SW1X Audio Design™ DAC III Features:
- Pure NOS (Non oversampling – zero digital domain filtering) Design
- Selected and Harmonically Matched Component & Material Quality
- Based on 1x TDA1541 – the most analogue sounding R2R DAC ever made
- STD, Anode Follower, Zero Negative Feedback, Single Ended, Class A, RC (resistive loaded, capacitive de-coupled) Valve Amplification Topology
- 6N6P or 5687 Double Triode Driver Valve Output Stage
- 6X5 Indirectly Heated or Directly Heated 5Y3 (5R4 as an option) Valve rectified CLC (choke filtered) Power Supply
- Dynamic Element Matching (DEM) of the TDA1541 is powered by an asynchronous E180F Valve Clock with EAA91 Valve rectified Power Supply
- Active I/V conversion via a single specially selected transistor (with less than 10 Ohm input impedance) with the shortest signal path directly connected to the tube grid
- Circuit is wired with of a specially selected copper (single strand or Litz)
- Discrete Transistor Shunt Voltage Regulated Power Supplies for the TDA1541, SPDIF receiver and active I/V conversion
- Supports up to 24Bit/96kHz (optional up to 48 kHz only) digital coaxial S/PDIF signal input (USB input is optional, see in options below)
- 3 x EI core Mains Transformers & Chokes
Tube Compliment: 1 x 6X5 (5Y3 or 5R4 as an option), 1 x 6N6P (or 5687/E182CC as an option), 1 x EC86, 1 x EAA91
Optional Extras:
- AN Copper foil, mylar in Oil signal output decoupling capacitors
- Black Gate capacitors around TDA1541
- AN 2W copper, non- magnetic, tantalum film resistors on plates of the output tube
- 5687/E182CC or 6N6P Premium 6N6P from the 60s or Premium vintage NOS black plate Tung Sol 5687/E182CC output tube
- Directly heated vintage 5R4 type of tube (from the 60s) in the PSU
- Additional choke filtering on the DEM clock tube PSU for the TDA1541
- USB input with a tube master clock, powered by an separate transformer
- 2 x HiB double C-Core mains transformers for the TDA1541 and DHT/DHD power supplies
Specifications
Dimensions STD version: Height (mm) 150 x Width (mm) 340 x Depth (mm) 400
Dimensions Custom with USB version: Height (mm) 150 x Width (mm) 440 x Depth (mm) 400
Weight (kg) STD version: 13.6
Weight (kg) Custom with USB version: 15.6
Max Power Consumption (W): 33
Output Noise, Unweighted (mVrms): < 0.5
Output Impedance (kOhms): <1
