Audio Database


Based on the "Voice of the Theater" A7-X, this is a large speaker system that has been improved and put together in a walnut cabinet that matches home interior.

The low-frequency range is 411 to 8 a.
A 10 cm diameter long travel voice coil is driven by a 8.2 kg weight magnetic circuit.

The mid-range is equipped with a driver 902 to 8 a and a separable horn 811B.
The 902-8A is a 902-8G ferrite type and uses a Tangerine phase plug.
In addition, the 811B is double-reinforced with a characteristic flange and three sections, and special alloy die-cast is used to suppress horn squeal and resonance.

A newly designed MR 902 tweeter is installed in the high frequency range.
A manta ray Lehorn has been adopted for the horn section to solve the problem of the horn tweeter that the directional characteristics become beam-like as frequencies increase.
As a result, a conical directional characteristic of 10kHz65 ° is realized and a wide service area is secured.

The enclosure uses a front loading type bass reflex cabinet, which is adjusted by Paul Supran Carr, the top engineer of ALTEC himself.
The bass reflex port is carefully tuned to control the air flow and resonance sound of the bass reflex port.

Model Rating
Method 3-way, 3-speaker, all-horn + bass reflex system, floor type
Units used, etc. For Low Range : Cone Type (411-8A)
For Middle Range : Horn Type (902-8A + 811B)
For High Range : Horn Type (MR-902)
Impedance 8 Ω
Playback frequency band 20 Hz to 20000 Hz
Output sound pressure level 100 dB (New JIS)
Allowable input 65W
Crossover frequency 1.2 kHz, 8 kHz
External dimensions Width 630x Height 1130x Depth 470 mm
Weight 63kg