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原帖 由 fox541 于 13-6-15 01:20 发表
话筒放大器是不是弱了一点？
。。。如果这样也说弱的话，我只能无语了！！！
| MICROPHONE PREAMPLIFIERS | |
| Configuration | Electronically balanced, with fully balanced analogue signal path |
| Gain | 10dB to 65dB in 1dB steps (0dBFS = -56dBu to -1dBu) plus switchable -20dB pad |
| Gain accuracy | ±0.05dB |
| Input impedance | 5.5kΩ |
| THD | +10dB gain: -116dB at -0.1dBFS (0.00016%) +40dB gain: -110dB at -0.1dBFS (0.00032%) |
| THD+N | +10dB gain: -108dB at -0.1dBFS (0.00040%) |
| Equivalent input noise (EIN) | +30dB gain: -128.5dBu (0Ω source); -126.3dBu (150Ω source) +40dB gain: -130.9dBu (0Ω source); -127.6dBu (150Ω source) +50dB gain: -131.2dBu (0Ω source); -127.7dBu (150Ω source) +60dB gain: -131.4dBu (0Ω source); -127.8dBu (150Ω source) |
| LF roll-off | -0.05dB at 20Hz, -3dB at 5Hz |
| HF roll-off | As per analogue line input data |
| CMRR | 50Hz/60Hz: >110dB at all gains 1kHz: >100dB at all gains 20kHz: >90dB at all gains |
| Phantom power | +48V, switchable per channel |
| Pad | -20dB, switchable per channel |