model 3

A semi full-range electrostatic speaker employing the Beveridge acoustic lens system. The Model 3 heralded the introduction of an entire new series - Models 5 and 6 - all based on the same elegant, tubular cabinet design. In contrast to the Model 2, the 3 boasts cylindrical cabinets, 6' 6" tall, each housing the ES units. Two additional woofers cover the lower acoustic range. A modified lens design retains the full 180 degree, cylindrical-front waveform dispersion. A further increase in sound slot width and a correspondingly larger throat to the wave guides allow a further increase in total SPL.

Unlike previous models, the 3 is a passive speaker, giving the user the choice of power amplification. The cylindrical-front waveform is created by means of the acoustic lens and the vertical narrow line source at the front. As with all Beveridge speakers, the ES panel's rear radiation is totally absorbed within one sub-enclosure in the column. This, in turn, is entirely segregated from two other sub-enclosures that house the top and bottom woofers.

Two additional 10" woofers/channel, covering the 30-200 Hz range, radiate upward and downwards, creating a perfect polar sound dispersion with no phase shift. A built in, bypassable cross-over network allows for a variety of bi-amplification modes, but the ES units are protected at all times by a fixed, non-passable high quality oil capacitor.

Model 3's passive equalization is provided via a separate unit connected between pre- and power amplifier or into the pre-amplifier tape loop. It achieves similar tonal balance to that of the Model 2 - and does so to a remarkable degree - by simulating the latter's sound slope. It corrects a very mild peak around 10 kHz and provides bass boost/cut control.

Model 3 passive EQ unit