Metrum Aurix Headphone Amplifier

Metrum Aurix Headphone Amplifier
Metrum Aurix Headphone AmplifierMetrum Aurix Headphone AmplifierMetrum Aurix Headphone Amplifier
(£720.83 Exc. VAT)
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  • Transparent sound image
  • Low noise and low distortion
  • Amplification using two transistors and a step-up transformer
  • Current delivery full Class A
  • Non feedback design
Metrum Acoustics
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Why buy from us?

Metrum Aurix Headphone Amplifier

When Metrum were requested to develop a headphone amplifier, it had to be something special. Also the product had to be combined physically with their Octave DAC MKII. The result is the Aurix.

Not an ordinary design like many, but a real improvement on existing principles. Rather than using transistors or tubes for amplification a special step-up transformer is used. Said solution solves many problems as known in regular low gain amplifier designs and provides a very transparent sound image.

Only two FET transistors are in the signal path as an impedance converter (source follower, no amplification) and it is this property where a FET transistor can do an extremely good job and delivers a very high bandwidth having low noise and low distortion. The first Fet is used as an impedance converter to drive the step-up transformer. The second FET is used to drive the headphone. The circuits are running in full "Class A" so that a relatively large heatsink is required to flow the heat .

Besides the amplifier part we have used a lot of electronics just for creating the right conditions for the amplifier part and protecting your headphone against subsonics, offsets, pops and clicks. The result is a sound that is mainly determined by the connected source.

Shipping typically 5-7 days
  • Output: Max. 6 Volts RMS to 600 Ohm load, Max. 2 Volts RMS to 33 Ohm load 
  • Gain: Gain of 1 or 3 (+10dB) selectable by switch on back panel
  • Principle: Amplification using two transistors and a step-up transformer. Current delivery full Class A. Non feedback design.
  • Frequency response: 5Hz to 60kHz -3dB
  • Distortion: Max. 0.01% THD ,600 Ohm load. Max 0.5% THD 33 Ohm load. 
  • Signal to noise: -120 dB related to 2 Volts RMS
  • Protection: Start-up Offset and subsonic frequencies.
  • Consuming power: Max. 30 VA

UK Delivery

  • FREE delivery via DPD Local By 12pm on orders to value over £300, including one hour delivery window service 'Predict & Follow My Parcel'.
  • Royal Mail Special Delivery By 1pm costs between £5.00 - £10.00 on orders to value under £300, dependent on weight.
  • Saturday or Sunday delivery available upon request for supplemental charge.

EU Delivery

  • £25 delivery charge 'Flat Fee' via DHL Europe by Road service (3-5 days) which provides comprehensive tracking of shipments online.
  • £60 delivery charge 'Flat Fee' via DHL Europe by Air service  (1-2 days) which provides comprehensive tracking of shipments online.

USA & Canada Delivery

  • Services based on your order being shipped to the U.S. and Canada are calculated as follows:
    £100 delivery charge 'Flat Fee' via DHL international 'Day Definite' service per parcel.
    Receiver is responsible for the payment of local Duties and Taxes.


  • Not all products are available for order into Europe, USA & Canada


  • Full manufacturer's warranty on all new purchases. Standard warranty is typically 2 years with some goods coming with 6 years manufacturer's warranty.
  • Goods purchased in UK and EU are covered by the Consumer Contracts Regulations.

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