Saturday 22 October 2022

SJS Arcadia Model 5 Premier

Nanocrystalline magnetic cores, such as Hitachi FINEMET, exhibit very high permeability, low power loss, high saturation, very low hysteresis levels up to high frequencies,  and provide a very special musical experience.

This SJS Arcadia Model 5 Premier amplifier is hot off the bench, and the first to have both triple C-core nanocrystal output transformers and a pair of power supply chokes.

The Premier version of the Model 5 has replaced the 6SN7 input & driver stage with NOS Sylvania  7N7 valves, which are equivalent to 6SN7 but in a Loctal soctet. It also comes with very special Duelund CAST DC silver foil coupling and bypass capacitors, and Audio Note AN-V silver litz input cable, and features the new solid surface non-magnetic transformer covers.

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
  • Star-earth & star-supply wiring
  • Hand built
  • Real solid wooden frame
  • 4mm aluminium panels, black or natural anodized
  • Soundcare SuperSpike feet
  • Very low noise for use with high efficiency loudspeakers

This Premier version includes:
  • Nanocrystalline triple core output transformers
  • Nanocrystalline power supply chokes
  • Duelund CAST DC Silver foil coupling capacitors
  • Duelund CAST DC Silver foil bypass capacitors
  • Tantalum film resistors
  • Pure silver wire for all point to point connections
  • Non-magnetic solid surface transformer covers
Delivered with solid walnut frame, black anodised aluminium panels and the dark grey transformer covers can be heard on demonstration at Definitive Audio in Nottingham alongside the rest of the SJS Arcadia range of amplifiers with Living Voice loudspeakers.

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