It is impossible today to determine sound quality of speakers from specifications. The flaws in speakers which limit clarity or cause listening fatigue do not show up in specifications or in most cases even in elaborate acoustic measurements. My designs are based on decades of learning what goes wrong with speakers that correlates with unpleasant listening experience and to avoid those problems. From a positive point of view, it is important to reproduce the entire range of what human hearing is capable and to produce that uniformly in three dimensional space.

For what it is worth, I do include a set of specifications.


Sound normally spreads in three dimensions, at all frequencies. Therefore, so does our speaker, unlike many others.

Speakers should not sound like a bell; hence, the woofer magnet is encapsulated, damping material is inside the cabinet, the tweeter coil is damped by a magnetic liquid, cabinet walls are thick and braced, edges of the cabinet are rounded.

Phase Response
As a function of frequency, the rate of change is minimized through careful control of reactive components in the crossover, woofer, tweeter and cabinet.

Room Acoustics
The speaker is designed to slide the sound smoothly into the room from its assigned position, without causing resonances or interferences.


Frequency Response
40Hz to 10,000 Hz ± 2 dB
30 Hz to 17,000 Hz ± 4 dB
20 Hz to 20,000 Hz ± 6 dB
13½” wide; 9” deep; 22” at front, 25” at rear
Power Maximum: 50 watts continuous
Power Recommended: 200 watts recommended for handling transients
Rated Impedance: 6 ohms
Minimum Impedance: 4 ohms
The woofer is designed mechanically and electrically to roll off naturally, no additional filtering is necessary from the crossover. A two pole network adds to the natural rolloff of the tweeter, additional components equalize the tweeter response to achieve maximum flatness in the prescribed room location.
Frequency: 1600Hz,
Woofer Slope: 24 db/octave
Tweeter Slope: 24bd/octave
Driver Complement
Woofer: 6.5” with ±¼” linear travel
Tweeter: 1” soft dome type with magnetic cooling fluid
Shipping Weight: 35 lbs.