The S&L Catalog
Dual Microphone Preamplifier
Series:
Model: HR-MP2A
- 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
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.
- 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
- Preamplifier Signal Type - Audio
- Spec Sheet available - Yes
- 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 1938: 1996-12)
- 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
- 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)
- Depth: 4.59 in
- Height: 1.70 in
- Width: 8.60 in
- Output Impedance: 150 ohm
- Shipping Weight: 2.70 lbs
Suggested Products
S&L Integrated
7 Midway Road
Thomasville, GA 31757
USA
(229) 378-8866
https://slintegrated.com/