JDK Audio R20 Two-Channel Microphone Preamp

The JDK Audio MP R-20 is a dual channel, high quality microphone preamp, designed from the ground up by API's design team to offer a versatile high quality input for Mmicrophones as well as instruments.

Each channel features both a mic and an instrument input, with switched phantom power, phase and pad.  Metering is traditional analog VU.

Features:

• Dual mic preamplifiers with 54 dB of gain
• Custom analog VU meters for monitoring output level
• Front panel, high-impedance instrument input with 45 dB of gain
• Peak indicator
• Pad switch attenuates the microphone signal by 20 dB, or the instrument signal by 10 dB
• Switchable 48v phantom power
• Low distortion, low noise circuitry
• Fully balanced output, both 1/4" and XLR

The MP-R20 provides two channels of premium analog microphone pre-amplification designed to provide a low noise, solid front end for all audio applications. Meticulously detailed and solidly constructed, the R20 features custom analog VU meters and hands-on analog control of the gain level.  Individual toggle switches control the selection of 48v, polarity, pad and a mic/instrument switch.

Specifications:

• Inputs: Balanced XLR mic jack (rear) Un-balanced 1/4" instrument jack (front)
• Outputs: Balanced XLR and 1/4" parallel jacks
• Microphone Input
  • Gain: +55db (no pad), +36db (w/pad)
  • Min Gain: +9db (no pad), -10db (w/pad)
  • Pot gain range: 46db
  • Pad: -20db
  • Input impedance: 6.8K Ohms
  • THD+N @ 1Khz, +4dbu: 0.013%
  • Bandwidth: +/- 0.5db, 20hz - 50Khz
  • THD+N @ 1Khz, +4dbu: 0.013%
  • Maximum level: +20dbu
  • Signal-to-noise ratio: -90db
• Instrument Input
  • Max gain: +31db (no pad), +21db (w/pad)
  • Min gain: +10db (no pad), 0db (w/pad)
  • Pot gain range: 21db
  • Pad: -10db
  • Input impedance: 500K Ohms
  • Bandwidth: +/- 0.5db, 20hz - 20Khz
  • THD+N @ 1Khz, +4dbu: 0.002%
  • Maximum level: +20dbu
• Signal-to-noise ratio: -80db
• Current: 65mA, 7.3 VoltAmps
• Dimensions: 2u EIA 19" rack
• Height: 3.5"
• Width: 19"
• Depth: 10"
• Weight: 12 lbs