SW1X Audio Design™ MPA III “Oracle”
Performance Level 3/4/5
45 DHT Mono Power Amplifier
MPA III is a Pure Class A, Zero Negative Feedback, Directly Heated Triode, Fully Valve Rectified, Single Ended, 3 Gain Stage, Interstage Transformer coupled, Mono Power Amplifier.
The Directly Heated 45 Triodes at the output are well known for their superbly refined & magical sound signature.
The 45 valves are de-coupled by Interstage transformers and driven by 6V6 power valves to enhance the refined sound of the 45 triodes with powerful & grungy character of the 6V6.
Combined with the finest Materials & Components, MPA III is extremely refined & musical sounding, especially when combined with high sensitivity speakers
(99dB/W/1m sensitivty is recommended).
SW1X Audio Design™ MPA III Mono Power Amplifier Features:
- Specially Selected and Harmonically Matched Component & Material Quality
- Single Ended, absolutely Zero NFB, Class A, Directly Heated Triode Valve Power Amplifier
- 6V6 Valve Driver/6J5 input Stage driving the 45 DHT Valves
- Interstage Transformer de-coupled, 3 Gain Stage Design
- Hybrid 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 Copper wound Super HiB DC Core (50 Watt) Signal Output Transformers
- 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 6V6, 2 x 45, 2 x 5U4G, 2 x 5Y3
MPA III Oracle is avaiable in 4 Versions with following 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
- Fully Hardwired Tube Output Stage on the Bakelite Board
- Fine Silver Hardwiring of the Bakelite Board
Specifications
Single Ended, Class A, Zero NFB, Output Power (W): 2, which sound at least like 15 Watts and the dynamic delivery feel like 150 W
when paired with with High Sensitivity Speakers (min 99dB/W/1m is recommended)
Input Sensitivity (V): 1
Input Impedance (Ohms): 47K or 100K
Output Impedance (Ohms): 4 & 8
Max Power Consumption (W): 200
Output Noise, Unweighted (mVrms): < 0.5
Dimensions (without tubes and feet): Height (mm) 200 x Width (mm) 250 x Depth (mm) 440
Weight (kg): 44 (pair)
Note: Due to SW1X Audio Design’s ongoing research and development process, specifications are subject to change without notice
See more Mono Power Amplifiers
Follow us on Facebook, Instagram, YouTube and Pinterest. Join the official SW1X Audio Club
