Audion DUO 300B & 2A3

Silver Night DUO, switchable 300B and 2A3 stereo and Integrated stereo.

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Audion Silver Night DUO switchable 300B/2A3 power amplifier.

Audion Silver Night Anniversary DUO 300B/2A3 switchable hard wired stereo or stereo integrated power amplifier is from our intermediate level range which uses the well known 300B tubes or  switchable to 2A3. These amplifiers are hand built and point to point hard wired (Air Wired©).

This Silver Night Anniversary DUO is different from other amplifiers as the user can switch between any 300B or any type 2A3 valve, obviously more careful choice of speaker is needed. Loudspeakers of 89db or better efficiency for 300B mode 95 db or better for the 2A3. Both stereo and stereo integrateds deliver 7 watts into 8 ohms from a 300B and 3.5 watts from a  2A3. Switching is simply done at the rear by swapping fuse positions and the heater voltages are self sensing within the amp. Valve/Tube rolling is easy as the amp is auto biased.

Upgrade options are available for this model, see upgrade options in tabs below.

The Silver Night DUO 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 JJ 300B, also Electro Harmonix 2A3 Russian New old stock 6H23N as a driver and input tubes. 

Silver Night Anniversary DUO 300/2A3 stereo

Audion Silver Night DUO 300B / 2A3 Anniversary Stereo

The Silver Night DUO  stereo and stereo Integrated amplifiers form part of the best known of the Audion products, and the ones that have won us most awards over the years.

The Audion Silver Night DUO is hand built and point to point hard wired (Air Wired©), using European and US parts. This triode based stereo amp uses no (zero) feedback in the design.

The Silver Night DUO delivers 8 or 4 watts per channel into 8 ohms and is best suited for use with loudspeakers of 989db or 95db or better efficiency depending on the valves that you are using at the time.

The DUO is a therefore a great amp to use with Horn loudspeakers as it has 2 additional power supply stages and very quiet at less than 1mV noise.

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 Silver Night models are auto-biased so do not need regular bias changing or complicated setting up. 

Sonically, The Triode valves used in the DUO have subtleties and finesse and have a fantastic weight, clarity and timbre. 

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 both Stereo and Integrated stereo amplifiers.

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

Specifications Silver Night DUO Stereo & Stereo Integrated power amplifiers.

2 x 7 or 2 x 3.5 Watts Class A  into 8 Ohms at 240V AC
Load: 4 – 8 Ohm Nominal (4 ohm internally modifiable)
Distortion @ 1Watt:   <0.1% No Feedback
Frequency Response: 8Hz to 26KHz ±3 db (or 8 – 45Khz 2A3
Sensitivity: Variable >150mV Full output
Noise: < (CCIR) – 90 db
Consumption: 150/135 Watts per
Tubes: 2 x 300B/2 x 2A3, 2 x 6H23N
Size:  42cm deep,23cm wide and 19cm tall – Less tubes 
Weight: 15Kgs stereo, 16Kgs Integrated 
Fuses – Power 2A 240V / 3.5A 120V slow blow.
            HT. 500mA 240V / 1A 120V Slow blow

Product options for Stereo and Stereo Integrated power amplifiers, as well as valve options.

1. Silver Night 30th Anniversary hard wired 300B, PX25 or 2A3 stereo or integrated stereo power amplifier.
2. Signal capacitors, silver wiring, stepped attenuators, power supply components etc etc.
3. WBT NextGen 0210 gold RCA’s and/or WBT 0708 Copper NextGen binding posts. (WBT binding posts fitted as standard to Special Edition models)  

We also offer a remote volume control for all stereo and stereo integrated power amplifiers. New for 2020, full remote control option with built in 63 way stepped attenuator, remote channel change and volume as well as power off. Full metal handset.

Upgrade options and upgraded product categories direct from the factory.

We offer 3 upgrade classes for the Silver Night range of stereo and stereo integrated DUO power amplifiers which consist of :- 
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. 
Signature Reference uses the same as the Excelsior class but comes with fully silver wired audio and ground paths, silver foil in oil capacitors, solid silver wound output transformers, silver RCA’s and Binding posts, 

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

Product reviews from around the World. 

these need to be added

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.  

 

Technical specifications for both Stereo and Integrated stereo amplifiers.

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

Specifications Silver Night DUO Stereo & Stereo Integrated power amplifiers.

2 x 7 or 2 x 3.5 Watts Class A  into 8 Ohms at 240V AC
Load: 4 – 8 Ohm Nominal (4 ohm internally modifiable)
Distortion @ 1Watt:   <0.1% No Feedback
Frequency Response: 8Hz to 26KHz ±3 db (or 8 – 45Khz 2A3
Sensitivity: Variable >150mV Full output
Noise: < (CCIR) – 90 db
Consumption: 150/135 Watts per
Tubes: 2 x 300B/2 x 2A3, 2 x 6H23N
Size:  42cm deep,23cm wide and 19cm tall – Less tubes 
Weight: 15Kgs stereo, 16Kgs Integrated 
Fuses – Power 2A 240V / 3.5A 120V slow blow.
            HT. 500mA 240V / 1A 120V Slow blow

Product options for Stereo and Stereo Integrated power amplifiers, as well as valve options.

1. Silver Night 30th Anniversary hard wired 300B, PX25 or 2A3 stereo or integrated stereo power amplifier.
2. Signal capacitors, silver wiring, stepped attenuators, power supply components etc etc.
3. WBT NextGen 0210 gold RCA’s and/or WBT 0708 Copper NextGen binding posts. (WBT binding posts fitted as standard to Special Edition models)  

We also offer a remote volume control for all stereo and stereo integrated power amplifiers. New for 2020, full remote control option with built in 63 way stepped attenuator, remote channel change and volume as well as power off. Full metal handset.

Upgrade options and upgraded product categories direct from the factory.

We offer 3 upgrade classes for the Silver Night range of stereo and stereo integrated DUO power amplifiers which consist of :- 
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. 
Signature Reference uses the same as the Excelsior class but comes with fully silver wired audio and ground paths, silver foil in oil capacitors, solid silver wound output transformers, silver RCA’s and Binding posts, 

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

Product reviews from around the World. 

these need to be added.

Dick Olsher
Dick Olsher
The Absolute Sound
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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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