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Radio Design Labs HR-MP2A
Dual Microphone Preamplifier

OUR PART #:  HR-MP2A

The HR-MP2A is a dual channel microphone preamplifier with line-level outputs. Each section provides identical rear-panel signal connections and front-panel controls.
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List Price: $452.03
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Radio Design Labs HR-MP2A
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The HR-MP2A is a dual channel microphone preamplifier with line-level outputs. Each section provides identical rear-panel signal connections and front-panel controls.

Each preamplifier is equipped with a front-panel INPUT PAD switch that allows the operator to attenuate the input signal by 15 dB prior to the preamplifier input stage, increasing the maximum input level from +5 dBu (attenuator out) to greater than +20 dBu. A POLARITY switch provides signal polarity reversal if needed. The GAIN control provides continuous adjustment between 20 dB and 60 dB. A CLIP LED flashes if a signal peak is within 3 dB of clipping. The trigger threshold of the CLIP LED is 17 dB above a normal +4 dBu output.

The HR-MP2A offers 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, allowing the HR-MP2A to be operated as a stereo preamplifier or as two separate mono preamplifiers.

Each preamplifier provides two balanced line-level output formats: Detachable terminal block and ¼” TRS. A separate summing amplifier provides a combined mono output on a line-level detachable terminal block. Balanced outputs may be wired unbalanced. The rear panel also provides a detachable terminal block and a power input jack to connect 24 Vdc power.

The HR-MP2A is constructed in a durable half-rack-width shielded metal enclosure for free-standing use or for mounting in an RDL rack adapter, available separately.

Features:

  • Two Independent Microphone Preamplifiers
  • Balanced XLR Microphone Inputs
  • Independent Controls for Each Preamplifier
  • Front-Panel 20 to 60 dB Gain Control
  • Switch-selectable 48 Volt Phantom
  • Switch-Selectable 15 dB Input Pad
  • Switch-Selectable Polarity Reversal
  • Switch-selectable 48 Volt Phantom for Both Preamplifiers
  • CLIP Indicators for Peaks 3 dB Below Clipping
  • Balanced Line-Level Outputs
  • Each Output Allows Balanced or Unbalanced Connection
  • Each Preamp Output on 1/4" TRS or Detachable Terminal Block
  • Separate Summed Output 1 + 2 on Detachable Terminal Block

Specifications:

  • Inputs (2): XLR (3 pin, rear panel,1=GND, 2+, 3-)
  • Input level (for +4 dBu output): -56 dBu to 0 dBu (maximum gain without pad, minimum gain with pad)
  • Maximum Input Level: >+5 dBu (input pad disabled), +22 dBu (input pad enabled)
  • Input Impedance: < 1 kOhms balanced
  • Phantom power: Switchable (both preamplifiers) 48 V phantom (IEC 61938: 2013)
  • Input pad (2): 15 dB nominal (1 per preamplifier)
  • Outputs (5): Each preamplifier (rear-panel): Detachable terminal block, ¼” TRS
  • Mono sum (rear-panel): detachable terminal block
  • Output level: +4 dBu balanced, -4 dBV unbalanced; +24 dBu maximum balanced
  • Output Impedance: 150 Ohms balanced
  • Channels: 2 (1 and 2; may be used for stereo or as two separate mono preamplifiers)
  • Gain Trim (2): 20 dB to 60 dB (front panel adjustable; one for each preamplifier)
  • Frequency Response: 10 Hz to 70 kHz (± 0.5 dB)
  • THD: Below noise floor
  • CMRR: > 80 dB (50 Hz to 5 kHz)
  • Residual Noise (below +4 dBu output): <-85 dB (20 Hz to 20 kHz, 40 dB gain, 150 Ohms source); <-70 dB (20 Hz to 20 kHz, 60 dB gain, 150 Ohms source)
  • Crosstalk: Below noise floor
  • Indicators (3): POWER LED (blue), CLIP (2, red)
  • Power Requirement: 24 Vdc @ 165 mA (190 mA with phantom), Ground-referenced
  • Mounting: Rack-mount using optional rack adapters such as HR-RA2; or operate free-standing (feet included)
  • Dimensions: 1.7"(H) x 8.6"(L) x 4.59"(D)
  • WEEE weight: 2.32 lbs.
Rack adapter, Half Rack
Radio Design Labs HRRA2 Rack adapter, Half Rack
The HR-RA2 is a 1RU rack chassis for mounting two RDL HALF-RACK products, plates or accessories. HALF-RACK series products drop into the chassis, slide into position and are secured by tightening two or four screws provided with the ...
49.24 65.87 25

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10.4" Rack Adapter for Half-Rack Series
Radio Design Labs HR-HRA1 10.4" Rack Adapter for Half-Rack Series
The HR-HRA1 is a 1RU rack chassis for mounting one RDL HALF-RACK product, plate or accessory. HALF-RACK series products drop into the chassis, slide into position and are secured by tightening two or four screws provided with the HALF-RACK ...
50.60 59.71 15

Usually ships in 7-14 business days.
Need it sooner? Call us!

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