AEA TRP500 Microphone Preamplifier

AEA TRP500
AEA TRP500
AEA TRP500
The AEA TRP500 500-series preamp delivers 85 dB of quiet JFET gain, ultra-high 100 kΩ impedance, and a switchable high-pass filter, optimised for ribbons but exceptional with all microphones.

AEA TRP500 Microphone Preamplifier Details

The AEA TRP500 is the first product in AEA’s third generation of microphone preamps, delivering up to 85 dB of effortless, low-noise DC-coupled JFET gain in a compact 500-series format.

While designed with ribbon microphones in mind, its rich, musical character and ultra-high input impedance also make it an exceptional partner for dynamic, condenser, and vintage tube microphones. Unlike many “clean” preamps, the AEA TRP500 balances neutrality with warmth, enhancing the natural tonality of any microphone.

Based on the proven circuit topology of the original TRP preamp, the AEA TRP500 is optimised to extract the full potential of passive ribbons, offering two selectable input impedances: 11.9 kΩ with phantom power on, and a remarkable 100 kΩ with phantom power off. The high-impedance mode ensures unmatched sensitivity, bandwidth, and transient response, particularly for ribbons, vintage dynamics, and tube mics.

A gentle, switchable high-pass filter (-3 dB at 115 Hz or 230 Hz) is included to manage proximity build-up or low-frequency rumble, while a wide gain range and output trim provide full control.

Handcrafted in Pasadena, California, from locally sourced parts, the AEA TRP500 reflects AEA’s dedication to precision engineering and musicality, making it a powerful yet compact tool for studio and professional recording environments.

Features

  • Single-channel, 500 series format
  • 85dB of quiet, DC-coupled JFET gain
  • Ultra-high impedance (66,000 Ohms)
  • Switchable 115 Hz or 230 Hz high-pass filter
  • Switchable phantom power and polarity reverse

Specifications

Released in 2022
Made in: U.S.A.
  • Max gain at 1 kHz: 85 dB (balanced-in to balanced-out)
  • EIN (Max gain, 22 Hz–22 kHz, unweighted): Typically -130 dBu, <-128 dBu (40 Ω source)
  • DC current draw: 130 mA (from ±16 V rails)
  • Frequency response:
    • 30 dB gain: +0/-0.6 dB (<10 Hz–200 kHz)
    • 85 dB gain: +0/-1 dB (<20 Hz–>100 kHz), +0/-2.5 dB (<10 Hz–200 kHz)
  • THD+N: 0.0017% (1 kHz, 22 Hz–22 kHz @30 dB gain, +4 dBu output)
  • XLR output max level: +28.5 dBu into 600 Ω (before 1% THD)
  • Input impedance: 11.9 kΩ (phantom on), 100 kΩ (phantom off)
  • Output impedance: 50 Ω
  • Max input signal level: +21.5 dBu at minimum gain (before 1% THD)
  • Mic gain control: 12-position switch, +7 dB to +65 dB
  • Output trim: Continuously variable, 0 dB to +20 dB
  • High-pass filter: Switchable first-order, -3 dB at 115 Hz or 230 Hz
  • XLR polarity: Pin 1 ground, Pin 2 high, Pin 3 low
  • LED signal level indicators: Green = -20 dBu, Yellow = 0 dBu, Red = +20 dBu (clip warning, 8 dB before clipping)
  • Dimensions: 38.1mm x 172.7mm x 132.1mm
  • Weight: 0.29 kg
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