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View Full Version : SJS Arcadia Model 5 Stereo SE 300B Power Amplifier



sjs
05-08-2016, 15:42
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&p=667637#post667637), SJS Electroacoustics are pleased to present the matching all new bespoke Arcadia Model 5 stereo singled ended 300B power amplifier.

https://dl.dropboxusercontent.com/u/30444544/SJS/300B-stereo-2-5.jpg

In common with other SJS Arcadia amplifiers it has been specifically engineered for sonic performance rather than technical specification, and fulfills SJS Electroacoustics primary design criteria:
Single Ended circuit topology


Pure Class A operation
Zero negative feedback
Valve rectification and choke smoothed HT power supply
Custom made HT T-network power supply capacitors with silver leads
Separate mains transformers for HT and filament supplies
Point-to-point circuit wiring without PCBs
Hand built
Real solid wooden frame
4mm aluminium panels, black or natural anodized
Soundcare SuperSpiked feet


The Arcadia Model 5 power amplifier is a modern implementation of the classic 6SN7-6SN7-300B topology with a few tweaks, mainly in the psu design, component selection and layout.

https://dl.dropboxusercontent.com/u/30444544/SJS/300B-stereo-7.jpg

The standard version is supplied with large wide bandwidth multi-section IE core output transformers, carbon film resistors and high quality film and copper foil coupling capacitors.

It is possible to upgrade this is stages to the Premier version including:

tantalum film resistors
Black Gate bypass capacitors
Dueland CAST DC coupling capacitors
Custom HiB double C-core output transformers
Pure silver wire for all point to point connections


Inside an Enhanced version:
https://dl.dropboxusercontent.com/u/30444544/SJS/300B-stereo-9.jpg

Inside a Premier version
https://dl.dropboxusercontent.com/u/30444544/SJS/300B-stereo-2-1.jpg

Design Options
The Model 5 SE 300B power amplifier is hand built to order in England, and therefore we are able to offer customisation to meet your aesthetic and sonic preferences. The solid wooden chassis is available in a range of four standard choices; cherry, maple, light oak and walnut with others such as zebra wood available to special order. The chassis panels are available in either natural or black anodised aluminium as standard, with other colours, such as blue, red or gold, available to special order.

Bespoke customisation of the internal components is also possible to meet our clients' specific requirements, whether it be for use of a certain interconnect cable between the phono sockets and the circuit, or replacement of the coupling capacitors, power supply capacitors or resistors, for example, these can be discussed at the point of ordering.

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
20-04-2017, 14:04
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

sjs
15-09-2017, 20:05
Now that Dropbox have dropped the public folder, its time to restart the thread with pictures :)

Following on from the successful launch of the Model 3 MM RIAA phono amplifier (http://www.pinkfishmedia.net/forum/showpost.php?p=2647256&postcount=1), SJS Electroacoustics are pleased to present the matching all new bespoke Arcadia Model 5 stereo singled ended 300B power amplifier.

https://dl.dropboxusercontent.com/s/3jdhjtbj6lmuo12/300B-stereo-2-5.jpg

In common with other SJS Arcadia amplifiers it has been specifically engineered for sonic performance rather than technical specification, and fulfills SJS Electroacoustics primary design criteria:


Single Ended circuit topology
Pure Class A operation
Zero negative feedback
Valve rectification and choke smoothed HT power supply
Custom made HT T-network power supply capacitors with silver leads
Separate mains transformers for HT and filament supplies
Point-to-point circuit wiring without PCBs
Hand built
Real solid wooden frame
4mm aluminium panels, black or natural anodized
Soundcare SuperSpiked feet


The Arcadia Model 5 power amplifier is a modern implementation of the classic 6SN7-6SN7-300B topology with a few tweaks, mainly in the psu design, component selection and layout.

https://dl.dropboxusercontent.com/s/zd2812yzdm8jdjy/300B-stereo-7.jpg

The standard version is supplied with large wide bandwidth multi-section IE core output transformers, carbon film resistors and high quality film and copper foil coupling capacitors.

It is possible to upgrade this is stages to the Premier version including:


tantalum film resistors
Black Gate bypass capacitors
Dueland CAST DC coupling capacitors
Custom HiB double C-core output transformers
Pure silver wire for all point to point connections


Inside an Enhanced version:
https://dl.dropboxusercontent.com/s/iwk4o67wx6xbtbs/300B-stereo-9.jpg

Inside a Premier version

https://dl.dropboxusercontent.com/s/7sxmpwsxyr08j9e/300B-stereo-2-1.jpg

Design Options
The Model 5 SE 300B power amplifier is hand built to order in England, and therefore we are able to offer customisation to meet your aesthetic and sonic preferences. The solid wooden chassis is available in a range of four standard choices; cherry, maple, light oak and walnut with others such as zebra wood available to special order. The chassis panels are available in either natural or black anodised aluminium as standard, with other colours, such as blue, red or gold, available to special order.

Bespoke customisation of the internal components is also possible to meet our clients' specific requirements, whether it be for use of a certain interconnect cable between the phono sockets and the circuit, or replacement of the coupling capacitors, power supply capacitors or resistors, for example, these can be discussed at the point of ordering.

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

sjs
28-01-2018, 19:57
A nice Model 5 power amp with maple frame, black anodized aluminium panels, and metallic grey transformer covers

https://dl.dropboxusercontent.com/s/c1yadlzk1o6suhd/300B-stereo-maple%20%28Custom%29.jpg

sjs
16-01-2021, 22:02
a special version of the Model 5 Enhanced complete with Duelund CAST silver foil coupling capacitors and Audio Note AN-V silver cable on the input.

Maple chassis, with black anodised aluminium panels, and metallic gunmetal transformer covers

https://dl.dropboxusercontent.com/s/s3uhhdb0ha59b1a/SJS_Model_5s_3.jpg

https://dl.dropboxusercontent.com/s/p8rhkrsbb1frp0n/SJS_Model_5s_2.jpg

https://dl.dropboxusercontent.com/s/h738m8kifxdqgmj/SJS_Model_5s_1.jpg

Following easing of locdown restrictions this amp will be on demonstration at Definitive Audio (https://www.definitiveaudio.co.uk/) in Nottingham