AR(Acoustic Research) AR-9

AR(Acoustic Research) AR-9
	278,000 yen(around the one-set and 1980 time)

Description 　 The large-sized Tallboy speaker system of the vartical series which also fully consider up the correspondence to high-output power amplifier, and was designed. Two 30cm corn type Woofers are adopted as low-pass, and it has composition arranged on both the sides of the enclosure. Furthermore, the wall dip phenomenon generated between a speaker and a back wall is canceled because crossover frequency shall be 200Hz. inside low-pass -- a 20cm corn type and a crown -- the unit of a 1.9cm dome shape is carried in the 3.8cm dome shape and the high region in the region. The inside low-pass unit is carried in the subenclosure, and has prevented the mutual intervention in a core. moreover, a crown -- the "magnetic fruid" of the shape of colloid which is tinged with the magnetism which NASA developed is put in between the voice coil of a region / high region unit, and the yoke. And distorted reduction was aimed at from the central axis as a structure as for which Bure is not, and the input-proof is improved. The electronic automatic transmission developed uniquely is adopted as the network part as an object for low-pass. This controls the low-pass characteristic automatically electrically like the missions of an automatic car,Without reducing a low-pass output, it operates so that dumping may become the maximum with resonance frequency, and even if it exceeds a bus spectrum about the part beyond resonance frequency, it switches electrically so that the flat characteristic may be secured. Moreover, a 17AWG sky core coil, a computer class electrolytic condenser, input-proof [ high ] ceramic resistance, etc. are adopted as the use element. The acoustic suspension system of AR tradition is adopted as the enclosure. By this system, air can achieve the duty of a spring by carrying out full sealing of the core, compliance can be enlarged, and it is possible to make low-pass resonance frequency lower. Moreover, the acoustic blanket which is a special sound-absorbing material was attached to the surroundings of a driver unit, and sound quality degradation by reflective sound is prevented. Finishing is walnut oil finishing.

Rating of a mode System 4 ways, 5 speaker acoustic suspension system, and a Tallboy type Use unit For low-pass: 30cm corn type x2 For inside low-pass: 20cm corn type a crown -- : for regions -- a 3.8cm dome shape For high regions: 1.9cm dome shape Frequency response 18Hz - 30kHz Low-pass play frequency 28Hz -3dB System Q 0.5 Output sound pressure level 87dB/W/m Impedance 4ohms (a minimum of 3.2ohms) The continuation maximum input 175W The maximum input 400W Crossover frequency 200Hz, 1.2kHz, 7kHz Level control Low-pass: Automatic Inside low-pass: Three-step switching a crown -- region: -- three-step switching High region: Three-step switching Content volume 120L Dimensions Width 381x height 1340x depth of 402mm Weight 59kg