Integrated Amplifiers
Tone is of paramount importance in music, and Audio Note’s amplifier range covers the entire spectrum, from the modest to the decisively extroverted. It includes technically superior pre-amplifiers, versatile power amplifiers, and celebrated integrated amplifiers like the OTO SE Signature and Meishu Tonmeister. Our ambitious projects, such as ‘The Legend,’ are consistently pushing the boundaries and setting new benchmarks in audio performance.
Our latest integrated amplifier comes with DAC, producing 28 watts per channel from a pair of EL34 valves operating in Class A push-pull.
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Cobra
It is capable of driving a wide variety of 'speakers thanks to its exceptional double C-core output transformers, which are custom designed and manufactured by Audio Note (UK).
Cobra is equipped with three analogue stereo inputs, and an additional three digital inputs, via the onboard DAC. The digital coax inputs can accept signals up to 24-bit/176.4kHz (native bit-depth for the Philips TDA1543 D/A converter chip is 16bit, so anything above this is truncated down). The Optical SPDIF input can accept signals up to 24-bit/96kHz (see above). The USB input can accept up to 16-bit/48kHz.
Remote volume control, mute and input selection.
This integrated amplifier is a Pure Class A, Push Pull valve design provides an outstanding level of performance and value.
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OTO PP
The OTO PP models have been specifically engineered for sonic performance rather than technical specification, and fulfil all Audio Note (UK) Level 1 criteria: -
- Pure Class A Push-Pull Pentode operation
- Materials and component quality
- The output transformers are custom designed and manufactured by Audio Note (UK) and are of extremely high quality, offering outstanding, class leading performance in today’s world of high performance audio.
Current Models
- OTO Line PP
- OTO Phono PP
Available finishes
- Fascia - Anodised Aluminium or Black Acrylic - Custom Finishes on Request
This integrated amplifier is a Pure Class A, Push Pull valve design provides an outstanding level of performance and value.
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SORO PP
The SORO PP models have been specifically engineered for sonic performance rather than technical specification, and fulfil all Audio Note (UK) Level 1 criteria: -
- Pure Class A Push-Pull Pentode operation
- Materials and component quality
- The output transformers are custom designed and manufactured by Audio Note (UK) and are of extremely high quality, offering outstanding, class leading performance in today’s world of high performance audio.
Current Models
- SORO Line PP
- SORO Phono PP
Materials and component quality
- A high gain power amplifier stage is used consisting of an ECC82 dual triode acting as an anode follower for the first stage, the output of which is applied to a second anode follower (ECC82) which feeds the parallel connected 6L6G output valves. This arrangement allows for a passive line stage / volume control circuit to be incorporated into the design.
- The output transformers are custom designed and manufactured by Audio Note (UK), and are of the highest possible quality.
- The power supply is a multi element design, ensuring precise operation of each circuit stage, whilst a DC supply feeds the low level valve filaments.
Available finishes
- Fascia - Anodised Aluminium or Black Acrylic - Custom Finishes on Request
This integrated amplifier is a Pure Class A, Single Ended valve design, offers an outstanding level of performance.
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OTO SE
The OTO SE models fulfil all Audio Note (UK) Level 2 criteria: -
- Pure Class A Single Ended Pentode operation
- Materials and component quality
Current models
- OTO Line SE
- OTO Line SE Signature
- OTO Line SE Silver Signature
- OTO Phono SE
- OTO Phono SE Signature
- OTO Phono SE Silver Signature
Materials and component quality
Some of the superior quality components utilised in the OTO SE include: -
- Audio Note (UK) foil capacitors, used in the most critical areas.
- Dual power supplies and transformers, one for the output stage and one for the remaining circuitry.
- Custom designed output transformers, manufactured by Audio Note (UK). These output transformers – one of the most critical areas of valve amplifier design – allow the OTO SE to produce impressively extended and controlled bass.
Some of the superior quality components utilised in the OTO SE Signature include: -
- Audio Note (UK) Copper foil capacitors used in the most critical areas.
- Audio Note (UK) Tantalum resistors used in the most critical areas.
- Custom designed IHiB output transformers, manufactured by Audio Note (UK). These output transformers - one of the most critical areas of valve amplifier design allow the OTO SE Signature to produce impressively extended and controlled bass.
Some of the superior quality components used in the OTO SE Silver Signature include: -
- Audio Note (UK) Copper foil capacitors used in the most critical areas.
- Audio Note (UK) 1 Watt Ni-Chrome resistors used in the most critical areas.Audio Note (UK) KAISEI NP and KAISEI standard electrolytic capacitors.
- SHiB copper / copper c-core output transformers, custom designed and manufactured in-house by Audio Note (UK). These output transformers – one of the most critical areas of valve amplifier design allow the OTO SE Silver Signature to produce impressively extended and controlled bass.
Available finishes
- Fascia - Anodised Aluminium or Black Acrylic
This integrated amplifier is a Pure Class A, Single Ended valve design, offers an outstanding level of performance.
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SORO SE
The SORO SE models have been specifically engineered for sonic performance rather than technical specification, and fulfil all Audio Note (UK) Level 2 criteria: -
- Pure Class A Push-Pull Pentode operation
- Materials and component quality
Current Models
- SORO Line SE Signature
- SORO Phono SE
- SORO Phono SE Signature
Materials and component quality SORO SE
- Audio Note (UK) foil capacitors, used in the most critical areas.
- Dual power supplies and transformers, one for the output stage and one for the remaining circuitry.
- Custom designed output transformers, manufactured by Audio Note (UK). These output transformers – one of the most critical areas of valve amplifier design – allow the SORO SE to produce impressively extended and controlled bass.
Materials and component quality SORO SE Signature
- Audio Note (UK) Copper foil capacitors used in the most critical areas.
- Audio Note (UK) Tantalum resistors used in the most critical areas.
- Custom designed IHiB output transformers, manufactured by Audio Note (UK). These output transformers – one of the most critical areas of valve amplifier design – allow the SORO Phono SE Signature to produce impressively extended and controlled bass.
Available finishes
- Fascia - Anodised Aluminium or Black Acrylic
What we have gleaned from developing our Ongaku type amplifiers has been implemented using the esteemed 300B valve.
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Meishu Tonmeister
If the lenses in a microscope are not correctly chosen and adjusted, the image becomes blurred, and detail and information is lost. The same is true for an amplifier circuit; if each stage is not absolutely correctly chosen and matched to work optimally with the rest of the amplifier, the result will be blurred, unfocused, uneven sound lacking in information.
So to create a better amplifier, the natural idea was to simplify the circuit and optimise every element, so the combination works seamlessly and harmoniously together. This is exactly what we have done with the MEISHU Tonmeister.
The new PSU uses only one mains transformer, one 5U4 rectifier valve and one choke. When this arrangement is optimised, it works extremely well, producing a very homogeneous and ‘complete’ sound.
The input and driver stage is very similar to that found in the JINRO, TOMEI and ONGAKU, with a 12AU7 and 5687 driving an in-house designed and manufactured inter-stage transformer for the best energy transfer, evenness and authority. This is the most important, fundamental upgrade over the original design.
The output transformers for the new MEISHU were designed specifically for the project by Andy Grove, and it is not an overstatement to say that they are superb.
The circuit is now a beautiful example of elegant simplification, something that could only be realised thanks to our ability to create extremely closely matched transformers in-house, and having our own supply of custom resistors, in-house made foil capacitors and custom made electrolytic capacitors. These allow us to exert extremely tight control over the performance and voicing of the complete amplifier from input to output, something that is simply beyond the possibilities of manufacturers who have to rely on 'off the shelf' components.
The result is an amplifier that maintains the legendary Audio Note musicality, midrange magic and glorious tonal colour of the original MEISHU, whilst bringing new and previously unheard levels of information retrieval and dynamic expression, redefining what is usually expected of a 300B SET amplifier.
Phono Models come with a build in ultra quality tube MM phono-stage with a dedicated power supply, so it is certainly not an afterthought!
It has been specifically engineered for sonic performance rather than technical specification, and fulfills all Audio Note (UK) Level 3 criteria: -
- Pure Class A operation
- Zero Negative Feedback
- Single Ended Output Stage Valve Rectification
- Directly Heated Triode operation Materials and component quality
Current models
- Meishu Line Tonmeister
- Meishu Line Silver Tonmeister
- Meishu Line Silver Signature Tonmeister
- Meishu Phono Tonmeister
- Meishu Phono Silver Tonmeister
- Meishu Phono Silver Signature Tonmeister
Materials and component quality Meishu
- In house designed and manufactured I-E M4 copper / copper interstage and output transformers
IE copper / copper PSU Choke and mains transformers
Copper internal wiring - Audio Note (UK) AN-C copper interconnect cable used for signal wiring Audio Note (UK) Copper signal capacitors
Audio Note (UK) STD Electrolytic Capacitors everywhere
Audio Note (UK) 0.5W and 1W Magnetic Tantalum Resistors - Audio Note (UK) custom potentiometer volume control
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Materials and component quality Meishu Silver
- In house designed and manufactured Audio Note (UK) IHiB copper / copper interstage and output transformers
IE copper / copper PSU Choke and mains transformers
Copper internal wiring - Audio Note (UK) AN-V silver interconnect cable used for signal wiring
Audio Note (UK) Copper signal capacitors
Audio Note (UK) STD and KAISEI Electrolytic Capacitors
Audio Note (UK) 1W Non-Magnetic Ni-Chrome Resistors and Carbon Resistors Audio Note (UK) custom potentiometer volume control - Download Detailed Info
Materials and component quality Meishu Silver Signature
- In house designed and manufactured Audio Note (UK) SHiB copper / copper interstage and output transformers
Audio Note (UK) IHiB copper / copper PSU Choke and mains transformers
Copper internal wiring - Audio Note (UK) AN-Vx silver interconnect cable used for signal wiring
Audio Note (UK) Copper signal capacitors
Audio Note (UK) STD and KAISEI Bi-Polar Electrolytic Capacitors
Audio Note (UK) 2W Non-Magnetic Ni-Chrome Resistors and Carbon Resistors Audio Note (UK) 36 Step Mono Resistor Volume Attenuators - Download Detailed Info
Available finishes
- Fascia - Anodised Aluminium or Black Acrylic
The Jinro uses the same circuit at the legendary Ongaku, however with copper primary and secondary transformer windings.
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Jinro
It uses the same circuit design and topology as the legendary Audio Note (UK) ONGAKU amplifier. However, where the ONGAKU uses silver wherever possible, such as for all transformer windings, the JINRO instead uses copper.
It has been specifically engineered for sonic performance rather than technical specification, and fulfils all Audio Note (UK) Level 3 criteria: -
- Pure Class A operation
- Zero Negative Feedback
- Single Ended Output Stage
- Valve Rectification
- Directly Heated Triode operation
- Materials and component quality
Available finishes
- Top Plate - Anodised Aluminium or Black Anodised Aluminium
The Tomei uses the same circuit as the legendary Ongaku, however with copper primary windings for the transformers.
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Tomei
Sharing the circuit design found in the legendary ONGAKU and JINRO integrated amplifiers, the TOMEI bridges the gap between them. Featuring a combination of both copper and silver for the transformers, its performance is both unique and beguiling.
It has been specifically engineered for sonic performance rather than technical specification, and fulfils all Audio Note (UK) Level 4 criteria: -
- Pure Class A operation
- Zero Negative Feedback
- Single Ended Output Stage
- Valve Rectification
- Directly Heated Triode operation
- Materials and component quality
Materials and component quality
Level 4 components are used throughout, including Audio Note (UK)™ Tantalum resistors and Foil Capacitors and in-house designed and manufactured copper/silver wired output transformers.
Available finishes
- Top Plate - Anodised Aluminium or Black Anodised Aluminium
The Ongaku has rightly earned a place in history; its name is synonymous with the finest possible audio reproduction.
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Ongaku
It is a Pure Class A Singled Ended valve amplifier that uses the highly regarded 211 / VT-4C triode valve, producing a level of performance that is radically superior to any other current designs.
It has been specifically engineered for sonic performance rather than technical specification, and fulfils all Audio Note (UK) Level 5 criteria: -
- Pure Class A operation
- Zero Negative Feedback
- Single Ended Output Stage
- Valve Rectification
- Directly Heated Triode operation
- Materials and component quality
Materials and component quality
Only the finest possible components have been employed: -
- Audio Note (UK) silver wire has been used exclusively for all internal wiring, including all transformers and power supply connections.
- Audio Note 2 watt Tantalum resistors have been used throughout.
- All capacitors are either Black Gate Electrolytic or Audio Note (UK) silver foil.
- All transformers are our own in-house custom designed and manufactured devices; driver and output transformers are fully silver wired AN-Perma 50 nickel C-core and the mains transformer is a fully silver wired HiB double C core.
No integrated amplifier has ever produced the levels of musical purity delivered by the ONGAKU… It is without doubt the finest possible integrated amplifier available today.
As you might expect, Audio Note UK products come at a premium.
However, they offer the highest price-to-performance ratio in the market, making our entry-level systems accessible to a broad range of customers.
Your journey starts by contacting our consultants.
Let us guide you to no only meet, but exceed your expectations.
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