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 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.Main Features:Two Independent Microphone PreamplifiersBalanced XLR Microphone InputsIndependent Controls for Each PreamplifierFront-Panel 20 to 60 dB Gain ControlSwitch-selectable 48 Volt PhantomSwitch-Selectable 15 dB Input PadSwitch-Selectable Polarity ReversalSwitch-selectable 48 Volt Phantom for Both PreamplifiersCLIP Indicators for Peaks 3 dB Below ClippingBalanced Line-Level OutputsEach Output Allows Balanced or Unbalanced ConnectionEach Preamp Output on TRS or Detachable Terminal BlockSeparate Summed Output 1 + 2 on Detachable Terminal BlockSpecifications: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 k balancedPhantom 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, TRSMono sum (rear-panel): detachable terminal blockOutput level:+4 dBu balanced, -4 dBV unbalanced; +24 dBu maximum balancedOutput Impedance:150 balancedChannels: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 floorCMRR:> 80 dB (50 Hz to 5 kHz)Residual Noise (below +4 dBu output):<-85 dB (20 Hz to 20 kHz, 40 dB gain, 150 source); <-70 dB (20 Hz to 20 kHz, 60 dB gain, 150 source)Crosstalk:Below noise floorIndicators (3):POWER LED (blue), CLIP (2, red)Power Requirement:24 Vdc @ 165 mA (190 mA with phantom), Ground-referencedMounting: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 cmPackage Type:Cardboard BoxPackage Dimensions:9.5 x 7 x 2.25 in.Shipping Weight:2.68 lbs.WEEE weight:2.32 lbsTariff code:8543.70.9860