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.
- Category: Integrated Amplifiers
Description
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
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
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