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Q-Pre 4-Channel Microphone Preamp

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Overview

4 independent E-Series mic preamps in half-rack package with balanced and unbalanced I/O.

The 4-Channel SM Pro Audio Q-Pre Microphone Preamp is for budget-conscious studios, yet it also works well in live environments as well. With systems available at very low prices, the market size for digital audio interfaces and computer-based digital editing has increased in a massive way. One of the main problems with many of these systems is the input stage only consists of unbalanced line inputs or very low (or no mic pre) gain structure for the balanced input stage and the unavailability of phantom power.

The SM Pro Audio Q-Pre comes to the rescue with 4 mic preamps, balanced input, gain control from -20dB to +40dB, and phantom power switchable for channels 1/2 & 3/4 (in pairs). The Q-Pre preamp uses SM Pro Audio's well-established E-Series mic preamps, enhanced circuit design, and robust housing, which can be rack mounted on an optional rack tray.



Features

  • Four totally independent preamplifiers in a half-rack package
  • High-quality audio
  • 4 x balanced inputs
  • 4 x unbalanced outputs
  • Phantom on/off per 2-channel pairs
  • 4 x peak indicators
  • Individual gain control on each channel
Specs

Q-Pre 4-Channel Microphone Preamp Specifications:

Audio Inputs:
  • Connectors: 1/4" jack
  • Type: balanced
  • Impedance: 2KOhms
  • Min Sensitivity: -40dB
  • Peak input level: +5dB
  • Gain control range: 50dB
  • Peak amplification: 74dB
  • Phantom power: +48V, switchable
Audio Outputs
  • Connectors: 1/4" jack
  • Type: TRS balanced
  • Impedance: -10dB 47k
  • Peak output level: +18.5dB
Dist, Freq, S/N Ratio & Crosstalk:
  • Frequency response: 20Hz20kHz, 0dB-2B
  • Distortion: 0.02%
  • S/N Ratio: better than 80dB
  • Crosstalk rejection: >70dB@1kHz;-20dB input
Power Supply:
  • Mains voltages: USA/Canada 120 V AC, 60Hz
  • Power consumption: 8.5VA
  • Fuse: 100-120V AC: 315mA (slow-blow), 200-240 V AC: 315mA (slow-blow)
  • Mains connection: Using External Power Supply 16Vac
  • Dimensions (HxWxD) 1-3/4" (44.5mm) x 19" (482.6mm) x 8 1/2" (217mm)
  • Net weight: approx. 3.4kg
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