SW1X Audio Design AMP IV Aura

AMP IV is a Pure Class A Amplifier coupled with a High Quality Pre-amplifier using our in house designed and in house made stepped attenuator volume control.

The Directly Heated 2A3 Triodes at the output are well known for their linear & full bodied sound signature. They are driven by 6SN7 valves to produce the classic energetic & emotionally involving sound.

AMP IV is not only extremely musical but also powerful and in the same time refined sounding Integrated Amplifier.

SW1X Audio Design™ AMP IV Integrated Amplifier Features:

• Specially Selected and Harmonically Matched Component & Material Quality
• Pure Class A, Single Ended, Directly Heated Triode, absolutely Zero NFB Valve Amplifier
• 2 x 6SN7 Triode driver/input Stage Valves driving the 2 x 2A3 DHT Valves
• 3 Amplification 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
• SW1X 24 Step Discrete Attentuator Volume Control
• Orient grain M6 EI core mains Transformers & Chokes
• Valve rectified Fixed Bias Power Supply

Tube Compliment: 2 x 6SN7, 2 x 2A3, 1 x 5U4GB, 1 x 5Y3

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
• 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): 4, which sound at least like 25 Watts and the dynamic delivery feel like 250 W
when paired with with High Sensitivity Speakers (min 96dB/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) 250 x Width (mm) 440 x Depth (mm) 400
Weight (kg): 25

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 IV “Aura” Standard

• Tube compliment: 2 x 6SN7 or 6N6P/5687/E182CC Driver, 2 x 2A3 DHT, 1 x 5U4G DHD Rectifier
• Copper wound, orient grain M6 EI Core OPTs (50 Watt) Signal Output Transformers
• Power Output about 4W depending on the tube and bias

AMP IV “Aura” Special

• Tube compliment: 2 x 6SN7 or 6N6P/5687/E182CC Driver, 2 x 2A3 DHT, 1 x 5U4G DHD Rectifier
• Copper/Copper Windings, Super HiB DC Core (50 Watt) Signal Output Transformers
• Power Output about 4W depending on the tube and bias

AMP IV “Aura” Classic

• Tube compliment: 2 x 6SN7 or 6N6P/5687/E182CC Driver, 2 x 2A3 DHT, 1 x 5U4G DHD Rectifier
• Copper/Silver Windings, Super HiB DC Core (50 Watt) Signal Output Transformers
• Power Output about 4W depending on the tube and bias

AMP IV “Aura” Signature

• Tube compliment: 2 x 6SN7 or 6N6P/5687/E182CC Driver, 2 x 2A3 DHT, 1 x 5U4G DHD Rectifier
• Silver/Silver Windings, Super HiB DC Core (50 Watt) Signal Output Transformers
• Power Output about 4W depending on the tube and bias