RDL HR-MP2A – Dual Microphone Preamplifier, 48 V Phantom
RDL HR-MP2A – Dual Microphone Preamplifier, 48 V Phantom is backordered and will ship as soon as it is back in stock.
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RDL HR-MP2A – Dual Microphone Preamplifier, 48 V Phantom
What is the RDL HR-MP2A?
The RDL HR-MP2A is a dual-channel microphone preamplifier that converts two XLR microphone signals to balanced line level. Each preamplifier has front-panel gain, a 15 dB input pad, polarity reversal and a CLIP indicator, with switchable 48 V phantom for both channels. It operates as a stereo preamp or as two independent mono preamps and adds a summed mono output. It suits conference rooms, houses of worship and training rooms that need clean microphone gain ahead of a mixer, DSP or recorder.
How does it work?
Gain on each channel is continuously adjustable from 20 dB to 60 dB using a front-panel control. The INPUT PAD switch attenuates the input by 15 dB, increasing the maximum input level from +5 dBu to above +20 dBu. A POLARITY switch reverses signal polarity when needed, and switchable 48 V phantom powers condenser microphones on both preamplifiers. The CLIP LED flashes when a peak comes within 3 dB of clipping, a threshold 17 dB above a normal +4 dBu output. Each preamplifier provides balanced outputs on a detachable terminal block and a 1/4 in TRS jack, and a summing amplifier provides a combined mono output. Balanced outputs may be wired unbalanced, and the rear panel provides a terminal block and power jack for 24 Vdc. THD and crosstalk are below the noise floor, with CMRR above 80 dB. The half-rack-width shielded metal enclosure can stand alone or mount in an RDL rack adapter. RDL recommends the PS-24AS power supply for the USA or the PS-24AX for international installations; the supply is not included.
What are the key features?
- Two independent preamps — Separate gain, pad and polarity controls for each microphone channel.
- 20 to 60 dB gain — Front-panel controls set continuous gain on each channel.
- 48 V phantom — Switchable 48 V phantom powers condenser microphones on both preamplifiers.
- 15 dB input pad — The pad raises the maximum input level above +20 dBu for hot sources.
- CLIP indicators — A CLIP LED per channel warns when peaks come within 3 dB of clipping.
- TRS and terminal block outputs — Each preamp outputs on 1/4 in TRS and terminal block, plus a mono sum.
Where is it typically used?
- Conference room
- House of worship
- Training room
- Boardroom
- Broadcast studio
Technical Specifications
| Model | HR-MP2A |
| 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 |
| Output Impedance | 150 Ω 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 Ω source); <-70 dB (20 Hz to 20 kHz, 60 dB gain, 150 Ω 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 | Height: 1.7 in, 4.3 cm; Length: 8.6 in, 20.6 cm; Depth: 4.59 in, 11.66 cm |
Frequently Asked Questions
How does the HR-MP2A differ from the HR-MP2?
The HR-MP2A has TRS and terminal block outputs, 48 V phantom for both preamps and CLIP LEDs. The HR-MP2 adds XLR outputs, a low-cut filter, 24 V or 48 V phantom per input and VU meters.
Can it run as a stereo preamplifier?
Yes. It can be used for stereo or as two separate mono preamplifiers.
What power does it need?
24 Vdc at 165 mA, or 190 mA with phantom, ground-referenced. RDL recommends the PS-24AS power supply for the USA or the PS-24AX for international installations; the supply is not included.
What is the frequency response?
10 Hz to 70 kHz within ±0.5 dB.
How is it mounted?
It operates free-standing with the included feet, or mounts in a rack using an optional RDL adapter such as the HR-RA2 or HR-HRA1.
What warranty does the HR-MP2A carry?
This product is covered by a 7-year RDL warranty. For warranty claims, RMAs or support, contact Creation Networks at (888) 230-3661 or sales@creationnetworks.net.
Can Creation Networks help integrate the HR-MP2A?
Yes. Creation Networks supports system design, equipment selection and installation planning for RDL products nationwide. Call (888) 230-3661 for a quote or technical help.
At Creation Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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