Trilogy 931i Headphone Amplifier

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2432

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1 179,51 €

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Description

Trilogy 931 (now improved 931i) Headphone Amplifier

The way we listen constantly moves and evolves. With more of us interested in quality headphone listening than ever before, we decided to make a headphone amplifier with a wider reach. The brief for the 931 project was to keep all of the essential elements that make the highly acclaimed 933 so successful but at a significantly lower cost. 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 are used, so designer Nic Poulson can control all the active circuit's crucial parameters, optimising performance for its 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 gives good operating headroom for the active circuitry. All these elements combine to give excellent small signal resolution while maintaining good drive capability.

There are two stereo line inputs, audio grade ALPS volume control and quality components from branded sources 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. The sound quality benefits of attaching the output devices to a high mass with low resonant signature and large thermal inertia more than offset the increased costs.

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 (contact us).

Intelligent design can overcome the constraints of finite resources. The 931 carries all the traits that make its bigger brethren such involving musical performers. Detailed, spacious, communicative, the 931 is indisputably Trilogy through and through.

Specifications
 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)

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Introduzione alla Trilogy Audio Systems

'The essence of music

- engineered'

From a passion to remain true to the essence of music, and by keeping all the key design elements in harmony, we create products of true quality.

Look at the objects around you in your home or work place; the chances are much of what you see is the end result of derivative thinking. By bringing a small improvement to what already exists; a commercial niche is filled and a small advantage over your competitors is gained. Here at Trilogy Audio Systems we do things differently. 

"Making some of the best-looking, best-finished and - appropriately - best-sounding kit in the UK today, but rarely shouting about it, is Trilogy." 

KEN KESSLER - HIFI NEWS

Nic Poulson is the principal designer of all Trilogy Audio Systems products.

Nic's background was originally in broadcast engineering, training with the BBC in the eighties. The corporation's legendary high standards made a deep impression on him. He learned that the way to achieve true quality is to strive for excellence in every area and accept nothing less. He went on to found Trilogy in 1990 and quickly earned a reputation for producing designs that reflected his core values of performance, reliability, pride of ownership and value for money.

Nic's designs can also be found in runway lighting systems, guiding aircraft safely to land at major airports across the UK. His success in the exacting industry of aviation is further confirmation of his breadth and versatility as a designer.

After studying in depth the inherent weaknesses in most mains derived power supplies, and their surprising impact on sound quality, Nic founded Isotek and revolutionised the concept of mains conditioning. Now the creative force behind Isol-8 Teknologies, he has delivered award winning designs which display none of the negative qualities shown by previous generations of mains conditioners. His products have taken the audio community by storm and are sold to discerning users worldwide.

His design philosophy is the key to understanding all Trilogy products.

Instead of deciding a price point and assembling a product steering committee chaired by a marketing manager, Nic goes back to first principles: identifying the fundamental questions at the core of each design issue. By carefully addressing and optimising each electrical design element to deliver the optimum solution, his goal of minimum compromise is achieved.

We complement this by taking great care over the realisation of the design. Beauty, reliability and user friendliness are essential qualities that must be present as a design makes its way through the myriad processes that make a physical real world product.

These are the reasons why our designs are enduring. From a passion to remain true to the essence of music, and by keeping all the key design elements in harmony, we create products of true quality.

Several years in the making, the latest generation of Trilogy Audio Systems components remain true to our original core values. Engineered from the inside out with real heart and soul behind them, they will provide lasting satisfaction, making music for your pleasure. We hope you will share the experience with us soon.

 
Designer

'The essence of music

- engineered'

From a passion to remain true to the essence of music, and by keeping all the key design elements in harmony, we create products of true quality.

Look at the objects around you in your home or work place; the chances are much of what you see is the end result of derivative thinking. By bringing a small improvement to what already exists; a commercial niche is filled and a small advantage over your competitors is gained. Here at Trilogy Audio Systems we do things differently. 

"Making some of the best-looking, best-finished and - appropriately - best-sounding kit in the UK today, but rarely shouting about it, is Trilogy." 

KEN KESSLER - HIFI NEWS

Nic Poulson is the principal designer of all Trilogy Audio Systems products.

Nic's background was originally in broadcast engineering, training with the BBC in the eighties. The corporation's legendary high standards made a deep impression on him. He learned that the way to achieve true quality is to strive for excellence in every area and accept nothing less. He went on to found Trilogy in 1990 and quickly earned a reputation for producing designs that reflected his core values of performance, reliability, pride of ownership and value for money.

Nic's designs can also be found in runway lighting systems, guiding aircraft safely to land at major airports across the UK. His success in the exacting industry of aviation is further confirmation of his breadth and versatility as a designer.

After studying in depth the inherent weaknesses in most mains derived power supplies, and their surprising impact on sound quality, Nic founded Isotek and revolutionised the concept of mains conditioning. Now the creative force behind Isol-8 Teknologies, he has delivered award winning designs which display none of the negative qualities shown by previous generations of mains conditioners. His products have taken the audio community by storm and are sold to discerning users worldwide.

His design philosophy is the key to understanding all Trilogy products.

Instead of deciding a price point and assembling a product steering committee chaired by a marketing manager, Nic goes back to first principles: identifying the fundamental questions at the core of each design issue. By carefully addressing and optimising each electrical design element to deliver the optimum solution, his goal of minimum compromise is achieved.

We complement this by taking great care over the realisation of the design. Beauty, reliability and user friendliness are essential qualities that must be present as a design makes its way through the myriad processes that make a physical real world product.

These are the reasons why our designs are enduring. From a passion to remain true to the essence of music, and by keeping all the key design elements in harmony, we create products of true quality.

Several years in the making, the latest generation of Trilogy Audio Systems components remain true to our original core values. Engineered from the inside out with real heart and soul behind them, they will provide lasting satisfaction, making music for your pleasure. We hope you will share the experience with us soon.

"I firmly believe that making exceptional products is a combination of knowledge and intuition, or passion if you prefer. My passion lay firmly with analogue electronics. I also have little or no interest in digital circuits. I understand what’s going on with them but have no feeling about them." - Nic Poulson

Nic Poulson, Trilogy Audio Systems Designer

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Trilogy 931i Headphone Amplifier

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