Tom Simmons Memorial Design Number 1





A pair of these sound every bit as good as Tom and I thought they would. The combination of the aluminum cone woofers with a planar (ribbon) tweeter gives a very fast response. They are especially well suited for reproducing musical instruments with a fast attack time such as the piano, acoustic guitar, harp and harpsichord. But extensive listening with a wide variety of music shows they are equally adept with vocals, chamber music, the pipe organ and a full orchestra. Because of their fast response, they are somewhat bright and they have excellent clarity.


SPECIFICATIONS

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On-axis frequency response


Frequency response: 55 Hz to 26 kHz


Driving impedance: 5.3 ohms nominal


Power handling: 60 watts maximum (each ‘speaker)


Sensitivity: 85 dB (1 watt/1 meter)


Dimensions: closed box measuring 23.75 inches tall by 9 inches wide by 12 inches deep.


Weight: 36 pounds each, without the pictured stand.


Construction: 3/4 inch thick medium density fiberboard (MDF) with a 3/4 inch thick 13 layer birch plywood front panel; extensive internal bracing. Metal “T” nuts and machine screws are used to fasten the woofers and tweeter into the enclosure.


On the back of each speaker there is an etched aluminum plate as shown below at approximately full size.


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