Acoustic Research AR3a Stereo Speakers. They have some minor scratches/scuffs. One of the tweeters has a small dent. Check pictures to see physical condition. I replaced the foam surrounds on the woofers including centering the voice coils. The midrange and tweeter controls need cleaned/serviced. You have to turn the controls back and forth in order to get the mids and tweeters to play. You can get them to stay on in certain positions but for speakers this nice you will want to service them. I have tested all the drivers with an ohm meter, an audio generated frequency sweep and audibly with music. With the controls in position with the drivers working they sound incredible. Acoustic Research AR-3a Specifications. Drive Units: 305 mm (12 in) acoustic suspension woofer, 38 mm (1 1/2 in) midrange hemispherical dome, 199 mm (3/4 in) high-frequency hemispherical dome. Crossover: 575 Hz, 5000 Hz. Impedance: 4 ohms nominal. Controls: Midrange and high-frequency driver level controls. Amplifier: Up to 100 watts per channel. Size: 356 x 636 x 289 mm deep (14 x 25 x 11 3/8 in). Weight: 24 kg (53 lb). Woofer resonance: Free air 18 Hz, in enclosure 42 Hz. Volume of enclosure: 48.2 litres (1.7 cu ft). Thank You for Looking! I repair most make and model pro and home audio speakers. Services include: Speaker reconing, Voice Coil Replacement, Foam Surround Replacement etc. All of the materials I use are of the highest quality. The free listing tool. The item “Acoustic Research AR-3a Speakers / New Foam Surrounds” is in sale since Wednesday, August 1, 2018. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Speakers”. The seller is “geoaliwil” and is located in Old Hickory, Tennessee. This item can be shipped to United States.
- Model: AR3a
- Brand: Acoustic Research
- Type: 3-way Stereo Speakers