A-340A
| Brand | Altec Lansing, Altec |
| Manufacturer | Altec Lansing Corporation |
| Function | Amplifier, Power |
| Produced | 1955 |
| Country | United States |
| Signal Path | Analog Hardware |
| Dimensions | 21 × 17.1 × 31.8 cm (W × H × D) |
| Weight | 35lbs (Shipped) |
| Power | 117VAC, 60Hz 160W |
| Frequency Response | 5Hz-100kHz ±1dB (1W), 30Hz-20kHz ±0.25dB (40W) |
| Power Output | 40W |
| Gain | 66.5dB |
| Input Sensitivity | 1.4V |
| Input Impedance | 200kΩ |
| THD | 0.5% |
| IMD (40Hz, 2kHz, 4:1) | 1% |
| SNR | 95dB |
| Load Impedance | 8/16Ω |
| Output Impedance (16Ω) | 0.52Ω |
| Damping Factor (8Ω) | -4.0 to +4.5 (Continuously Adjustable) |
| Output Tube | 6550 |
| Tube Complement | 12AY7, 12AU7, 6550 (x2), 5U4GB, OA3/VR75 |
| MSRP (1955) | $159 |
| Channels | 1 Channel |