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Aphex Dual RPA 500 2-Ch Solid State Tube Hybrid Mic Preamp 500 Series Lunchbox Module

by Aphex
£799.00 inc. vat
£665.83 ex. vat
Usually Ships in 1-3 Business Days.

The Aphex Dual RPA 500 is a 500 series two channel, tube mic pre inspired by the popular Channel and 207D preamps.  The DUAL RPA 500 features the Aphex patented Mic-Limiter technology from the 207D and 1788A that works before the preamp.  With the limiter on, it is nearly impossible to clip the input of the preamp.

Aphex Dual RPA 500 Features

  • Front panel 10Mohm, ¼” inputs for the connection of instruments like guitar and bass. These inputs override the inputs on the rear of the receiving frame when connected.
  • 3-way switches allow the selection of +16, +20 or +24dBu output levels.
  • The 20-segment input meters allow input levels to be easily seen, even from a distance.
  • 65 dB of gain to properly operate dynamic, condenser and ribbon microphones and a 26dB pad for very loud sources.
  • Illuminated buttons control Phantom Power, Phase Reverse, 75Hz High Pass Filter and Mic Limiter on/off.


Live Performance- One of the reasons that the 207D is so popular for live performance is because of the patented Mic Lim technology featured on each input.  The Mic Lim circuit limits transients before the preamp, protecting the preamp from clipping and anything later in the signal path from receiving a clipped signal.  The DUAL RPA 500 with Mic Lims is perfect for use on snare drum, kick drum or drum kit overhead mics.

Professional Studio Recording-The DUAL RPA 500 is a hybrid with a solid state front end for a fast transient response and a tube back end for warmth and gain.  It’s the best of both worlds!  The ¼” input also makes it easy to run instruments through the mic pre without using a direct box.

Aphex Dual RPA 500 Specifications


  • Type: Transformerless, Instrumentation first stage, RPA tube second stage
  • Impedance: 2.2k ohm nominal
  • Instrument Impedance: 10M ohm nominal
  • CMRR: >70dB @ 60Hz
  • Gain Range: +25dB to +61dB (no pad, +24 level)
  • Pad: 26dB
  • Max Input Level (limiter off): 0dBu (no pad), +26dBu (pad)
  • Limiter: Aphex MicLim
  • Low Cut: 2rd order, -3dB @ 65Hz 


  • Type: Active true-balanced
  • Nominal Level: +4dBu
  • Maximum Level (Meter 0dB): +24/+20/+16 dBu switchable
  • Impedance: 100 ohm nominal 


  • THD: <0.15% @ +4dBu out
  • Frequency Response: +0.1/-1.0dB <10Hz to >100kHz
  • EIN: -124dBu @ max gain


  • Current draw: 160mA per slot, 320mA total