458A
| Brand | Altec, Altec Lansing |
| Manufacturer | Altec Lansing Corporation, Ling-Temco Electronics, Inc. |
| Function | Amplifier, Pre |
| Produced | 1960 |
| Country | United States |
| Form Factor | Part |
| Signal Path | Analog Hardware |
| Dimensions | 4.4 × 9.9 × 24.6 cm (W × H × D) |
| Weight | 3.5lbs |
| Power | 6.3VDC 0.7A, 275VDC 15mA |
| Frequency Response | 20Hz-20kHz ±1dB |
| Gain (Unterminated) | 40dB |
| Gain (Terminated) | 34dB |
| Power Output | +20dBm |
| THD (+20dBm, 50Hz-15kHz | 0.5% |
| THD (+25dBm, 1kHz | 1% |
| Source Impedance | 150/600Ω |
| Load Impedance | 150-600Ω |
| Equivalent Input Noise | -126dBm |
| Tube Complement | 6072/12AY7 (x2) |
| MSRP (1960) | $143 |
| Links | Altec 250 SU |
| Notes | 250 SU Console plug-in module. Available separately for custom installations. |