Allison Three - Retrotech Audio - Vintage Audio

Pair of Allison Three
Vintage Corner Enclosures

Pair of Allison Three

Vintage Corner Enclosures

If you ever see another pair of these fabulous enclosures and they have functioning bass drivers, they will definitely have been re-foamed. If they haven’t been re-foamed the surrounds will have long since turned to dust. We just had these bass drivers professionally re-foamed - so now these awesome American loudspeakers are working just as they should - and sound stunning.

All drive units are working properly, the cabinets are good and solid and the real walnut veneer is very nice. You can see some white marks on the front grilles. These are only paint splats and will clean-off with some elbow grease. The grilles themselves are fine.

These sound wonderful when situated side-by-side in free air. Positioned in the corners where they’re supposed to be and acoustic quality reaches a whole new level.

Please note: the bass drivers are both the correct Allison units. The original owner sent off to the USA for a replacement when one was damaged and Allison provided a replacement with a plain cone, rather than the ribbed version. The magnets, chassis and specifications for both are the same. We checked when they were re-foamed.

The last picture is a screen-grab from the original Allison 1982 catalogue. The whole catalogue is available to view and/or print-out from the excellent hifiengine.com website.

The following information and specifications are from the Sterteomono website:

• One 10" (254 mm) woofers;
• One 3½" (89 mm) Convex Diaphragm mid-range units;
• One 1" (25 mm) Convex Diaphragm tweeters
• Crossover frequencies:  350 and 3,750 Hz

Crossover network:

LC half-section at both crossover frequencies. Air-core chokes and non-polar computer-grade capacitors are used. Three-position control switch (accessible from front) supplied for selection of system acoustic power response, from nominally flat to concert-hall balance slope

• Impedance:  4 Ω nominal (3,5 Ω minimum at any setting of balance switch)
• Efficiency:  better than 0,7% when placed at floor-wall intersection.
• Minimum amplifier power:  30 watts per channel to produce 100 dB sound pressure level in most domestic room environments.
• Acoustic power output capability:  0,5 acoustic watt minimum , over full frequency range, with 70 watt peak input.
• System resonance frequency:  45 Hz, nominal
• Effective system Q:  1.0. Low-frequency response -3 dB at 35,5 Hz, -6 dB at 29,5 Hz
• Enclosure:  Stabilized Radiation Loading sealed acoustic suspension design.
• Outside dimensions:  40" high by 15¼" wide by 10" front to back (1002 cm by 387 mm by 254 mm).
• Occupies 10⅞"(209 mm) of wall space minimum.
• Internal volume:  1,275 cubic inches (41,8 liters).
• Material:  High density particle board veneered with walnut, oiled finish
• Weight:  45 lbs (20,4 kg)

SOLD

These are big and very heavy, so shipping will not be an option. These are offered here strictly for personal collection from CR3 5UF. Alternatively we can deliver in person within 50 miles of CR3 5UF for petrol money

Payment accepted via Credit/Debit card, Bank Transfer, Personal Cheque or cash on collection.

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FOR SALE

Please contact us either by telephone on 01883 340073
or by sending and email to enquiries@retrotechaudio.co.uk
if you are interested in purchasing this item.

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