AR(Acoustic Research) AR-90

AR(Acoustic Research) AR-90 198,000 yen(around the one-set and 1980 time) Description 　 The Tallboy type speaker system of the vartical series which inherited the main designs of AR-9 and realized the miniaturization further. Two 25cm corn type Woofers are carried in low-pass, and little distorted low-pitched sound play is realized by installing in enclosure both sides. The same 20cm corn type Woofer as AR-9 is carried in inside low-pass. The natural vocal play is realized by having prevented the mutual intervention by mounting to the subenclosure, and also making this unit take charge of 200Hz - 1200Hz which is a vocal zone. 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 same thing as AR-9 is adopted like [ these units ] inside low-pass, the magnetic fruid of the shape of colloid which is tinged with the magnetism of NASA development was put in between the voice coil and the yoke, and the input-proof is improved while aiming at distorted reduction from a central axis as a structure as for which Bure is not. A "17AWG sky core coil", a "computer class electrolytic condenser", "input-proof [ unguided quantity ] ceramic resistance", etc. are used for the network portion. 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: 25cm 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 23Hz - 30kHz Low-pass play frequency 32Hz -3dB System Q 0.8 Output sound pressure level 87dB/W/m Impedance 4ohms (a minimum of 3.2ohms) The continuation maximum input 150W The maximum input 300W Crossover frequency 200Hz, 1.2kHz, 7kHz Level control Inside low-pass: Three-step switching mid-high range: three-step switching High region: Three-step switching Content volume 90L Dimensions Width 368x height 1102x depth of 386mm Weight 37kg