Altec Lansing 9440A
A high-power stereo amplifier built for precision speaker control, featuring direct-coupled circuitry and dual input options.
Overview
The Altec Lansing 9440A is a stereo power amplifier developed by Altec to drive its own speaker systems under ideal conditions. Built around an OCL (Output Capacitor-Less) direct coupling configuration, it delivers clean, stable power with minimal signal degradation. Designed for professional and high-end audiophile use, the 9440A offers substantial output—200 watts per channel in stereo and up to 800 watts monaurally—making it a robust solution for demanding audio setups.
Specifications
| Effective power (Stereo) | 200W + 200W (8 Ω, 20 Hz to 20 kHz) |
| Effective power (Monaural) | 800W (8 Ω) |
| Harmonic distortion factor | 0.1% or Less (20 Hz to 15 kHz at Stereo Full Power) |
| Harmonic distortion factor | 0.25% or Less (at Monaural 400W output) |
| Frequency characteristic | 5 Hz ~ 100 kHz ± 3 dB (at 1W) |
| Frequency characteristic | 20 Hz ~ 20 kHz ± 0.25 dB (1W input, 8 Ω load) |
| Input Sensitivity / Impedance | 0.6V/13k Ω |
| Signal-to-noise ratio | 100dB(20kHz) |
| Channel separation | 80 dB (1 kHz, 8 Ω) |
| Gain | 58.7dB |
| Power requirements | 120 VAC, 50Hz/60Hz |
| External dimensions | Width 483x Height 178x Depth 279 mm |
| Weight | 25.6kg |
| Original price | ¥ 691,000 (1 unit, around 1977) |
Design
The amplifier uses an OCL direct coupling circuit design for improved low-frequency response and signal integrity. The front panel is constructed from die-cast material for durability and rigidity. Input connectivity includes both pin plugs and standard Canon (XLR) connectors, with the option to add a balanced input transformer as an accessory.
Context
Developed by Altec specifically to drive its own speaker systems under ideal conditions, the 9440A was engineered to deliver precise, high-current amplification tailored to the company's professional audio ecosystem.
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