RDL HR-MP2 - Microphone Preamplifier

RDL HR-MP2 - Microphone Preamplifier

RDL HR-MP2 - Microphone Preamplifier


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Expected availability: 7-10 business days

Product Highlights

  • Dual Channel
  • 40dB Gain
  • 6dB/Octave Low-Cut Filter
  • Polarity Switches
  • XLR, 1/4" TRS, Terminal Block Outputs
  • Separate Mono Summed Output
  • 24V or 48V Phantom Power
  • Dual-LED VU Meters
  • Half-Rack Enclosure
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RDL HR-MP2 overview

  • 1Description

The HR-MP2 from RDL is a dual channel microphone preamplifier housed in a half space rack-mount chassis. The preamp features exceptional input headroom, wide flat frequency response, and extremely low noise with very high common-mode signal rejection. Total harmonic distortion and crosstalk are below the noise floor.

Each section provides identical connections and controls. A low-cut filter, a 15dB pad, and polarity inverse can all be enabled, while phantom power can be switched between Off, 24VDC or 48VDC. Dual-LED VU meters are provided adjacent to each gain control. A separate clip LED flashes when a signal peak is within 3dB of clipping.

The HR-MP2 can be operated as a stereo preamplifier, or as two separate mono preamplifiers. Balanced line-level outputs include XLR, detachable terminal block, and 1/4" TRS phone connectors, which can be wired unbalanced. A separate summing amplifier provides a combined mono output on a line-level detachable terminal block, and a power input jack allows for connecting 24VDC power.

Two independent microphone preamplifiers
Balanced XLR microphone inputs
Independent controls for each preamplifier
Switch-selectable low-cut filter
Front panel 20dB to 60dB gain control
Switch selectable 24 or 48V phantom power
Switch selectable 15dB input pad
Switch selectable polarity reversal
Dual-LED VU meter for each preamplifier
CLIP indicators for peaks 3dB below clipping
Balanced line-level outputs
Each output allows balanced or unbalanced connection
Each preamp output on XLR, 1/4" TRS or detachable terminal block
Separate summed output 1 + 2 on detachable terminal block
UPC: 813721013378
In the Box
RDL HR-MP2 - Microphone Preamplifier
  • 4 x Rubber Feet
  • Three (3) Year Warranty
  • Table of Contents
    • 1Description

    RDL HR-MP2 specs

    Number of Channels 2 (1 and 2 may be used for stereo, or as two separate mono preamplifiers)
    Inputs 2 x XLR
    Input Impedance < 1kΩ balanced
    Input Level For +4dBu output: -56dBu to 0dBu (maximum gain without pad, minimum gain with pad)
    Maximum Level: >+5dBu input pad disabled, +22dBu input pad enabled)
    Gain Range 20dB to 60dB (front panel adjustable for each preamplifier)
    Pad Input: 15dB nominal (1 per preamplifier)
    Output 2 x XLR
    3 x Detachable terminal block
    2 x 1/4" TRS phone
    Output Impedance 150Ω balanced
    Output Level +4dBu balanced, -4dBV unbalanced
    +24dBu maximum, balanced
    Phantom Power Switchable 24V or 48V phantom
    Multi Function No
    Frequency Response 10Hz to70 kHz, +/-0.5dB, (flat); -3dB @ 80Hz (low-cut filter enabled)
    THD Below noise floor
    CMRR >80dB (50Hz to 5kHz)
    Noise Residual Noise (below +4dBu output): <-85dB (20Hz to 20kHz, 40dB gain, 150Ω source); <-70dB (20Hz to 20kHz, 60dB gain, 150Ω source)
    Crosstalk Below noise floor
    Indicators 1 x Blue POWER LED
    2 x Green/Red Dual-LED VU meter
    2 x Red CLIP
    Power Requirement 24VDC @ 175mA (200mA with phantom), ground-referenced
    Dimensions (WxDxH) 8.6 x 4.59 x 1.7" (206 x 117 x 43mm)
    Weight Not specified by manufacturer
    Specialties Rack-mount using (optional) rack adapters such as HR-RA2, or operate free standing (feet included)
    Packaging Info
    Package Weight 2.75 lb
    Box Dimensions (LxWxH) 10.2 x 7.4 x 2.4"

    RDL HR-MP2 reviews

    HR-MP2 - Microphone Preamplifier is rated 4.0 out of 5 by 1.
    Rated 4 out of 5 by from Excellent Mic Pre-amp for the Money Low noise and low distortion. I measured the input impedance at 5k Ohms balanced at 1k Hz (spec should read >1000 Ohms not <1000 Ohms). Output can be connected for balanced or unbalanced operation. Only reason I did not give this preamp 5 stars is that the gain adjustment is compressed at the high end - 50% clockwise pot rotation is 30db gain, while 90% clockwise pot rotation results in only 40db gain. Max gain is 60db at balanced line output, however, as per spec. Thus, at top end of gain pot, 10% rotation results in a 20db gain change - makes it hard to adjust! Still, a great preamp for the money and made in the USA.
    Date published: 2014-11-04
    • y_2018, m_11, d_15, h_16
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    • cp_1, bvpage1
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    • clientName_bhphotovideo
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