Audion 845 Power Amplifier

Black Shadow 845 Single ended Mono-block Hard wired

5 Star Awarded
5/5

Black Shadow 2 

old website

Following much demand from our customers Audion  re-launched the legendary Black Shadow 845 mono-block power amplifier in 2015. The new Black Shadow has been upgraded with an extra buffer stage, improved mains and output transformers, slow start HT to protect the valve life and better components – couple that to a large polypropylene capacitor power supply and large bypass and decoupling capacitors you are guaranteed fast and fluid transient response.. This amplifier is hand built and hard wired using solid silver 5 *9’s in most of the audio path (except the output transformers, input rca’s, speaker binding posts and tube bases). Wherever possible the components are sourced from Europe and the USA and avoiding inferior Chinese components. This triode based mono-block amp uses no (zero) feedback in the design.

Amplifier matching

The Black Shadow  845 SE amplifier comes with Shuguang 845’s as standard but can also be supplied with a choice of 845 tubes upon request. This amp will work with most speakers over of 83 – 4db efficiency. Ideally matched with our range of Electron cables. The amps deliver 25 watts into 8 ohms This has both 4 and 8 ohm outputs.. Upgrade options are available for this model, see upgrade options at end. To provide the fastest transient response possible, solid-state rectification is used, and the design and its implementation ensures phase coherent harmonic structure throughout the frequency spectrum. The 845 output tubes used are well within their specified performance envelope to ensure low distortion and optimum sound quality, as well as extended tube life. .

Quality both inside and out

Having a volume control on the front of both mono-blocks and mono inputs on the rear means that a pre-amplifier is not necessary with this unit, but is advised . These amps are all auto biased. It will take almost any 845 tube(Unit is supplied with Shuguang 845’s .The Black Shadow single ended amplifier 845 Class A power amplifier has 4 & 8 ohm outputs and mono inputs.

The Black Shadow single ended amplifier 845 is hard wired (Air Wired©) Class A mono-block power amplifier. It is built with components sourced from Europe and the US. Where possible we avoid the use of any Chinese component. Our output transformers are wound in-house to our exacting standards and many of the components are either made by us or specifically for us. We use Shuguang 845’s and NOS E182CC & NOS Russian 6H23N.  This amp is designed for difficult loads, loads of power and yet very musical.

black brochure

The re-designed Black Shadow 2 mono-blocks feature the mighty Single ended 845 output valve with no (Zero) negative feedback.

This massive directly heated 845 triode produces 25 substantial watts which are suitable to drive the large majority of loudspeakers with incredible grip, agility, dynamics and realism. There’s a wonderful sense of effortlessness to the sound and few amplifiers can match the low frequency tonality and flow.

The all new MK2 version incorporates not only silver wiring to the signal path, our large custom wound output transformers and choke power supply, but also has new driver circuitry and now comes in our 3 upgrade levels, Insignia, Excelsior and Signature Reference. Our all new internal chassis layout improves build and component layout and relationship.

Internal magnetic shielding around the transformers reduces an already quiet amplifier to an even  lower level of noise. This means a blacker soundstage allowing you to hear even deeper into the music and the delicate low levels details that were previously masked, now come forward.

Our best continues to get better. To provide the fastest transient response possible, solid-state rectification is used and the design, and its implementation ensures phase coherent harmonic structure throughout the frequency spectrum.

“the Audion Black Shadow 2’s show just how seductive they can be. This is a beguiling amplifier, with the sort of effortless sound that wins people over.” Nicholas Ripley. Hifi+ December 2015.

2nd bit from brochure

The new Black Shadow has been upgraded with  an extra buffer stage, improved mains and output transformers, slow start HT to protect the valve life and better components – couple that to a large polypropylene capacitor power supply and also large bypass and decoupling capacitors, as well as further layout improvments and you are guaranteed fast and fluid transient response. This amplifier is meticulously hand built and hard wired point to point by our artisans.

Many of our high end products are offered with bespoke options, in fact many of our customers who order these products have a good idea what they want in these amplifiers and how they should sound.

Depending on your musical taste, we can pretty well tailor the high en amplifier to suit your requirements.

We offer our stock level 3 upgrade options on all of our amplifiers, that being Insignia, Excelsior and Signature Reference classes. This is a great starting point and one that many people opt for as it is an “of the shelf” package. Often however when tailoring your amp for your musical tastes you may wish to change the stock upgrade component for something that you know works for your ears.

“We can do this, just ask (info@audion.co.uk)alternatively as well with our high end products you may wish to customise the look more to your specification. We have the ability to gold and silver plate, powder coat and produce via cnc machinery a variety of looks and finishes. These options do take time however, are an additional cost and only available on our high end range from Insignia and upwards.” We do feel that the upgrade options add considerably to your sound investment.”

Silver Night 300B special Edition integrated stereo

Audion Silver Night Special Edition 300B Integrated Stereo

The Audion Silver Night amplifiers come with a wide range of options, starting with our Mk1 printed circuit board 300B stereo amplifier right up to our Special Edition 300B Mono-block Power amplifiers and now including our all new HPS Silver Night 300B headphone amplifier The Silver Night range represents our intermediate level models.

The range consists of 21 different variations of the Silver Night including our HP1 balanced / SE headphone amplifier and our unique Silver Night DUO that can use both 300B and 2A3 valves using a unique circuit topology. 

The hard wired (Air Wired) 30th Anniversary amplifiers are wired point to point. All of of our amplifiers have a volume control on the front which negates the need for a pre-amplifier in most cases. Our stereo integrated power amplifiers even have a 5 stereo channel passive pre-amplifier built in so you can use up to 5 line level inputs. These amps even have an un-attenuated output for feeding directly to a tape recorder or active sub-woofer or even to another amp for bi-amping. All of our single ended designs use unique circuits and are auto-biased so don’t need regular bias changing or complicated setting up. 

Our amps are ideally suited to loudspeakers of 89db or greater efficiency except for our mono-block versions that can cope with lower efficiency. 

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 PX25 although a lesser known valve does (in our opinion) everything the 300B can but with even better bottom end and top kick. 

Our Special Edition Silver Night series all have a solid silver audio path and internal interconnect, as well as our custom ” red power tubes” and feature WBT Nextgen binding posts, as well as our new look chassis. See New products for more details on the Special Edition range.

The Silver Night HP1 300B headphone amplifier is new to the range 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 connection directly to a power amp or similar, The HP1 headphone amp needs to be seen and heard. See New products for more details on the HP1 headphone amplifier   

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.  The special Edition models feature a full depth mirror polished stainless top plate with hidden fixings and organic valve fillets.

Technical specifications for all products in this range.

 

AmplifierSterling MK1 PCB EL34Sterling Anniv. EL34Sterling Anniv. KT88Sterling Anniv. KT120Sterling Anniv. KT150Sterling Anniv. PSE KT88Sterling Anniv. PP KT88
Type Stereo & IntegratedStereo & IntegratedStereo & IntegratedStereo & IntegratedStereo & IntegratedMono-BlockMono-Block
Power 2 x 12 Watts Class A into 8 Ohms2 x 12 Watts Class A into 8 Ohms2 x 18 Watts Class A into 8 Ohms2 x 24 Watts Class A into 8 Ohms2 x 25 Watts Class A into 8 Ohms2 x 30 Watts Class A into 8 Ohms2 x 45 Watts Class A into 8 Ohms
Distortion @ 1 Watt<0.1% No Feedback”    “”    “”    “”    “”    “”    “
SensitivityVariable >200mV Full Output”    “”    “”    “”    “”    “”    “
Consumption130 Watts140 Watts160 Watts175 Watts185 Watts320 Watts320 Watts
Load8 Ohm Nominal”    “”    “”    “”    “4 & 8 Ohm Nominal4 & 8 Ohm Nominal
Frequency Response14Hz  to 34KHz ± 1db12Hz  to >40KHz ± 1db<10Hz  to >40KHz ± 1db<10Hz  to >40KHz ± 1db<10Hz  to >40KHz ± 1db<10Hz  to >40KHz ± 1db<10Hz  to >40KHz ± 1db
Noise< (CCIR) -85db”    “”    “”    “”    “”    “”    “
Valves2 x EL34, 1 x 6H23N, 1 x 56872 x EL34, 2 x 6H23N2 x KT88, 2 x 6H23N2 x KT120, 2 x 6H23N2 x KT150, 2 x 6H23N4 x KT88, 4 x 6H23N4 x KT88, 4 x 6H23N
Size Height, Width, Depth.19cm, 23cm, 42cm, ”    “”    “”    “”    “19cm, 23cm, 42cm,  each Mono19cm, 23cm, 42cm,  each Mono
Weight11Kg14Kg”    “”    “”    “14Kg each Mono14Kg each Mono
Fuses Power 240V 2A 120V 3.5A Slow Blow”    “”    “”    “”    “”    ” each Mono”    ” each Mono
Fuses HT240V 0.5A 120V 1A  Slow Blow”    “”    “”    “”    “”    ” each Mono”    ” each Mono
Input Impedance50K ohms. ”    “”    “”    “”    “”    “”    “
Warranty. 2 Years – Tubes 6 Months”    “”    “”    “”    “”    “”    “

Product options, both type of amplifier, stereo , stereo integrated or mono-block, as well as valve options.

The Range consists of the following
1. Sterling MK1 Printed circuit board EL34 stereo or 5 channel with integrated passive pre-amplifier stereo power amplifier
2. Sterling 30th Anniversary hard wired EL34, KT88, KT120 or KT150 stereo or 5 channel with integrated passive pre-amplifier stereo power amplifier.
3. Sterling 30th Anniversary hard wired KT88 parallel single ended or push-pull mono block power amplifier. 

We also offer a remote volume control for all stereo and stereo integrated power amplifiers.

Upgrade options and upgraded product categories direct from the factory.

We offer 2 upgrade classes for the Sterling Range.. The upgrade classes are 
Insignia Class which uses a full silver wired audio path, better graded components again in the audio path, tantalum resistors in the critical places and WBT binding posts.
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 and WBT RCA’s. 

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

Audion Sterling amplifiers come with a wide range of options, starting with our Mk1 printed circuit board EL34 stereo amplifier right up to our Anniversary KT88 Mono-block Power amplifiers and represent our entry level models.

The range consists of 12 different variations of the Sterling, with power outputs from 12 – 45 watts and 4 different circuit topologies. 

The hard wired (Air Wired) 30th Anniversary amplifiers are wired point to point. All of of our amplifiers have a volume control on the front which negates the need for a pre-amplifier in most cases. Our stereo integrated power amplifiers even have a 5 stereo channel passive pre-amplifier built in so you can use up to 5 line level inputs. These amps even have an un-attenuated output for feeding directly to a tape recorder or active sub-woofer or even to another amp for bi-amping. All of our single ended designs use a unique ultra-linear circuit and all Sterling power amps use a small amount of negative feedback to make the pentode valves work properly.

All of our Sterling models are auto-biased so do not need regular bias changing or complicated setting up. 

Our amps are ideally suited to loudspeakers of 89db or greater efficiency except for our mono-block versions that can cope with lower efficiency. 

Sonically, The Pentode valves used in the Sterling Range are robust and have a fantastic weight and clarity and the larger KT88, KT120 and KT150 are well suited to more difficult loads. 

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.  The Audion Silver Night amplifiers come with a wide range of options, starting with our Mk1 printed circuit board 300B stereo amplifier right up to our Special Edition 300B Mono-block Power amplifiers and now including our all new HPS Silver Night 300B headphone amplifier The Silver Night range represents our intermediate level models.

The range consists of 21 different variations of the Silver Night including our HP1 balanced / SE headphone amplifier and our unique Silver Night DUO that can use both 300B and 2A3 valves using a unique circuit topology. 

The hard wired (Air Wired) 30th Anniversary amplifiers are wired point to point. All of of our amplifiers have a volume control on the front which negates the need for a pre-amplifier in most cases. Our stereo integrated power amplifiers even have a 5 stereo channel passive pre-amplifier built in so you can use up to 5 line level inputs. These amps even have an un-attenuated output for feeding directly to a tape recorder or active sub-woofer or even to another amp for bi-amping. All of our single ended designs use unique circuits and are auto-biased so don’t need regular bias changing or complicated setting up. 

Our amps are ideally suited to loudspeakers of 89db or greater efficiency except for our mono-block versions that can cope with lower efficiency. 

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 PX25 although a lesser known valve does (in our opinion) everything the 300B can but with even better bottom end and top kick. 

Our Special Edition Silver Night series all have a solid silver audio path and internal interconnect, as well as our custom ” red power tubes” and feature WBT Nextgen binding posts, as well as our new look chassis. See New products for more details on the Special Edition range.

The Silver Night HP1 300B headphone amplifier is new to the range 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 connection directly to a power amp or similar, The HP1 headphone amp needs to be seen and heard. See New products for more details on the HP1 headphone amplifier   

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.  The special Edition models feature a full depth mirror polished stainless top plate with hidden fixings and organic valve fillets.

 

Technical specifications for all products in this range.

Product options, both type of amplifier, stereo , stereo integrated or mono-block, as well as valve options.

The Range consists of the following
1. Sterling MK1 Printed circuit board EL34 stereo or 5 channel with integrated passive pre-amplifier stereo power amplifier
2. Sterling 30th Anniversary hard wired EL34, KT88, KT120 or KT150 stereo or 5 channel with integrated passive pre-amplifier stereo power amplifier.
3. Sterling 30th Anniversary hard wired KT88 parallel single ended or push-pull mono block power amplifier. 

We also offer a remote volume control for all stereo and stereo integrated power amplifiers.

Upgrade options and upgraded product categories direct from the factory.

We offer 2 upgrade classes for the Sterling Range.. The upgrade classes are 
Insignia Class which uses a full silver wired audio path, better graded components again in the audio path, tantalum resistors in the critical places and WBT binding posts.
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 and WBT RCA’s. 

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

Dick Olsher
Dick Olsher
The Absolute Sound
Read More
The Audion Sterling EL34 Anniversary Edition is a warm and dimensional-sounding amplifier with a potent lower midrange that does justice to the power range of an orchestra. It sang right out of the box and never misbehaved. Kudos to the Audion team for breathing new life into the venerable EL34 pentode. In my estimation, the Sterling EL34 represents a gift to music lovers everywhere. Highly recommended.
John Potis
John PotisSoundstage
Read More
"Very round, smooth and toasty," but "well capable of enough resolution to easily distinguish Red Book CDs from their SACD cousins"; the midrange is "smooth and luxurious," but the bass has "neither the detailed control nor the slam of any solid-state integrated in [the Sterling Stereo EL34's] price range" -- no surprise., pulvinar dapibus leo. "Fully capable of refined tube splendor that's unanticipated at its price level."
John Marchant
John MarchantHifi Review.com
Read More
The sound was a contrast, detailed and extremely musical. There was no slowness and desire to lull the listener, for which I dislike for a directly heated triode single end.
John Darko
John Darko@username
Read More
Every Sterling feels like it's punching well above its weight. So Good I bought one myself. More seasoned audiophiles will know that good amplification – no matter the topology – has no sound of its own. Don’t expect the thick syrup or golden hues of sub-$1000 Chinese units. There is no sickly/heavy sauce here. Neither is there porridge bass. Who said tubes are no hopeless below the waist? (Fools!) This Audion is the healthiest of extra virgin olive oil: light, transparent, clean. And fast. It is unburdened by ponderous, labouring low frequencies or musical weight gain. Its talents lie in 1. the ability to drive a wide range of loudspeakers and 2. the beautification of music. Each combination a winner.
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