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Amp II Electra Integrated Amplifier

SW1X Audio Design™ AMP II “Electra”

Performance Level 2/3
Integrated Amplifier


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

Amp II Electra Integrated Amplifier

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 DesignCustom 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 DesignCustom 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




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


SW1X Integrated Amplifier Products Overview


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

Amp II Electra Integrated Amplifier Internal

Amp II Electra Integrated Amplifier Internal


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