Acoustat servo amps ??


hey!
I'm looking for any info on acoustat servo amps for monitor III speakers. right now i have the transformers (not the medallion) and love them w/ my arc vt100mkII. however i keep hearing that the servos will bring these to a new level.

i'm debating on whether or not to go for the servos and sell my arc.

mostly i listen to jazz 50% lp, 50% cd and am using the speakers with a vandersteen 2wq sub.

anyone have thoughts? is it worth it? how much can i expect to pay for the servos? where should i look? should they be upgraded and how? who works on them...etc.

how about a passive pre w/ these? recommended?

im also interested in thoughts on the model IIIs compared to the other models... 4s, the 2+2s, X, spectra 1100, 22, etc.

any info is appreciated.

thanks in advance
kublakhan

Showing 1 response by drrasta

I owned the "monitor III" speakers with their "servo-charge" amps for 18 years, having purchased them in 1979. The "model III" succeeded Acoustat's attempts at selling a tube-powered speaker. Acoustat offered a couple upgrades over the years to the amps that involved replacing capacitors, I believe. They definitely helped on the low end and with clarity. Joe Curcio offered a $2000 mod to the amps that involved replacing part of the diode circuit with tubes. The power tubes were 6hb5's, which are unique to this amp, so may be getting a bit hard to find. I sold my speakers a few years back for about $650. If you're lucky you might find someone selling them locally. They were a great pair of speakers, but had their own issues and quirks.