SW1X AMP IV “Aura” Integrated Amplifier

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 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

Reviews

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 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

SW1X Audio Transformers

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