SW1X Audio Design AMP II Electra

AMP II is a Pure Class A, Single Ended Amplifier. It is essentially a 2 gain stage Power Amplifier coupled with a High Quality Pre-amplifier.

It therefore is not only extremely transparent but also very musical and powerful sounding Intergated Amplifier.

The Triode Connected 6V6G Power Valves offer the same level of scale and holography as the Directly Heated Triodes without being DHT.

Available in different versions: Special and the Classic version with different power output transformer options (Permalloy or SHiB and UHiB) and all Copper or Copper/Silver windings

SW1X Audio Design™ AMP II Integrated Amplifier Features:

• Specially Selected and Harmonically Matched Component & Material Quality
• Single Ended, Zero NFB, Class A, Power Pentode (Triode Connected) Valve Power Amplifier
• Only 2 Amplification Gain Stages
• Hybrid Point 2 Point Hardwiring Technique for the most consistent production results
• 2 x 6J5 Triode driver/input Stage valves driving the 2 x 6V6G Triode Connected Power Pentode Valves
• 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
• Internally wired exclusively with our SW1X Genesis and Opus conductors
• Orient grain M6 EI core mains Transformers & Chokes
• Valve rectified Fixed Bias Power Supply

Tube Compliment: 2 x 6J5, 2 x 6V6, 1 x 5U4G

Optional Extras

• SW1X Audio Design™ Custom Designed & Fully or Partly Silver wound Super HiB or Ultra HiB DC core Signal Output Transformers
• SW1X 24 Step Discrete Attentuator Volume Control
• Fully Hardwired Tube Output Stage on the Bakelite Board
• Fine Silver wiring on the Input, Bakelite Board and Output
• 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
• Inter-stage signal decoupling capacitors: 1. Copper Foil in Oil or 2. Silver Foil capacitors
• AN 2W silver, non-magnetic, Tantalum resistors

Specifications

Single Ended, Class A, Zero NFB, Output Power (W): 6, which sound at least like 35 Watts and the dynamic delivery feel like 350 W
when paired with with High Sensitivity Speakers (min 96dB/W/1m is recommended)
Input Sensitivity (V): 2
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) 250 x Width (mm) 440 x Depth (mm) 400
Weight (kg): 21

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
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

AMP II and AMP III can be ordered with differnt input sensitivity of below 1V RMS and around 2V RMS, called High Gain and Low Gain versions respectively.

AMP II “Electra” Low Gain

• Tube compliment: 2 x 6J5 Driver, 2 x 6V6 or 6L6, 1 x 5U4G DHD Rectifier
• Copper wound, orient grain M6 EI Core or Super HiB DC Core (50 Watt) Signal Output Transformers
• Power Output about 6W depending on the tube and bias

AMP II “Electra” High Gain

• Tube compliment: 2 x 6SJ7 Driver, 2 x 6V6 or 6L6, 1 x 5U4G DHD Rectifier
• Copper wound, orient grain M6 EI Core or Super HiB DC Core (50 Watt) Signal Output Transformers
• Power Output about 6W depending on the tube and bias