Trilogy 931 Headphone Amplifier Headphone Amplifiers

Trilogy 931 Headphone Amplifier

  • Product Code: 931
  • £995.00

Trilogy 931 Headphone Amplifier

The way we listen constantly changes and evolves, more of us are now interested in quality headphone listening than ever before. Following the overwhemingly positive reception of the Trilogy 933, which exceeded all Trilogy's expectations, Trilogy decided to make a headphone amplifier with a wider reach.

The brief for the Trilogy 931 project was short but demanding: keep all of the essential elements that make the highly acclaimed Trilogy 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. Trilogy are extremely proud of the result. The Trilogy 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 Trilogy 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 Trilogy 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 Trilogy 931 can connect easily to any existing preamplifier or directly to two stereo sources as a stand alone solution for high resolution headphone listening.

Trilogy have maintained the same painstaking attention to build quality with the Trilogy 931 as with all Trilogy  designs. Quality components from branded sources are used throughout. Assembly is totally by hand in Trilogy UK workshops.

The output devices dissipate enough heat to need heatsinking. An extruded off the shelf heatsink would serve here, but Trilogy 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. Trilogy's 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 Trilogy Chameleon System.

Intelligent design can overcome the constraints of finite resources. The Trilogy 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 Trilogy 931 is indisputably Trilogy through and through.

Headphone Amplifiers
Frequency Range 20-20KHz +/- 0.5dB
Inputs 2 Stereo line 4 RCA phono sockets
Gain 18dB
Input Sensitivity/Impedance /≥50K Ohms
Power Output 800mW into 60 Ohms, 200mW into 300 Ohms
Dimensions (H x W x D) - Unit 50mm x 140mm x 237mm ( 50mm x 140 x 244mm with connectors)
Weight - Unit 1.7 KG

3 Years Warranty - Terms and Condition Apply

At Audio Destination we use various delivery methods to suit various needs from standard Royal Mail services (1st Class,Recorded or Special Delivery) to a fully insured courier service (one we have used for many years) depending on size,weight and cost of item.

Postage costs will show at checkout.

One thing customers can rely upon is Audio Destination will do whatever we can to get the item you have purchased to you as quickly as possible but again we will inform you if there are likely to be any delays.

Should any problems arise or any special request need to be catered for then please call us on 01884 243584 (and ask for Mike or Caroline) or leave a message in the comments section when ordering and this way we can make your experience of ordering from Audio Destination as enjoyable as possible.

Trilogy 931 Headphone Amplifier

The way we listen constantly changes and evolves, more of us are now interested in quality headphone listening than ever before. Following the overwhemingly positive reception of the Trilogy 933, which exceeded all Trilogy's expectations, Trilogy decided to make a headphone amplifier with a wider reach.

The brief for the Trilogy 931 project was short but demanding: keep all of the essential elements that make the highly acclaimed Trilogy 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. Trilogy are extremely proud of the result. The Trilogy 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 Trilogy 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 Trilogy 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 Trilogy 931 can connect easily to any existing preamplifier or directly to two stereo sources as a stand alone solution for high resolution headphone listening.

Trilogy have maintained the same painstaking attention to build quality with the Trilogy 931 as with all Trilogy  designs. Quality components from branded sources are used throughout. Assembly is totally by hand in Trilogy UK workshops.

The output devices dissipate enough heat to need heatsinking. An extruded off the shelf heatsink would serve here, but Trilogy 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. Trilogy's 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 Trilogy Chameleon System.

Intelligent design can overcome the constraints of finite resources. The Trilogy 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 Trilogy 931 is indisputably Trilogy through and through.

Headphone Amplifiers
Frequency Range 20-20KHz +/- 0.5dB
Inputs 2 Stereo line 4 RCA phono sockets
Gain 18dB
Input Sensitivity/Impedance /≥50K Ohms
Power Output 800mW into 60 Ohms, 200mW into 300 Ohms
Dimensions (H x W x D) - Unit 50mm x 140mm x 237mm ( 50mm x 140 x 244mm with connectors)
Weight - Unit 1.7 KG

3 Years Warranty - Terms and Condition Apply

At Audio Destination we use various delivery methods to suit various needs from standard Royal Mail services (1st Class,Recorded or Special Delivery) to a fully insured courier service (one we have used for many years) depending on size,weight and cost of item.

Postage costs will show at checkout.

One thing customers can rely upon is Audio Destination will do whatever we can to get the item you have purchased to you as quickly as possible but again we will inform you if there are likely to be any delays.

Should any problems arise or any special request need to be catered for then please call us on 01884 243584 (and ask for Mike or Caroline) or leave a message in the comments section when ordering and this way we can make your experience of ordering from Audio Destination as enjoyable as possible.

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