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MPA1 2-Channel Mic-Pre
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A perfect choice for stereo pairs, ribbon mics, and any other application where purity is the goal.
Pristine Input Stage
The Benchmark MPA1 mic pre's input stage offers high-voltage headroom (+29 dBu) and single-stage gain control to maximize the 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 Benchmark 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-before-break scheme creates a silent switching circuit.
Elegant Phantom Power Protection
The transistor stage is protected from phantom power surges with an ultra-fast, multistage 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.
For mounting options, see RM Kit #485682, RM Coupler #485683, and RM Blank #485683.
Features
- 38-position discrete linear gain switching (2 dB/ step)
- Automatic gain-range switching with LED range-indicators
- 0 74 dB total gain range
- Switchable 40-Hz high-pass filter (relay controlled “ no audio through switches)
- Switchable polarity invert (relay controlled “ no audio through switches)
- Independently switchable +48V phantom power
- HPA2 “ Benchmark's signature high-current, 0 Ohm headphone amplifier
- 4-segment, precision LED meters (calibration-free)
- Recessed phantom switch to prevent accidental switching
- Phantom-power disable jumper for dedicated ribbon mic operation
- Phantom-protection circuitry prevents damage from phantom power surges
- Internal, toridal linear power supply
- High-quality gold Neutrik connectors
- Maximum input +29dBu
- Maximum output: +29dBu
- Ultra-low noise/distortion (THD+N @ 22dB Gain 10Hz to 20kHz=0.00045%)
- RF-immunity over a wide bandwidth (500kHz)
- Designed, built, and tested in Syracuse, New York, USA
Get studio quality results! Order today
- Free Standard Ground shipping (48 contiguous states, some overweight and Used/Vintage items excluded).
- Orders placed before 3 p.m. ET usually ship the same business day.
Every guitar or bass you purchase from Musician's Friend (electric or acoustic, New or Open Box) includes two years of protection from manufacturer defects.
Our Gear Advisers are available to guide you through your entire shopping experience. Call or Chat for expert advice and to hear the latest deals.