Acoustat servo amps ??

My luck has been with the model X. I like the sound and value so much, I bought a second pair. Besides upgrading the tube recipticals, I have left both pair in original condition. Some time back, returning home, one amp was making a terible noise. The Antique Radio Store fixed me up. But now, I feel better killing the power when they are not being used. Also I found out that they must be grounded. I was using one of those three to two plug adapters. Doing this lets the groung charge build up. My cloth was worn on one pair of the X's. No luck finding the same cloth until I bought a pair of Klipschorns. Noticed the cloth is a match and still avalible from Klipsch.

waveriding, thanks for the klipschorn idea. i'll probably do that. there is a company still making acoustat socks for virtually any model but they dont have a great selection of colors. For your records just in case you ever get a cat keep this handy: "The Upholstery Co" in mesa arizona 480-898-9521

I think Plato may be a little confused, or I do not understand what he is saying. Spectra's include 33's and 3300's, Mdl. 3's are not spectras. I have Mdl. 3's and 3300's. I am using a slightly modified Moscode 600 amp to drive them. I intend to upgrade it to a 500 watt a side amp, and believe that will finally satisfy the Acoustats. If you have a contact at Rockford who can get transformers, I am considering bi-amping, but would need 4 more Spectra transformers to do so....

Thanks,

Lou

Dennis, a mint pair of Monitor 4's sell for $550.00 to $650.00, look elegant, and will sound similar to your 3's. That means the servo amps are going for about $1000. Not bad if they are also mint, but not a bargain. If you can pry the amps away without the panels for about $700-$800, that's a bargain. Obtaining 6HB5's is not a problem, Michael Percy and Caddock will have the other parts you'll need.Ed

Kubla,

To determine which panels you have you need to look at the wires coming off the panels. If they are the very early panels, the stranded wire is relatively coarse and silver in color. If you have the OFC panels the wire will be fine copper stranded. The 5-wire panels use the same type of OFC stranded copper wire, but obviously there are 5 wires per panel instead of 3.

Lou, I never said that the model 3s were Spectras, so perhaps you are confused. BTW, The Spectra panels are the same as the late 5-wire non-spectra panels except that they have high-voltage resistors wired in to limit the high frequency reproduction to a more narrow section of the panel. In theory this seems like a plausible approach but I'm not sure how great it worked in actual practice. Some say the late non-Spectra panels are more transparent because the signal isn't being routed through resistors. So it would seem there is a trade off between transparency and dispersion at play.