In full working order and professionally Re-foamed. In very good condition for their age but some scratches and the top corners are a bit chipped. The mid range, high range and the bass are wonderful, bass is deep, tight and controlled, although very powerfull. Best speakers ever. 

 

Back in 1982 Edgar Villchur, the founder of the original Acoustic Research Company already knew stuff about acoustic engineering loudspeakers design many modern day designers have only come to know in recent years. One such aspect is the minimalist cross over network, that wen implemented in conjunction with custom designed drive units, cause for unparalleled transparency from the transducer system. AR's most famous loudspeakers, the AR 28S and back in the 1982 already featured modern day buzz like in house custom designed and manufactured drive units, minimalist cross-overs and ferro-fluid cooling.

System Type: Bookshelf or floor standing acoustic suspension 2 way- system with drive units in vertical array.

Drive Units: 200 mm-8'' acoustic suspension woofer. 25 mm-1'' liquid cooled dome highrange driver.

Voltage Sensitivity: 2.83 volts produces 88 dB SPL at 1 meter on axis.

Efficiency: 1 watt produces 87 dB SPL at 1 meter on axis.

Power Handling Ability: May be used with amplifiers capable of delivering up to 100 watts continuous power per channel, being driven into clipping no more than 10% of the time on normal speech and music source material in non-commercial applications.

System Frequency Response: Half power points at 50 Hz and at 24000 Hz

System Low Frequency Performance: -3dB at 50 Hz with an effective Q at resonance of 0.85.

Impedance: 6 Ohms nominal 

Crossover Network: Woofer has a 12 dB/ octave mechanical crossover

Highrange has a second order electrical network for 12 dB/ octave slope.

Crossover Frequency: 2000 Hz

Cabinet Internal Volume: 18.1 liters

Cabinet Dimensions: 544 x 298 x 199 mm deep

Cabinet Finish: Walnut grain vinyl veneer.

Weight: 10.9 Kg per speaker