Audion HP1 Headphone Amplifier

Silver Night Stereo HP1 Integrated Single Ended/Balanced Headphone Amplifier

New Product
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Audion Silver Night HP1 Headphone Amplifier

The Audion Silver Night HP1 headphone amplifier is a unique product from us fitting into the high end realms of headphone amplification. 

Designed around our award winning Silver Night the HP1 features many of the same attributes as its namesake, hard wiring our own in-house would transformers and our single ended circuitry. Adding to this though the HP1 has been designed around our new output transformer, so can drive any headphone from its range of 5 switchable output impedances. On the front we have both balanced and single ended headphone outputs via either a Neutrik 6.3mm or 4 pin Neutrik XLR headphone sockets. Add to this 3 switchable stereo input channels and optional balanced XLR Inputs and outputs,  and you have a robust full media centre.

The new Silver Night HP1 300B headphone integrated (balanced) amplifier can run just about any headphone with its switchable output transformers that can drive them to potentials that you never thought previously they could achieve.

Where possible we avoid the use of Chinese components. These Triode based amplifiers use unique circuits and of course our own output transformers. See the tabs below for list of amplifiers and options to suit your needs

Audion Silver Night Special Edition 300B Integrated Stereo

The Audion Silver Night HP1 hard wired 300B headphone amplifier is a unique product from us and features 8, 32, 150, 300 and 600 ohm switchable transformer output in either balanced or single ended mode. With 3 stereo input channels and a straight through un-attenuated output for direct connection to a power amplifier or similar.

All of our single ended designs use unique circuits and are auto-biased so don’t need regular bias changing or complicated setting up. The HP1 in fact uses a very similar circuit to our already renowned award winning Silver Night. 

Sonically, The Triode valves used in the Silver Nights give subtle nuances and texture to the music allowing un-paralleled music finition retrieval. The 300B is a very well know valve that can reproduce delicacies and yet be punchy at the same time.

The Silver Night HP1 300B headphone amplifier is a truly capable product featuring many additions that we have been asked for in a headphone amp, (integrated pre-amplifier, balanced headphone sockets, plenty of power to drive difficult headphones and many output impedance options). The HP1 is designed for ease of use, quality of sound and versatility – “We know you will like it” 

The chassis is made of military grade aluminium, with a durable black powder coated finish. The top plate and badge are finished with mirror polished stainless steel.  

Technical specifications for Silver Night HP1 hard wired 300B headphone amplifier.

Warranty: 2 years return to base. Valves 6 months.

Specifications

Power : 2 x 4 Watts Class A into 8 Ohms @240V AC
Power supply featuring choke loading and active supplies.
Load: 8 – 600 Ohms in 5 steps (8, 32, 150, 300 and 600 ohms)
Sensitivity Variable – >150mV Full output
Impedance – 47K Single Ended / 600R Balanced  (Optional)
Phase – Correct
Distortion @ 1 Watt – <0.010% No Feedback
Noise CCIR) – <85db 
Frequency Response: – 11 – 165KHz ±1 db RIAA
Signal to Noise: – >70 db
Weight: – 14kg  
Inputs – 3 Stereo Line Level  1 pair 3 pin XLR (optional)
Outputs – Front – Neutrik 6.3mm and 4 pin XLR,
Rear 1 Unattenuated tape out, 1 Pair 3 pin XLR (optional).
Consumption: 165 Watts 
Tubes: 2 x JJ300B’s & 2 x 6h23n
Size:  42cm deep,23cm wide and 19cm tall – Excluding valves. 
Fuses – Power 2A / 250V Slow blow & H.T. 500mA 250V Slow blow
US/Jpn Power 3.15A / 120V Slow blow and 1A / 120V Slow blow.

Product options for the Silver Night HP1 include the optional XLR balanced input output option on the rear 

Product options for HP1 headphone amplifier  are limited a little by the amount of space available within the  chassis, however we are still able to fit a remote control volume or a 48 way stepped attenuator, better signal capacitors, as well as better power supply capacitors and even more silver wire for the full audio path and now we can offer WBT Nextgen RCA terminals, as well as  various valve options.

Upgrade options and upgraded product categories direct from the factory.

We offer 2 upgrade classes for the Silver Night HP1 stereo headphone amplifier.. The upgrade classes are 
Insignia Class which uses a full silver wired audio path (less internal interconnect), better graded components again in the audio path, tantalum resistors in the critical places and WBT RCA’s.
Excelsior Class uses the same as above but with the inclusion of Teflon/Tin foil V-caps, Internal Solid Silver wired Interconnect, a 43 way Stepped attenuator, better power supply capacitors, more tantalum resistors and WBT RCA’s. 

There are options on both classes for solid silver wound secondaries or primaries and secondaries on the output transformer.

The Audion Silver Night HP1 hard wired 300B headphone amplifier is a unique product from us and features 8,32,150, 300 and 600 ohm switchable transformer output in either balanced or single ended mode. With 3 stereo input channels and a straight through un-attenuated output for direct connection to a power amplifier or similar.

All of our single ended designs use unique circuits and are auto-biased so don’t need regular bias changing or complicated setting up. The HP1 in fact uses a very similar circuit to our already renowned award winning Silver Night. 

Sonically, The Triode valves used in the Silver Nights give subtle nuances and texture to the music allowing un-paralleled music finition retrieval. The 300B is a very well know valve that can reproduce delicacies and yet be punchy at the same time.

The Silver Night HP1 300B headphone amplifier is a truly capable product featuring many additions that we have been asked for in a headphone amp, (integrated pre-amplifier, balanced headphone sockets, plenty of power to drive difficult headphones and many output impedance options). The HP1 is designed for ease of use, quality of sound and versatility – “We know you will like it” 

The chassis is made of military grade aluminium, with a durable black powder coated finish. The top plate and badge are finished with mirror polished stainless steel.  

Technical specifications for Silver Night HP1 hard wired 300B headphone amplifier.

Warranty: 2 years return to base. Valves 6 months.

Specifications

Power : 2 x 4 Watts Class A into 8 Ohms @240V AC
Power supply featuring choke loading and active supplies.
Load: 8 – 600 Ohms in 5 steps (8, 32, 150, 300 and 600 ohms)
Sensitivity Variable – >150mV Full output
Impedance – 47K Single Ended / 600R Balanced  (Optional)
Phase – Correct
Distortion @ 1 Watt – <0.010% No Feedback
Noise CCIR) – <85db 
Frequency Response: – 11 – 165KHz ±1 db RIAA
Signal to Noise: – >70 db
Weight: – 14kg  
Inputs – 3 Stereo Line Level  1 pair 3 pin XLR (optional)
Outputs – Front – Neutrik 6.3mm and 4 pin XLR,
Rear 1 Unattenuated tape out, 1 Pair 3 pin XLR (optional).
Consumption: 165 Watts 
Tubes: 2 x JJ300B’s & 2 x 6h23n
Size:  42cm deep,23cm wide and 19cm tall – Excluding valves. 
Fuses – Power 2A / 250V Slow blow & H.T. 500mA 250V Slow blow
US/Jpn Power 3.15A / 120V Slow blow and 1A / 120V Slow blow.

Product options for the Silver Night HP1 include the optional XLR balanced input output option on the rear 

Product options for HP1 headphone amplifier  are limited a little by the amount of space available within the  chassis, however we are still able to fit a remote control volume or a 48 way stepped attenuator, better signal capacitors, as well as better power supply capacitors and even more silver wire for the full audio path and now we can offer WBT Nextgen RCA terminals, as well as  various valve options.

Upgrade options and upgraded product categories direct from the factory.

We offer 2 upgrade classes for the Silver Night HP1 stereo headphone amplifier.. The upgrade classes are 
Insignia Class which uses a full silver wired audio path (less internal interconnect), better graded components again in the audio path, tantalum resistors in the critical places and WBT RCA’s.
Excelsior Class uses the same as above but with the inclusion of Teflon/Tin foil V-caps, Internal Solid Silver wired Interconnect, a 43 way Stepped attenuator, better power supply capacitors, more tantalum resistors and WBT RCA’s. 

There are options on both classes for solid silver wound secondaries or primaries and secondaries on the output transformer.

Graeme Holland
Graeme Holland
Audion International 2019
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