Trilogy Audio 931 Headphone Amplifier

Trilogy Audio 931 Headphone Amplifier
  Zoom
 Trilogy Audio 931 Headphone AmplifierTrilogy Audio 931 Headphone Amplifier 
£995.00
(£829.17 Exc. VAT)
  

In Stock

Free U.K. Delivery

Availability

Enquire now to purchase
01892 532 995

Free standard UK delivery
  • High current design
  • Two inputs
Secured by Thawte

Why buy from us?

Trilogy Audio 931 Pure Class A Single Ended Headphone Amplifier (1 box)

Affordable but still Trilogy through and through. Discreet Class A circuit with an oversize linear power supply. An audiophile delight for ears and eyes.

The way we listen constantly changes and evolves, more of us are now interested in quality headphone listening than ever before. Following the overwhelmingly positive reception of the 933, which exceeded all our expectations, we decided to make a headphone amplifier with a wider reach. The brief for the 931 project was short but demanding: keep all of the essential elements that make the highly acclaimed 933 so successful, but at a significantly lower cost. There is real challenge in engineering and manufacturing a design without raising costs and also keeping compromise at bay as much as possible. We are extremely proud of the result. The 931 may be affordable, but its performance and quality is still pure Trilogy.

The small, light drivers found in headphones are very closely coupled to the ear and as a result are ruthlessly revealing. They require a completely different design approach to moving the multi driver, complex load of a loudspeaker in a listening room. The 931 is a fully discrete design, no generic integrated circuits or op-amps are used. Designer Nic Poulson could then use all his skills in analogue design to control all the active circuit’s crucial parameters, optimising performance for this intended application only.

Like its bigger brother the 933, the audio circuit operates in pure single ended Class A with active constant current sources. Each channel has a single continuously biased output device. The main benefits of this topology are that the output is free from crossover distortion, and the device is held at a constant temperature. An oversized linear power supply is implemented with a custom low flux density toroidal transformer and low ESR reservoir capacitors. This provides a low noise supply for the active circuitry with generous operating headroom. All these elements combine to give excellent small signal resolution while maintaining good drive capability for any type of headphone.

On the CNC machined aluminium front panel a 6.3mm type B stereo jack provides the output. There are toggles for power and input select for two stereo line inputs. A quality ALPS volume control is coupled to a beautifully weighted custom machined control knob. The rear panel offers the user two selectable stereo inputs via high quality gold plated phono connectors and the fused IEC mains inlet.

The 931 can connect easily to any existing preamplifier or directly to two stereo sources as a standalone solution for high resolution headphone listening. We have maintained the same painstaking attention to build quality with the 931 as with all our designs. Quality components from branded sources are used throughout. Assembly is totally by hand in our UK workshops.

The output devices dissipate enough heat to need heatsinking. An extruded off the shelf heatsink would serve here, but we chose to employ a custom CNC machined part. Semiconductors are sensitive to mechanical vibration and their operating characteristics vary with temperature. By attaching the output devices to a high mass with low mechanical resonance and large thermal inertia, the increase in resolution more than offsets the increased manufacturing difficulty.

The standard finish is a soft natural silver, enhancing the quality of the beautifully finished casework. Our lustrous paint finishes are a luxurious option for those wishing to add their own individual touch. A vast range of custom colours can be specified for your 931 through our Chameleon System. Intelligent design can overcome the constraints of finite resources. The 931 carries all the traits that make its bigger brethren such involving musical performers. Delivering natural sound, detailed, spacious and communicative and a joy to own, the 931 is indisputably Trilogy through and through.

Shipping typically 2-3 days

The way we listen constantly changes and evolves, more of us are now interested in quality headphone listening than ever before. Following the overwhelmingly positive reception of the 933, which exceeded all our expectations, we decided to make a headphone amplifier with a wider reach.  The brief for the 931 project was short but demanding: keep all of the essential elements that make the highly acclaimed 933 so successful, but at a significantly lower cost. There is real challenge in engineering and manufacturing a design without raising costs and also keeping compromise at bay as much as possible. We are extremely proud of the result. The 931 may be affordable, but its performance and quality is still pure Trilogy.

The small, light drivers found in headphones are very closely coupled to the ear and as a result are ruthlessly revealing. They require a completely different design approach to moving the multi driver, complex load of a loudspeaker in a listening room. The 931 is a fully discrete design, no generic integrated circuits or op-amps are used. Designer Nic Poulson could then use all his skills in analogue design to control all the active circuit’s crucial parameters, optimising performance for this intended application only.

Like its bigger brother the 933, the audio circuit operates in pure single ended Class A with active constant current sources. Each channel has a single continuously biased output device. The main benefits of this topology are that the output is free from crossover distortion, and the device is held at a constant temperature. An oversized linear power supply is implemented with a custom low flux density toroidal transformer and low ESR
reservoir capacitors. This provides a low noise supply for the active circuitry with generous operating headroom. All these elements combine to give excellent small signal resolution while maintaining good drive capability for any type of headphone.

On the CNC machined aluminium front panel a 6.3mm type B stereo jack provides the output. There are toggles for power and input select for two stereo line inputs. A quality ALPS volume control is coupled to a beautifully weighted custom machined control knob. The rear panel offers the user two selectable stereo inputs via high quality gold plated phono connectors and the fused IEC mains inlet.

The 931 can connect easily to any existing preamplifier or directly to two stereo sources as a standalone solution for high resolution headphone listening. We have maintained the same painstaking attention to build quality with the 931 as with all our designs. Quality components from branded sources are used throughout. Assembly is totally by hand in our UK workshops.

The output devices dissipate enough heat to need heatsinking. An extruded off the shelf heatsink would serve here, but we chose to employ a custom CNC machined part. Semiconductors are sensitive to mechanical vibration and their operating characteristics vary with temperature.

By attaching the output devices to a high mass with low mechanical resonance and large thermal inertia, the increase in resolution more than offsets the increased manufacturing difficulty.

The standard finish is a soft natural silver, enhancing the quality of the beautifully finished casework. Our lustrous paint finishes are a luxurious option for those wishing to add theirown individual touch. A vast range of custom colours can be specified for your 931 through our Chameleon System.

Intelligent design can overcome the constraints of finite resources. The 931 carries all the traits that make its bigger brethren such involving musical performers. Delivering natural sound, detailed, spacious and communicative and a joy to own, the 931 is indisputably Trilogy through and through.

  • Size:  140*237*50 (W*D*H)
  • Size including connectors:  140*244*50(W*D*H)
  • Packaged Size:  240*350*85 (W*D*H)
  • Weight:  1.7 Kg
  • Packaged Weight:  2.3 Kg
  • Power consumption:  16 Watts
  • Inputs:  2 Stereo line 4 RCA phono sockets
  • Input Impedance:  ≥50K Ohms
  • Gain: (max)  18dB
  • Frequency response:  20-20KHz +/- 0.5dB
  • Output impedance:  ≤ 10 Ohms
  • Output Power:  800mW into 60 Ohms, 200mW into 300 Ohms
  • Distortion (THD): ≤ 0.05% 10mW into 300 Ohms
  • Signal to Noise Ratio: ≥ 85dB A Weighted
  • Phase:  Phase correct (non inverting)

 Specification subject to change

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.

Exceptions

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

WARRANTY

  • 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.

Be the first to Write a Review for this item!

Related Products
Trilogy Audio 906 Phono Stage
Trilogy Audio 906 Phono Stage
  In Stock
£995.00
Trilogy Audio 907 Phono Stage
Trilogy Audio 907 Phono Stage
  In Stock
£2,895.00
Trilogy Audio 933 Headphone Amplifier
Trilogy Audio 933 Headphone Amplifier
  In Stock
£2,795.00

Reserve this item

Fill in the form below to reserve this item for purchase in store.

Your Name: *
Email Address: *
Telephone: *
Current System:
Other Information/finish:
 *
Please add the two numbers
Cancel

Price Match

If you have seen one of our products cheaper elsewhere, let us know. We will check it out and match the price. Simply fill in the following form and click 'Submit' to send it to our staff.

Your Name: *
Your Email Address: *
Phone Number: *
Name of cheaper supplier:
Price (inc VAT) at other supplier: *
Web address of the other item: *
 *
Please add the two numbers
Cancel

Ask a Question

Your Name: *
Your Email: *
Phone Number:
Your Question: *
Current System?
 *
Please add the two numbers
Cancel

Speak to an expert 01892 532 995 Mon - Sat 9am - 5.30pm