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Trilogy Audio SPD H1 Electrostatic Headphone Amplifier

Trilogy Audio SPD H1 Electrostatic Headphone Amplifier
Trilogy Audio SPD H1 Electrostatic Headphone AmplifierTrilogy Audio SPD H1 Electrostatic Headphone AmplifierTrilogy Audio SPD H1 Electrostatic Headphone Amplifier
(£4,162.50 Exc. VAT)

Delivery In 5-7 Days

Free U.K. Delivery


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Trilogy Audio
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Trilogy Audio SPD H1 Electrostatic Headphone Amplifier

Fully Balanced Valve Electrostatic Headphone Amplifier!

Head of the curve Trilogy has opted to fittingly make the first Special Products Division a component where nuance and tangibility is etched in fine detail - the electrostatic headphone energiser. A fitting first statement product for Trilogy Audio Systems SPD range, built with meticulous sonic craftsmanship. 

After trialling  variations of the Stax circuit used by many other manufacturers  Nic Poulson realised that accepted wisdom and circuitry  failed to advance the product to Trilogy design goals, to only ever evolve and improve.

The SPD H1 circuit is unique in terms of a solution. The design consists of two toroidal transformers, one for heating the triodes, the other for the rest of the H1. The vacuum tube circuit utilises high transconductance type military specification tubes. One pair of 6C3 input tubes and one pair of 6H6 output tubes, having a service life of approximately 5000 hours and can simply be returned to Trilogy for replacement.

The H1 is a pure Class A fully balanced circuit with both wide bandwidth and zero feedback giving a pure communication between the listener and the music. Naturally on this no compromise design wiring is teflon coated point to point silver plated copper. The Stax sockets are PTFE/Teflon with gold plated contact surfaces.

The H1 provides palpable bass and a forthright and authoritative midrange, in addition to the quality airiness that electrostatic headphones are so renowned  for. The ephemeral yet conversely frustrating qualities of the traditional experience of electrostatic headphone presentation have been addressed. It has taken time to reverse conventional thinking, but the result was worth it. Experience the openness and pure escapism the H1 provides.

To the rear the SPD H1 features 4 inputs/ 2 x RCA 2 x XLR, and one pair of Stax sockets elegantly recessed into the front fascia.

We make a direct mode model (DMV) which allows the user to select inputs remotely and a more fully functioned remote that includes additional operations as volume/balance and mute. The direct mode model (DMV) may be upgraded to the full featured remote version by simply returning to Trilogy for chip and firmware updates.

As with any Stax compatible energiser Performance is dependent on the quality of the source i.e. CD players analogue output stage, and quality of other manufacturers digital volume controls, but the buyer of the H1 rest assured that Trilogy once again, has redefined the standard by which Stax compatible energisers must be judged by and must be experienced to be believed.

Shipping typically 5-7 days
  • Size: 260*392*88 (W*D*H)
  • Size including connectors: 260*405*88 (W*D*H)
  • Weight: 6.7Kg
  • Packaged Size (combined): 590*510*260
  • Packaged Weight (combined): 9.2 Kg
  • Power consumption: 55 Watts
  • Power consumption (standby): 1 Watt
  • Inputs Balanced: 2 pairs of XLR 3pin female
  • Inputs Single Ended: 2 pairs of RCA phono sockets
  • Input Impedance Single Ended: ≥33 KOhms
  • Input Impedance Balanced: ≥66 KOhms
  • Gain (max): 56dB
  • Frequency response: 10-50 KHz +/- 0.5dB
  • Valve Complement: 4* 6C3PI, 2* 6H6PI
  • Phase: Phase correct (non inverting)
  • Bias Voltage: 580VDC

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 (5-7 days) which provides comprehensive tracking of shipments online.
  • £50 delivery charge 'Flat Fee' via DHL Europe by Air service  (2-3 days) which provides comprehensive tracking of shipments online.
    Receiver is responsible for the payment of local Duties and Taxes.

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 12 months to 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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