The A150 is a decent sized speaker- not huge, but wide at the shoulders, yet with a narrow depth of 8 inches. They are of a 3-way design, with a 1" ferro-fluid cooled soft dome tweeter, a 4.5" ferro-fluid cooled midrange, and a 10" low mass, low-resonance, vaccume-formed cone long-throw woofer.
The tweeter and midrange are positioned at ear level- a proper height to achieve realistic musical imaging, and are flush mounted on a wide smooth fascia to control early driver reflections for reduced driver refraction.
The 10" woofer is mounted lower to "couple" with the front baffle and floor, positioned to radiate at a proper distance height and angle with the floor for the best possible bass- in-phase with the woofer's direct output, preserving it's smooth response while raising it's efficiency.
All drivers are vertically aligned, so no worries about offset drivers mucking up the sound.
A mark of detail and quality, the inner grill baffle is beveled to minimize early reflections that can blur the stereo image. The smooth fascia of the speaker along with the countersunk and flush drivers retained a crisp focused image- due to reduced infractions.
The wide-shouldered, narrow design was one of many possible design approaches to minimize diffraction of the drivers. By the speaker face acting as it's own "wall", and being unconventionally wide, there was a reduction of edge-diffraction, and side/rear wall reflection, or so the claims are made.
The A150 was an incredibly successful model, with many units sold. A decent price with exceptional all-around performance.
Frequency range is rated at 36-25,000 Hz =/- 3db from the factory.
The A150 are 8 ohms impedance, and decent efficiency at a sensitivity of 90 db at 1 meter.
The A150 is 32" tall by 8 deep by 16.5" wide, on a 1.5" black pedestal base.
Suggested power - 15wpc minimal, 75wpc recommended (150wpc peak).
Very well written piece.:tresbon::thmbsp:
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