Sound-Lab A-1 electrostatic loudspeaker Specifications

Sidebar 4: Specifications

Description: Full-range, transformer-coupled, electrostatic loudspeaker. Frequency range: 28Hz to beyond 20kHz. Nominal impedance: 8 ohms. Sensitivity: equivalent to 88dB/1W/1m at 4m. Minimum amplifier power: 100W. Maximum music power: 450W. Bias power-supply input: 117/220 VAC, 50/60Hz.
Dimensions: 81.24" H by 35.5" W by 10.5" D (panel), 25" D (base). Weight: 185 lbs each.
Price: $10,950/pair in standard wood finish (1992). Accessories: "Acoustic Wave Delay Panels" (wings), $1242/set of 4 in oak, $1566/set of 4 in walnut; "SALLIE" BWA-1 Back Wave Attenuator, $1000/pair. Approximate number of dealers: 32. Warranty: 3 years on electrostatic panels, 1 year on electronic interface.
Manufacturer: Sound-Lab Corporation, Park City, UT 84060 (1992); 153 N 400 W Street, Gunnison, UT 84634 (2013). Tel: (453) 528-7218. Web:

Sound-Lab Corporation
153 N 400 W Street
Gunnison, UT 84634
(453) 528-7218

remlab's picture

...issue I ever bought. I never forgot about the Mylar thickness issue. I remember saying to myself, "what if John hadn't tested the speaker?" There would have been a whole bunch of screwed up A-1's out there, probably to this day. That's what made me realize how important the testing of all equipment is. How often has equipment malfunctioned or been out of spec  during Absolute Sound reviews without them even knowing. Obviously, having measured A-1's previously did help in this case.