Monday 10 April 2023

SJS Arcadia Model 8 SE 300B Power Amplifier

This SJS Arcadia Model 8 amplifier is our new single ended 300B stereo amplifier. It has been introduced to sonically and visually complement the Model 6 phono amplifier, Model 7 line stage pre-amplifier and Model 9 step up transformers.

The Model 8 is based on the same circuit design and layout as the Model 5, with NOS Sylvania  7N7 valves used as the input and driver stage, and 300B output valves. Internal components include carbon film resistors and Duelund pure copper foil coupling capacitors.

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
  • Aluminium anodised chassis and steel transformer covers
  • Soundcare SuperSpike feet
  • Very low noise for use with high efficiency loudspeakers

Technical Specifications

Input Impedance
100 kOhm
Input Sensitivity
400 mV for full output
Power Output
8W per channel
Frequency Response
+/-3dB 8 Hz-35 KHz
Valve Compliment
2 x 7N7
2 x 300B
1 x 5U4GB
Max. Power Consumption
250 Watts
Unit Weight
30 kg 
Shipping Weight
49 kg
(Original Packaging: Customised flight case)
Unit Dimensions
300mm (h) x 450mm (w) x 400mm (d)
Shipping Dimensions
400mm (h) x 545mm (w) x 500mm (d)

(Original Packaging: Customised flight case)

Delivered with black panels, black anodised aluminium panels and black 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.