Benchmark PRE420 - Microphone Preamp - 110V

Benchmark PRE420 - Microphone Preamp - 110V

Benchmark PRE420 - Microphone Preamp - 110V

B&H # BEPRE420 MFR # 500-07150-000
Benchmark PRE420 - Microphone Preamp - 110V

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Product Highlights

  • 4 Channels
  • Stereo Mix Bus
  • Excellent RF Immunity
  • Phantom Power
  • 1U Rack
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Benchmark 500-07150-000 overview

  • 1Description

The PRE420 from Benchmark is a four-channel microphone preamp, designed to provide a transparent and wide-bandwidth signal path, along with low-noise, low-distortion, and superior RF immunity. The unit is equally suited for professional studio applications, as well as for recording and performance in live venues.

Each of the four inputs include +48V phantom power, a 20dB pad, and a 40Hz high-pass filter. Additionally, the unit features a very low-noise stereo mix bus with proprietary circuitry that achieves precise, distortion-free, constant-power panning. Utilizing the mix bus, the user can capture pristine direct-to-stereo recording from up to four microphones.

To assist in this process, a solo bus allows for monitoring of any individual microphone as well as any stereo or mono mix of microphones. The solo bus is routed to the balanced control room outputs and to the headphone amplifier. A switch is provided that enables the control room outputs to be muted on headphone insertion.

Gain is controlled by matched 41-detent pots, allowing the user to accurately recall particular gain settings. The preamp has an internal power supply and is housed in a single space, rack-mount chassis.

Four-channel microphone preamp that delivers up to 500kHz of bandwidth, ultra-low noise and distortion, along with superb RF immunity
Balanced, transformerless inputs and outputs
Stereo mix bus and isolated stereo/mono solo bus
The stereo mix bus includes MirrorPan - Benchmark's proprietary zero-distortion, constant-power panning technology
Precision-matched monolithic low-noise transistor quads on each microphone input
60db maximum first-stage gain, adjustable to 70db
CMF1 common mode RF filter on each microphone input
Four direct XLR outputs, two control room XLR outputs, and two mix XLR outputs
Matched forty-one detent first-stage gain controls on every microphone input
Forty-one detent main output level control
High-current, HPA2 "0-Ω" headphone amplifier with a switch that enables muting the control room output on headphone insertion
Forty-one detent control room/headphone level control
Adjustable peak warning indicator and variable intensity signal level meter on each channel and the mix bus
High-current, high-speed, low-capacitance phantom protection circuits, fully protected against phantom hot-plug and cable-shorting scenarios
Independently switchable +48V phantom power, 40Hz switchable high-pass filter, and -20dB pad per channel
Ultra-quiet linear power supply with rear-panel input voltage selector
In the Box
Benchmark PRE420 - Microphone Preamp - 110V
  • AC Power Cable
  • Five (5) Year Warranty on Registration, to Original Purchaser
  • Table of Contents
    • 1Description

    Benchmark 500-07150-000 specs

    Number of Channels 4
    Inputs 4 x XLR
    Output 4 x XLR Direct Out
    2 x XLR Mix Out
    2 x XLR Control Room Out
    Phantom Power Yes (independently switchable)
    Multi Function No
    Gain Range 22dB to 60dB (to direct outputs)
    Maximum Output Level +29.5dBu
    Frequency Response 10Hz to 200kHz, -0.02/-0.17dB
    Noise EIN: -128dBu at 150&927;
    Dimensions (WxDxH) 19 x 11.75 x 1.725" (483 x 299 x 44 mm)
    Weight 8.05 lbs (3.65 kg)
    Specialties 40Hz, second-order 12-dB/octave high pass filters
    Packaging Info
    Package Weight 10.82 lb
    Box Dimensions (LxWxH) 22.8 x 16.5 x 5.6"

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