Aphex Dual RPA 500 Tube Microphone Preamp

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Product Description

The new Aphex Dual RPA 500 Tube Microphone Preamp was created with the inspiration of 207D and Channel preamps. This two channel Mic Preamp has the Mic-Limiter technology held by Aphex, 207D and 1788A that works before the preamp. Clipping the input would be nearly impossible with the limiter on. The main applications of this Microphone Preamp are both live performances and professional studio recording. Aphex's Mic Limiting technology is used in every input and is great for live performances. Professional recording utilizes the Dual RPA 500 because of its tube back end that has warmth and gain, while still having the fast response of the solid state front end.

Aphex Dual RPA 500 Tube Microphone Preamps Feature:

  • 3 Way switches selects 16, 20 or 24dBu output levels
  • 20 segment input meter clearly displays input levels
  • 65 dB of gain for operation of dynamic, condenser, and ribbon microphones
  • 26 dB pad for very loud sources
  • Illuminated buttons for Phase Reverse, 75Hz high Pass Filer, Phantom Power, and Mic Limiter on-off
  • Front panel 10Mohm 0.25 inch instrument connection inputs
  • Front panel inputs override the rear inputs in the receiving frame


Professional recording studios also enjoy the 0.25 inch input so that its super easy running instruments through the Mic Preamp. Studios dont have to sacrifice sound and response for anything with this hybrid Mic Preamp. Live performances benefit a lot from the Mic Lim circuit that limits transients before the preamp. The effects of the circuit are there wont be clipping in the preamp or anywhere else down the path. For the perfect use of a Dual RPA 500, use on overhead mics, a drum kit, or a snare drum.

Product Specifications
Transformerless, Instrumentation first stage, RPA tube second stage
Impedance: 2.2k ohm nominal
Instrument Impedance: 10M ohm nominal
CMRR: >70dB at 60Hz
Gain Range: +25dB to +61dB, no pad is +24 level
Pad: 26dB
Max Input Level, limiter off: 0dBu - no pad, +26dBu - pad
Limiter: Aphex MicLim
Low Cut: 2rd order, -3dB at 65Hz
Type: Active true-balanced
Nominal Level: +4dBu
Maximum Level, Meter 0dB: +24/+20/+16 dBu switchable
Impedance: 100 ohm nominal
THD: <0.15% at +4dBu out
Frequency Response: +0.1/-1.0dB <10Hz to >100kHz
EIN: -124dBu at max gain
Current draw: 160mA per slot, 320mA total
Helpful Info about the Manufacturer
Phone:  818-767-2929 Warranty:  1 Year
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