SW1X Audio Design™ SPA V Zenith

Performance Level 3/4/5 300B DHT Power Amplifier

SPA V is a 3 gain stage Stereo Power Amplifier without input switch and volume control. Therefore it is ideally paired with our PRE III or PRE IV Line Pre-amplifier.

The Directly Heated 300B Triodes at the output need no introduction. They are driven either by popular 6J5/6SN7 input/driver tubes or with the powerful 6V6 to produce seemsless linear and balanced sound.

Available in different versions: Standard, Special and the limited Classic or Signature versions with different power output transformer options (M6, SHiB and UHiB) and all Copper or Copper/Silver windings

SW1X Audio Design™ SPA V Integrated Amplifier Features:

• Specially Selected and Harmonically Matched Component & Material Quality
• Single Ended, absolutely Zero NFB, Class A, Directly Heated Triode Valve Power Amplifier
• 2 x 6J5/6SN7 Triode driver/input Stage Valves driving the 2 x 300B DHT Valves
• 3 Amplification Gain Stage Design
• Point 2 Point Hardwiring Technique for the most consistent production results
• Internally wired exclusively with our SW1X Magnum, Genesis and Opus conductors
• SW1X Audio Design™ Custom Designed (50 Watt) Signal Output Transformers
• Quasi Mono, Directly Heated Double Diode Valve Rectified B+ Power Supply
• Orient grain M6 EI core mains Transformers & Chokes
• Valve rectified Fixed Bias Power Supply

Tube Compliment: 2 x 6J5, 2 x 6SN7, 2 x 300B, 1 x 5U4GB, 1 x 5Y3

SPA V is avaiable in 4 Versions with either Satin Silver or Matte Black front Panels

Output Transformer (OPTs) Specifications:

• Standard: SW1X Audio Design™ all Copper wound, orient grain M6 EI Core OPTs
• Special: SW1X Audio Design™ all Copper wound Super HiB DC Core OPTs
• Classic: SW1X Audio Design™ Copper/Silver Windings, Super HiB DC Core OPTs
• Signature: SW1X Audio Design™ Silver/Silver Windings, Super HiB DC Core OPTs

Optional Extras:

• Silver wound SW1X Audio Design™ Custom Designed Super HiB or Ultra HiB DC core Signal Output Transformers
• Fully Hardwired Tube Output Stage on the Bakelite Board
• Fine Silver wiring on the Input, Bakelite Board and Output
• AN 2W non-magnetic Niobium resistors on a Hardwired Bakelite Board
• Super HiB double C-Core mains transformers
• Inter-stage signal decoupling capacitors: 1. Copper Foil in Oil or 2. Silver Foil capacitors
• AN 2W silver, non-magnetic, Tantalum resistors