AR(Acoustic Research) AR-3a

Commentary

This speaker system is an improved version of the AR-3 Scoker and Tweeter announced in 1959.

A 30 cm high compliance cone type woofer is used for the low range.

A 3.5 cm dome type unit is used for the middle range and a 2 cm dome type unit is used for the high range.
By using a newly developed material, the aperture is made smaller and the crossover is lowered, which improves the medium and high frequency reproduction characteristics and directional characteristics.

Level control is provided for the middle and high frequencies.

The enclosure uses an acoustic suspension system.
This method was invented by Mr. Edgar Wiltier and was developed to eliminate the disadvantages of conventional speakers, especially the high harmonic distortion at low frequencies. The acoustic suspension method uses strong cone paper and a completely sealed box with no air leakage and resonance to reduce parasitic vibration and distortion at low frequencies.

The exterior is finished with a walnut oil finish.

Model Rating

Method	3-way, 3-speaker, acoustic suspension system ・ Bookshelf type
Units Used	For low band : 30 cm cone type For Middle Area : 3.8 cm Dome Type For High Pass : 2 cm Dome Type
Frequency characteristic	30 Hz to 20 kHz
Impedance	4 Ω
Minimum amplifier output	25W (RMS, one channel) or more
Crossover frequency	575 Hz, 5 kHz
External dimensions	Width 356x Height 635x Depth 292 mm
Weight	24kg