SW1X Audio Design MPA III Oracle

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 2 x 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
• 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 6V6, 2 x 45, 2 x 5U4G, 2 x 5Y3

Optional Extras

• Fully Hardwired Tube Output Stage on the Bakelite Board
• Fine Silver wiring on the Input, Bakelite Board and Output
• Silver wound SW1X Audio Design™ Custom Designed Super HiB or Ultra HiB DC core Signal Output Transformers
• Black Gate VK capacitors in the B+ power supply
• AN 2W non-magnetic Niobium resistors on a Hardwired Bakelite Board
• Super HiB double C-Core mains transformers

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.

SW1X Audio Design® Range of Integrated Amplifiers
It is all about Quality and not Quantity.

All of our Integrated Amplifiers are Pure Class A Valve Amplification with Zero NFB and most of them are Single Ended, producing therefore super Quality 2-8 Watts of power, which sound like 20-80 Watts when paired with with High Sensitivity Speakers (min 96dB/W/1m is recommended), where damping and dynamic delivery feels like 200-800 W

Being Valve amplifiers operated in Pure Class A, Single Ended mode without any kind of feedback, the circuit design is as elegantly simple as it can get.

Therefore, the quality of amplification is almost entirely dependent on the factor of Quality of Materials & Componets employed in the circuit design.

All our Integrated Amplifiers are offered in 4 versions:

• STD, all Copper wound, orient grain M6 EI Core OPTs
• Special, all Copper wound Super HiB DC Core OPTs
• Classic, Copper/Silver Windings, Super HiB DC Core OPTs
• Signature, Silver/Silver Windings, Super HiB DC Core OPTs