Vintage Acoustic Research AR-2ax Speakers AR-3 Era Beautiful. Low serial no’s! AX-17521 & AX-17524 These speakers are in very good condition & sound great. They will be packed safe for travel Acoustic Research AR-2ax and AR-2x Speaker Review, Specs The Acoustic Research 2x and 2ax (AR-2x / AR-2ax) are based on the design of the AR-3a, but were marketed as a value product, which means price played a crucial role. Therefore it contains most of the typical elements and ingredients as the high-priced Acoustic Research speakers, but has a slightly lower performance. AR-2x / AR-2ax Differences: The AR-2ax is a 3-way acoustic suspension speaker, meaning that its cabinets are completely sealed. The AR-2x is a 2-way acoustic suspension speaker which does not have the 1 3/8 in dome-type super-tweeter of the AR-2ax. The AR-2ax is a lower-cost version of our basic acoustic suspension design. It contains the 254mm woofer and 19 mm hemispherical dome, for very high frequencies, used in the AR-5. The midrange is covered by an 89 mm wide-dispersion cone unit. Separate controls on the back of the AR-2ax permit independent adjustment of the level of the midrange and high-frequency speakers. If you are that lucky, you should definitely get them. Refoaming the AR-2x and AR-2ax The AR-2 are fabulous speakers and restoring a broken or worn down pair can really pay off. Many of the ARs have foam surrounds that rotted away over the years. Replacing the old foams will take around 1 to 2 hours and is not difficult at all! It does not require any particular skill, just a calm hand and a little patience. We tried out several different available foams and recommend to use Parts Express 10 inch Surround Kit. Both, AR-2x and AR-2ax share the following specifications (except the 1 3/8 tweeter): Drive units: 10 in acoustic suspension woofer, 3 in midrange cone, 1 3/8 in mm high frequency hemispherical dome Crossover: 1400 Hz, 5000 Hz Impedance: 8 Ohms nominal Controls: Midrange and high-frequency driver level controls Amplifier: Up to 100 watts per channel Size: 13.5 x 24 x 11.5 in Weight: 36.5 lbs Woofer resonance: Free air 26 Hz, in enclosure 56 Hz Volume of enclosure: 38.2 litres 1.35 cu ft.