Audio Database


690,000 yen(around the 1985 time)

The large-sized speaker system packed into the walnut cabinet which improves based on "voice of the theater" A7-X, and matches a crossing-home terrier.

411-8A is carried in low-pass.
The long travel voice coil with an aperture of 10cm is driven by the magnetic circuit with a weight of 8.2kg.

Driver 902-8A and a sectoral horn 811B are carried in the inside region.
902-8A is a ferrite type of 902-8G, and has adopted the tangerine phase plug.
Moreover, reinforcement is doubly carried out with the flange and three sections with which 811B is characteristic. Furthermore, the resonance and resonance of the phon are suppressed by using special alloy die-casting.

MR-902 tweeter of an establishment meter is carried in the high region.
Manta Leh Horne was employed as the phon part, and the problem of the phon tweeter that directional characteristics become beam-like is canceled as frequency rises.
Thereby, directional characteristics realized the 10kHz cone type of 65 ", and have secured the large service area.

The frontloading type bass-reflex cabinet in which the top engineer of ALTEC performed adjustment by Hearing impression is adopted as the enclosure.
Detailed tuning is given to the bass-reflex port part, and the flow and resonance sound of air of a bass-reflex port part are controlled.

Rating of a mode
System 3 ways, a 3 speaker all phone + bass-reflex system, and a floor type
Use unit etc. For low-pass: Corn type (411-8A)
For inside regions: Phon type (902-8A+811B)
For high regions: Phon type (MR-902)
Impedance 8ohms
Play frequency band 20Hz - 20000Hz
Output sound pressure level 100dB (new JIS)
Allowable input 65W
Crossover frequency 1.2kHz, 8kHz
Dimensions Width 630x height 1130x depth of 470mm
Weight 63kg