I owned a pair of these back in the early 80's. They were nice speakers, though it was easy to bottom out the woofer on loud bass material.
Kr4 is correct. The control adjusts the balance between the electrostat tops and the cone bottoms. As I recall the crossover between the cone and electrostat elements was around 800 hz, and the nominal impedance of the speaker was 6 ohms. Nominal power handling was 100 watts, though I used more powerful amps than that without ill effects.
Each speaker had a 12v (DC I believe) wall wart power supply. I don't recall the polarity of the plug. I left them powered at all times. They draw almost nothing from the ac line.
The woofer boxes contain the audio step up transformers for the electrostat tops. The speakers provide a fairly reactive load, but I successfully drove them with a Sony integrated in 1983. They are not very efficient.
I think most amps with high end pretensions (e.g. Adcom, Hafler, Aragon, as well as more expensive brands) in the 70-150 watt range capable of driving a 4 ohm load should work. A lot of mid-fi receivers could fit this bill as well.
Let us know if you get them working, and enjoy!
Kr4 is correct. The control adjusts the balance between the electrostat tops and the cone bottoms. As I recall the crossover between the cone and electrostat elements was around 800 hz, and the nominal impedance of the speaker was 6 ohms. Nominal power handling was 100 watts, though I used more powerful amps than that without ill effects.
Each speaker had a 12v (DC I believe) wall wart power supply. I don't recall the polarity of the plug. I left them powered at all times. They draw almost nothing from the ac line.
The woofer boxes contain the audio step up transformers for the electrostat tops. The speakers provide a fairly reactive load, but I successfully drove them with a Sony integrated in 1983. They are not very efficient.
I think most amps with high end pretensions (e.g. Adcom, Hafler, Aragon, as well as more expensive brands) in the 70-150 watt range capable of driving a 4 ohm load should work. A lot of mid-fi receivers could fit this bill as well.
Let us know if you get them working, and enjoy!