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Radio Design Labs

Radio Design Labs HR-MP2A Dual Microphone Preamplifier

Name: Radio Design Labs HR-MP2A Dual Microphone Preamplifier
Brand: Radio Design Labs
SKU: HR-MP2A
Price: 595.20 GBP
Availability: OutOfStock

£595.20inc. VAT

£496.00 ex. VAT

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Bought in the UK, backed in the UKWhy it matters →

Sourced through UK distribution
UK manufacturer warranty
UK-based engineers
No import duty or customs charges
GBP pricing, UK VAT invoices

Return within 14 days

Installation services available Purchase orders: education customers only

7 Years Warranty Included

Key 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 kΩ balanced

Phantom powerSwitchable (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

All 21 specifications

Description

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.

Full specifications Datasheet Compare alternatives

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.

Key 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 ¼” TRS or Detachable Terminal Block

• Separate Summed Output 1 + 2 on Detachable Terminal Block

Manufacturer part number HR-MP2A.

Key features

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 kΩ 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

Technical specifications

Connectivity

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 kΩ balanced

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 Impedance150 Ω balanced

Residual Noise (below +4 dBu output)<-85 dB (20 Hz to 20 kHz, 40 dB gain, 150 Ω source); <-70 dB (20 Hz to 20 kHz, 60 dB gain, 150 Ω source)

Power & Physical

MountingRack-mount using optional rack adapters such as HR-RA2; or operate free-standing (feet included)

DimensionsHeight: 1.7 in, 4.3 cm; Length: 8.6 in, 20.6 cm; Depth: 4.59 in, 11.66 cm

Shipping Weight2.68 lbs.

General

Phantom powerSwitchable (both preamplifiers) 48 V phantom (IEC 61938: 2013)

Channels2 (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 Response10 Hz to 70 kHz (± 0.5 dB)

THDBelow noise floor

CMRR> 80 dB (50 Hz to 5 kHz)

CrosstalkBelow noise floor

Indicators (3)POWER LED (blue), CLIP (2, red)

Power Requirement24 Vdc @ 165 mA (190 mA with phantom), Ground-referenced

Documents

Radio Design Labs HR-MP2A Dual Microphone Preamplifier — RDL Datasheet

Delivery & returns

Estimated delivery 9 Sept - 13 Sept. UK mainland delivery only. Some large or made-to-order items carry longer lead times, shown on the product page.

Unused items in original packaging can be returned within 14 days of delivery — see the returns policy for how business and consumer returns differ. Faulty items are covered under manufacturer warranty and by your statutory rights.

Full delivery & returns policy

Bought in the UK, backed in the UK

This item is sourced through UK distribution and ships to you from within the UK, so the order never crosses a customs border.
The manufacturer warranty is honoured here in the UK. If something fails, you deal with us, not with an overseas seller in another time zone.
Our own UK-based engineers install, commission and support what we sell, and can attend site when a system needs hands on it.
Delivered within the UK mainland, so there is no import duty, customs charge or courier handling fee waiting for you on delivery.
Prices are in pounds sterling with proper UK VAT invoices, and purchase orders are accepted from approved education accounts: no currency conversion and no surprises at the door.

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Payment & security

Pay securely by card. Education customers can apply for a 30-day purchase order account.

Schools, colleges, sixth forms, universities and multi-academy trusts can order on invoice, with no card payment required. Purchase orders and credit terms are for education customers only.

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