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Ashly TRA-4150


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Product Overview

TRA Series Multimode Amplifiers

For amplifiers with more modest power requirements, consider the TRA 2- or 4-channel with Transformer-isolated output @ 4Ω, 8Ω, 70V or 25V in a rugged two rack spaces unit.

Ashly’s TRA-Series expands on the SRA’s concept of “the right amp for the job.” These 2RU amplifiers utilise our state of the art technology to create advanced, efficient amplifiers perfect for low impedance, 25V, 70V or 100V installations with modest power requirements. Four models available in two and four-channel configurations, with power ratings of 75W and 150W per channel @ 4 ohms, 70V and 100V.

All audio controls of the TRA-Series amplifiers are on the rear panel or internal. A six-step LED meter for each channel lets you monitor all levels. All TRA amplifiers can drive four or eight ohm loads and 25V or 70V and 100V constant voltage lines simultaneously. Output transformers are internally mounted. The 150W models are capable of driving 25V constant voltage lines using the direct coupled 4 ohm output.

TRA-Series amplifiers incorporate a switch-mode-power supply and Class-D amplifier circuitry, providing an extremely power-efficient solution. All TRA Series amplifiers are convection-cooled, so there’s little maintenance after the installation, and no annoying fan noise. Of course you get the reliability, superior sonic quality and rugged construction you’ve come to expect from Ashly.

Features include: convection cooling, extremely low noise, extensive protection circuitry, Euroblock inputs and Euroblock outputs. Front panel features include: mains power switch and an LED signal level meter indicating –24dB, -18dB, -12dB, -6dB, -3dB and clip alert for each channel. Rear panel features include: level attenuators for each channel, rear panel switches to select between two choices of input sensitivity, remote power turn-on/off and adjustable turn-on delay up to eight seconds.



  • Convection cooling
  • Extremely low noise
  • Internally Mounted Constant Voltage Transformers
  • Extensive protection circuitry
  • Safety/Compliance: cTUVus, CE, FCC, RoHS

Front panel:

  • 6-Step Signal Level and Clip LEDs

Rear panel:

  • Level attenuators for each channel
  • Euroblock inputs
  • Euroblock outputs
  • Selectable input sensitivity
  • Remote power turn-on/off
  • Adjustable turn-on delay up to eight seconds

Watts per channel:

  • 8 ohms: 80
  • 4 ohms: 150
  • 25V/70V/100V: 150/150/150


Full specifications are available under the Downloads tab above

Product Downloads

  • TRA-4150 User Manual PDF 0.8 MB
  • TRA-4150 Data Sheet PDF 1.7 MB


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*Prices are in AUD, include GST and are subject to change. Please call National Audio for pricing and availability on the TRA-4150.