Acoustat Spectra 1100 Speakers
Complete speaker system, modified for a much better sound, and in great condition. Includes
both right and left speakers, two bias transformers and the original manual.
I do not have boxes for them and they weigh about 65 pounds each, so they
are available for local pickup only.
The Spectra 1100's shown setup in my living room, with the ARC amps
peeking out behind them.
The Solen Polyproprolene capacitor, wiring, and vibration control upgrades resulted in an amazing improvement in these fine speakers sound quality Detail, imaging, and transparency are in a whole different class now.
Isolated interface circuit board, box, and panel assembly with sorbothane strips and rubber grommets. Built an MDF amp stand to fit on top of Interface and woofer box.
Rear view of Spectra 1100 woofer enclosure with electrostatic Interface box on top
Spectra 1100 woofer box
Replaced woofer crossover inductors with Alpha Core devices and bypassed aluminum spacers in the signal path with heavy gauge copper wiring. Disconnected poor internal connection to electrostatic interface.
Spectra 1100 electrostatic panel. Note good condition of grill cloth.
Spectra 1100 upgraded Interface electronics
Replaced electrolytic interface caps with Solen PP types. Added new input connectors and wiring. Cleaned up the boards and dressed wiring.
From bottom: Modified Acoustat woofer box with crossover panel, electrostatic interface box, homemade amp platform. D-52d Amp, steel cube to sink stray flux.
Wire to woofer is Tributaries 12 gauge stranded, electrostatic interface is connected with a short section of Goertz MI 1 copper ribbons. Unused amp input is protected with a Cardas cap.