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View Full Version : SJS Arcadia Model 7 Line Pre-amplifier



sjs
23-03-2017, 14:40
Following on from the successful launch of the Model 3 MM RIAA phono amplifier (http://theartofsound.net/forum/showthread.php?39613-SJS-Arcadia-Model-3-Valve-MM-Phono-Amplifier), and the Model 5 Stereo SE 300B Power Amplifier (http://theartofsound.net/forum/showthread.php?46047-SJS-Arcadia-Model-5-Stereo-SE-300B-Power-Amplifier), SJS Electroacoustics are pleased to present the new Model 7 line stage pre-amplifier.

The Model 7 has been designed as the 20th Anniversary re-imagination of the original Arcadia Model 1 line stage preamplifier, which was first delivered to customers in early 1997.

https://dl.dropboxusercontent.com/u/30444544/SJS/SJS_Model7_line_1.jpg

The Arcadia Model 7 line stage is based upon the same 6111wa NOS military valve and has been specifically engineered for sonic performance rather than technical specification, and fulfils all SJS Electroacoustics primary design criteria:


Single Ended circuit topology
Pure Class A operation
Zero negative feedback
Valve rectification and choke-input HT power supply
Custom made HT T-network power supply capacitors with silver leads
Point-to-point circuit wiring without PCBs
Hand built
PTFE board for component mounting
High quality components throughout
Custom made aluminium chassis


https://dl.dropboxusercontent.com/u/30444544/SJS/SJS_Model7_line_2.jpg

Bespoke customisation of the internal components is possible to meet our clients' specific requirements, whether it is replacement of the Audyn capacitors with Dueland RS or CAST or possibly even using Tantalum film resistors, for example, these can be discussed at the point of ordering.

https://dl.dropboxusercontent.com/u/30444544/SJS/SJS_Model7_line_3.jpg


https://dl.dropboxusercontent.com/u/30444544/SJS/SJS_Model7_line_4.jpg

Each amplifier comes with 2 years parts a labour warranty, except for the valves which have a 6 month warranty.

Further details can be found on the SJS Blog (http://sjselectroacoustics.blogspot.co.uk/)

SJS Arcadia amplifiers are available from Definitive Audio (http://www.definitiveaudio.co.uk/news.html) in Nottingham

Mike Adams
23-03-2017, 19:29
Looks very nice Simon!

julesd68
23-03-2017, 19:54
Maybe I'm missing something but couldn't find any details about SJS on the Definitive Audio website ...

sjs
23-03-2017, 20:12
Maybe I'm missing something but couldn't find any details about SJS on the Definitive Audio website ...
There is a small piece in the news section as they have just taken the amps on (again)...... more to follow :)

Definitive were one of my dealers back in the late 90s so it's good to be working with them again.

At the moment, the most info is on my blog:
Sjselectroacoustics.blogspot.co.uk
Or ping me a message if you want to know anything specific.

sq225917
23-03-2017, 21:40
That looks exquisite. No wonder Definitive have picked you up, Kevin knows quality.

hifinutt
23-03-2017, 21:46
prices would be good too

sjs
23-03-2017, 22:25
prices would be good too

We are running a 20th Anniversary 20% discount for all amplifier orders placed before the end of 2017.

hifinutt
23-03-2017, 22:31
sounds good , 20 % off what though ?

would this performance fall below the 1.5 if it is based on the 1 ?

sjs
23-03-2017, 22:53
sounds good , 20 % off what though ?

Would this performance fall below the 1.5 if it is based on the 1 ?

20% off the inc vat list price of any of the new amps: Model 3 riaa, Model 5 se 300B, Model 6 riaa, Model 7 line, Model 8 se 300B amp, Aoide headphone amp

The Model 1 was the original steel case entry level unit form the late 90s, the Model 2 was available at the same time as a higher spec copper case version of the same design. The Model 1.5 is a name coined to refer to the original Model 1 units which have been back for a significant upgrade to the internal parts to move them towards the performance of the Model 2. A number of these Model 1.5 units have come about over the past few years.

The Model 1, Model 1.5, Model 2 and Model 7 are all the same basic circuit design, using the 6111wa valve. The difference is in the execution, parts, layout and chassis material.

I have a fully modded Model 1.5 here for comparison, and the Model 7 in the photos comfortably outperforms it.

hifinutt
24-03-2017, 18:03
brilliant , thanks for that

Yomanze
24-03-2017, 18:41
Very, very, very tidy.

sjs
20-04-2017, 14:05
To celebrate 20 years since the first sjs arcadia Model 1 preamplifiers were delivered, we are pleased to announce a special 20th anniversary 20% discount on confirmed orders for any new sjs arcadia valve amplifier

https://dl.dropboxusercontent.com/u/30444544/SJS/Arcadia%20-%2020th%20anniversary%2020%25%20offer.jpg

This offer includes all current designs: Model 3 riaa, Model 5 se 300B, Model 6 riaa, Model 7 line, Model 8 se 300B amp, Aoide headphone amp

hifinutt
20-04-2017, 14:24
very nice , are there any demo models floating about ?

sjs
20-04-2017, 14:31
very nice , are there any demo models floating about ?

There are currently demo units available for the Model 3 riaa, Model 5 se 300b and Aoide headphone amp.

There will be demo units for the Model 6 riaa and Model 7 line ready soon, and definitely in time to be seen at the NW Audio Show at Cranage Hall at the end of June.

hifinutt
20-04-2017, 14:37
ah you took the words out of my head simon. was just going to ask if it was at cranage .

hificricketboy
08-09-2017, 12:32
As winter is coming and the listening season is about to start (cricket season has nearly concluded!) I may be in the market for a pre-amp.

I've read loads of glowing reports of Simon's wares, particularly the Model 1, 1.5 and 2, and wondered if anyone had the chance to listen to the Model 7 yet?

Would love to hear of any views...

sjs
08-09-2017, 13:38
There are currently two Model 7 preamps at Definitive Audio in Nottingham, a Standard version and an Enhanced version.

Alternatively you are welcome to come for a demo in Manchester.

sjs
15-09-2017, 17:12
Now that Dropbox have dropped the public folder, it's time to reinstate the photos :)


https://dl.dropboxusercontent.com/s/7m1nnght23boapi/SJS_Model7_line_1.jpg

The Arcadia Model 7 line stage is based upon the same 6111wa NOS military valve and has been specifically engineered for sonic performance rather than technical specification, and fulfils all SJS Electroacoustics primary design criteria:


Single Ended circuit topology
Pure Class A operation
Zero negative feedback
Valve rectification and choke-input HT power supply
Custom made HT T-network power supply capacitors with silver leads
Point-to-point circuit wiring without PCBs
Hand built
PTFE board for component mounting
High quality components throughout
Custom made aluminium chassis


https://dl.dropboxusercontent.com/s/b7cn810e1968fi6/SJS_Model7_line_2.jpg

Bespoke customisation of the internal components is possible to meet our clients' specific requirements, whether it is replacement of the Audyn capacitors with Dueland RS or CAST or possibly even using Tantalum film resistors, for example, these can be discussed at the point of ordering.

https://dl.dropboxusercontent.com/s/ueoo1ncyqsf8x5h/SJS_Model7_line_3.jpg


https://dl.dropboxusercontent.com/s/qafghowhl8y8xsv/SJS_Model7_line_4.jpg

Each amplifier comes with 2 years parts a labour warranty, except for the valves which have a 6 month warranty.

Further details can be found on the SJS Blog (http://sjselectroacoustics.blogspot.co.uk/)

SJS Arcadia amplifiers are available from Definitive Audio (http://www.definitiveaudio.co.uk/news.html) in Nottingham

JohnJo
15-09-2017, 20:16
Very nice Simon!

sjs
28-01-2018, 19:55
Model 7 Enhanced version with:

Dueland RS capacitors
Tantalum film resistors
Silver wire
Khozmo stepped attenuator


https://dl.dropboxusercontent.com/s/3jhpyv2l2bug5cc/Model%207%20enhanced%202.jpg

Yomanze
29-01-2018, 17:15
Absolutely stunning, less is more. Cottage industry is just the best IMHO. Best of luck SJS. [emoji4]

montesquieu
29-01-2018, 21:03
Indeed this is really gorgeous.

I like my EAR 912 but it's very utilitarian in its execution. By comparison this is a work of art.

sjs
08-02-2018, 15:11
Absolutely stunning, less is more. Cottage industry is just the best IMHO. Best of luck SJS. [emoji4]


Indeed this is really gorgeous.

I like my EAR 912 but it's very utilitarian in its execution. By comparison this is a work of art.

Thanks for the comments.

I continue to be inspired by the original Model 1 & Model 2 amps which come back after 20 years in the field for servicing, and aspire to build new amps which will retain their appeal and musicality in a similar way.

sjs
12-10-2020, 12:34
Busy during lockdown and ready to bounce back with the new dark star version of the SJS Arcadia Model 7 linestage preamplifier

https://dl.dropboxusercontent.com/s/evxq1afrqtjzhck/SJS_Model7_line_11.jpg

https://dl.dropboxusercontent.com/s/qhtwyin75lu1v06/SJS_Model7_line_10.jpg

https://dl.dropboxusercontent.com/s/2fe71i4vd5yzos2/SJS_Model7_line_12.jpg

https://dl.dropboxusercontent.com/s/giwlrbj1ncwx6rs/SJS_Model7_line_13.jpg

Standard and Enhanced versions are now on demonstration at Definitive Audio (https://www.definitiveaudio.co.uk/) in Nottingham

sjs
15-03-2021, 21:51
A new SJS Arcadia Model 7 Enhanced valve linestage preamplifier ready for delivery to Definitive Audio (https://www.definitiveaudio.co.uk/product-sjs-electroacoustics.html).

The first amplifier sporting our new super high grade mains transformer with copper plated frames.

https://dl.dropboxusercontent.com/s/kyqp28kxe9gmo9q/SJS_Model7_line_25.jpg

Enhanced version in black with choke loaded triode gain stage, Duelund CAST capacitors and pure silver wiring throughout.

Each one is hand built to order and can arrive with your choice of finish for the front panel and dials.

https://dl.dropboxusercontent.com/s/eebdo09zig8fgv9/SJS_Model7_line_23.jpg


https://dl.dropboxusercontent.com/s/g1z4ue69uogmr7j/SJS_Model7_line_21.jpg


https://dl.dropboxusercontent.com/s/lcimk9b3k6vz0nl/SJS_Model7_line_24.jpg


https://dl.dropboxusercontent.com/s/3pqfbr3mws4wawu/SJS_Model7_line_22.jpg


Which to choose?

flapland
16-03-2021, 11:17
They look great, but I suspect sadly out of my price range new. If anything like your original Ver 1 and 2 they will hold their value really well even second hand in the future.

I recently borrowed a old Ver 1 and 1.5 and hopefully will be owner of one of them in the not too distance future.

sjs
16-03-2021, 20:39
Thanks for the comments Paul.

I fully support the original Model 1 and 2 amps, and the upgraded Model "1.5" amps, for service, repairs and upgrades.