone) kit amps with which I want to start experimenting (O.K., playiing).

I saw them in an ad stating they're from PS4As. I think I recall also seeing others in an ad stating they were from PS8s, but I wouldn't bet my dogs on it (likr those dogs a lot).

They're the ones with those big, flush-mount, cast meta frames, painted silver, and are about 2.5' x 4.5' (very approximate).

It would be good to know the nominal impedance and frequency range. In a pinch, I can estimate the former by taking a static reading from a multimeter, but I'd rather have the factory stated specs for both to figure a crossover.

Oh, yeah, and efficiancy, so Ill know whether I'm totally barking up the wrong tree using them for speakers to use with SET amps.

If anyone has experiance in using these DIY, I'd love to hear about it--xover and driver pairing successes and failures, etc.

Thanks in advance for any info, tips, warnings, "naah-na-na-na-naah-nah, you shouldn't have bought those dogs", whatever.

Dave Osborne