 | Benchmark MPA1 Preamp |
| Benchmark MPA1 Preamp |
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Benchmark MPA1 PreampA perfect choice for stereo pairs, ribbon mics, and any other application where purity is the goal. The MPA1 is a 2-channel microphone preamplifier designed and manufactured by Benchmark Media Systems, Inc. The MPA1 is meticulously designed to Benchmark standards of transparency, ultra-low distortion, and ultra-low noise performance — making the MPA1 a perfect choice for stereo pairs, ribbon mics, and any other application where purity is the goal. Pristine Input StageThe input stage of the MPA1 is designed with high-voltage headroom (+29 dBu) and single-stage gain control to maximize signal-to-noise ratio. The MPA1 maintains superb noise performance across the entire gain range (74 dB) by utilizing precision-matched, low-noise, transistor quad-arrays. A servo-controlled circuit minimizes DC-offset and maximizes headroom. Complete Low Frequency Response The MPA1 exhibits exceptional low-frequency performance with a clever dual-capacitor AC-coupling design. This dual-capacitor design defeats the limitations of single-capacitor AC-coupling designs, achieving an exceptionally low corner-frequency with excellent subsonic phase-accuracy. Innovative Stepped-Resistor Gain Control The gain control of the MPA1 is completely unique. The gain is controlled via a 38-position, switched resistor ladder, set up in a continuously rotating orientation via relay control. This gain control circuit offers 2 dB per step, 0-74 dB of gain without attenuation, and inter-channel gain precision of +/- 0.03 dB. A make-beforebreak scheme creates a silent switching circuit. Elegant Phantom Power Protection The transistor stage is protected from phantom power surges with an ultra-fast, multi-stage protection circuit. This circuit utilizes the high-speed capabilities of low-capacitance Schotky diodes and the high-current capabilities of TVS diodes to absorb the phantom power surges caused by shorts and plugging/unplugging microphones with +48V on. This circuit is pre-biased so that it is isolated from the circuit in normal operation and activated when a surge occurs. Close...
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| Benchmark MPA1 Preamp |
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$1895.00 | ||
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