SW1X DAC IV

TDA1541 DAC with 6V6 Valve Output Stage & Signal Output Transformers

DAC IV is a further development in musical scale & refinement of the already magical sounding TDA1541 based DAC III Balanced, with the introduction of Power Output Valves and Directly Heated Diodes (DHD) in the power supply. The DHD valve power supplies are 2 x choke filtered and quasi dual mono in design.

All our top tier DACs are based on the legendary Philips TDA1541 DAC. The sonic presentation of the DAC IV is another step up relative to the DAC III Balanced; its presentation of music is more mature and is on a larger scale. The transients are presented with a great dynamic bite, making it probably the most dynamic DAC currently in production.

SW1X Audio Design™ DAC IV Features:

• Performance Level 4
• Pure NOS (Non oversampling – zero digital domain filtering) R2R Design
• Highest Grade TDA1541
• Specially Selected and Harmonically Matched Component & Material Quality
• Directly Heated Double Diode tube rectified C2xLC (2 x choke filtered) quasi dual mono power supply
• Anode Choke loaded or Signal Output Transformer De-coupled, Zero NFB, Triode Valve Output Stage
• SW1X Audio DesignCustom Designed Copper wound Super HiB DC core Chokes or Signal Output Transformers
• Discrete Transistor Shunt Regulated Low Voltage Power Supplies
• Orient grain M6 EI core mains Transformers & Chokes
• Outputs: SPDIF, AES/EBU, I2S (RCA & XLR Types)
• Switchable Modes: Single Ended & Balanced

Specially Selected and Harmonically Matched Component & Material Quality

• Specially treated SW1X Audio Design 80% Nickel Mumetal Core Intefrace Transformer
• SW1X Audio Designall Copper (Copper/Silver {Classic} or all Silver {Signature}) wound M6 EI core, Super HiB or Ultra HiB DC core Signal OPT
• M6 grain orient EI core Mains Transformers & Chokes (SHiB double C-core available as an option)
• Black Gate de-coupling Capacitors for TDA1541 DAC
• Internally wired exclusively with our SW1X Magnum, Genesis and Opus conductors of various geometry (single strand or Litz)
• AN Copper Foil in Oil (or Silver foil on request) interstage Signal de-coupling Capacitors
• AB 2W non-magnetic Carbon film Resistors

Tube Compliment

2 x 6J5

2 x 6V6

1 x 5U4G

1 x E180F

1 x EAA91

Versions

DAC IV is available 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 DesignSilver/Silver Windings, Super HiB DC Core OPTs

Colors

DAC V is available in matte Black or satin Silver front fascia and following top panel options:

• Anodised Aluminium in satin Silver or Black finish (standard)
• Brushed Brass (yellow glow)
• Brushed Pure Copper (orange glow)
• Paint Finishes any of the ones stated below:

a) Satin Audi Metallic Grey

b) Gloss Gunmetal Black

c) Gloss Porsche Guards Red

d) Black-Silver Hammered Vintage Paint finish

Optional Extras:

• Fully Hardwired Tube Output Stage on the Bakelite Board
• Fine Silver wiring on the Input, Bakelite Board and Output
• SW1X Audio DesignCustom Designed & Fully or Partly Silver wound Super HiB DC core Signal Output Transformers
• Super HiB double C-Core mains transformers for the digital and DHT/DHD power supplies
• TDA1541R Selected or optional TDA1541A S1 or S2 Selected Crown version
• Silver Foil capacitors Inter-stage Signal de-coupling Capacitors