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SW1X AMP IV Aura Integrated Amplifier Wifi Bluetooth

SW1X Audio Design™ AMP IV “Aura”

Performance Level 3/4/5
2A3 DHT Integrated Amplifier


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 AMP IV Aura Integrated Amplifier Wifi Bluetooth pm7000

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 DesignCustom 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


AMP IV is avaiable in 4 Versions with either Satin Silver or Matte Black front Panels with a following output transformer (OPTs) specifications:

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


SW1X Audio Transformers


Optional Extras

  • Silver wound SW1X Audio DesignCustom 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




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


SW1X Integrated Amplifier Products Overview


Note: Due to SW1X Audio Design’s ongoing research and development process, specifications are subject to change without notice

SW1X AMP IV Aura Integrated Amplifier Wifi Bluetooth


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