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RDL HR-MCP2


Dual Channel Mic Compressor

BSW PART: HRMCP2

RDL HR-MCP2
RDL HR-MCP2rear
The Radio Design Labs HR-MCP2 dual-channel microphone compressor offers full studio-quality low-noise performance at any gain setting while delivering a consistent audio output level over wide variations (up to 25 dB) in the microphone input level. Rear-panel switches let you set each output to mic or line level, so each channel can be used as a mic-level in-line compressor or as a microphone preamplifier with compression. The HR-MCP2 is compatible with dynamic and condenser microphones (a front-panel switch is provided to enable 48 Vdc phantom power to both microphone inputs).

*Does NOT ship with power supply

The HR-MCP2 is designed to hold average output levels constant without altering the sonic integrity of dynamic sources. Gain reduction is nearly instantaneous for both expected and severe input overloads. Automatic release time adjustments result in nearly inaudible compression action over the entire dynamic gain reduction range. The HR-MCP2 improves sound quality and intelligibility by producing consistent audio levels and controlling overloads that produce distortion and clipping. It is ideally installed as the microphone preamplifier, or in-line between a microphone and its associated mixer input, in on-air broadcast studios (announce mic, guest mics, crowd mics), voice-over studios, public address systems, meeting rooms, public venues and commercial sound systems.

Each channel is equipped with a front-panel FILTER switch to enable or disable a 6 dB/octave low-cut filter with a -3 dB cutoff at 80 Hz. Each input includes a front-panel INPUT PAD switch that lets you attenuate the input signal by 15 dB prior to the input stage, increasing the maximum input level from +5 dBu (attenuator out) to greater than +20 dBu. The GAIN control provides continuous adjustment between 20 dB and 60 dB (for the line-level output) to set the correct gain for normal microphone levels. A CLIP LED flashes if a signal peak is within 1 dB of clipping. A seven LED metering string displays the instantaneous gain reduction in 3 dB increments.

The HR-MCP2 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-MCP2 to be operated as a stereo mic compressor or preamplifier, or as two separate mono compressor/preamplifiers.

Each channel provides two balanced input and output formats on the rear panel (detachable terminal block and XLR). Balanced inputs and 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-MCP2 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).

Radio Design Labs HR-MCP2 Features:
• Two independent microphone input compression channels
• Produces consistent levels from any microphone
• Installs between microphone and mixer or amplifier mic input
• Line-level outputs permit operation as dual mic preamp
• Controls overloads that cause distortion and clipping
• Balanced mic inputs on XLR and detachable terminal block
• Balanced outputs on XLR and detachable terminal block
• Each output allows balanced or unbalanced connection
• Independent controls for stereo or dual mono operation
• Front-panel gain adjustment from 20 to 60 db for line outputs
• Switch-selectable 15 db input pads
• Switch-selectable 48-volt phantom power for both inputs
• 7 LED gain reduction meter in 3 db increments per channel
• Clip indicators for peaks 1 db below clipping

Radio Design Labs HR-MCP2 Specifications:
• Inputs (4): XLR (2, 3 pin, rear panel, 1=GND, 2+, 3-); detachable terminal block (2)
• Input level (for uncompressed output): -60 dBu to -20 dBu (without input pad); -45 dBu to -5 dBu (with input pad)
• Maximum Input Level: > +5 dBu (input pad disabled), +22 dBu (input pad enabled)
• Input Impedance: > 1.5 kohms balanced
• Phantom power: Selectable 48 V phantom (IEC 1938: 1996-12)
• Input pad (2): 15 dB nominal (1 per input channel)
• Outputs (4): XLR (2, 3 pin, rear panel, 1=GND, 2+, 3-); detachable terminal block (2)
• Output level: Mic: -45 dBu (nominal, into 600 Ohms); Line: +4 dBu balanced (nominal, dynamic audio source), +1 dBu balanced (nominal, sine-wave producing 3 dB compression)
• Output Impedance: 150 ohms balanced
• Channels: 2 (1 and 2; may be used for stereo or as two separate mono channels)
• Gain Trim (2): 20 dB to 60 dB (line-level output; front panel adjustable; one for each channel)
• Frequency Response: 10 Hz to 25 kHz (+/- 0.5 dB, FLAT); -3 dB @ 80 Hz (LOW-CUT FILTER enabled)
• THD: Below noise floor (3 dB compression)
• CMRR: > 70 dB (50 Hz to 5 kHz)
• Residual Noise (below rated output level): < -85 dB (20 Hz to 20 kHz, 40 dB gain, without compression, 150ohm source); < -70 dB (20 Hz to 20 kHz, 60 dB gain, without compression, 150ohm source)
• Crosstalk: Below noise floor
• Indicators (17): POWER LED (blue), GAIN REDUCTION (7 per channel, yellow, 3, 6, 9, 12, 15, 18, 21 dB), CLIP (2, red)
• Power Requirement: 24 Vdc @ 200 mA (230 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

RDL HR-MCP2 Figure 1

List Price: $735.77
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