SW1X DAC II

SW1X Audio Design™ DAC II Performance Level 2 D to A Converter

DAC II is based on 2 x PCM56 DACs with more sophisticated power supplies and powerful 6N6P/6N30P/5687/E182CC valve output stage with 6X5GT (or GZ34/5Y3/5R4 as an option) valve rectification. The DAC has a similar analogue character akin to DAC I, steps up in low level musical refinement and offers presentation on another level. The transparency and the low level resolution of the DAC II easily reveals any imperfections in a recorded  material.  The more dynamic sounding active I/V (current- to voltage conversion) stage is directly connected to the single ended class A, zero feedback, anode follower 6N6P/5687 tube output stage. The whole circuit has only one decoupling capacitor per channel in the signal path. Everything, including the whole signal path is wired with specially selected copper conductors & dielectric from input to output. The DAC II is also available in the Special or Signature version, which is available on custom built to order basis only.

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SW1X Audio Design™ DAC II Features:

• NOS (Non oversampling –zero digital domain filtering) design
• Specially selected and harmonically matched component & material quality
• Based on 2 x PCM56P K – the most refined and highest resolving sounding 16 bit DAC chips ever produced
• Active I/V conversion via a special transistor (with less than 10 Ohm input impedance)
• Single ended, anode follower, zero feedback, 6N6P/5687 double triode valve output stage
• Output stage signal decoupling capacitor options a) Tesla PIO or b)  Audio Note Copper Foil Mylar in Oil capacitor
• 6X5GT double diode valve rectified CLC (choke filtered) HV power supply
• Discrete Germanium transistor based shunt voltage regulated power supplies
• Circuit is wired with of a specially selected copper (single strand or Litz)
• Supports up to 24Bit/96kHz or optional up to 48 kHz only digital coaxial SPDIF signal input (USB input is optional, see in options below)
• 2 x 110/115/230/240V AC mains transformers

Optional Extras:

a) Audio Note Copper foil, mylar in Oil signal output decoupling capacitors

b) Audio Note 2W copper, non- magnetic, tantalum film resistors on plates of the output tube

c) the STD version of DAC II can be ordered with either US made 5687/E182CC or Soviet 6N6P Premium 6N6P from the 60s or Premium vintage NOS black plate Tung Sol 5687/E182CC output tube 

d) semi directly heated vintage GZ34 type of tube (from the 60s) in the PSU 

e) output wiring is normally 1 x pair in fine silver and other is copper (by default), This way one can fine tune the sound by using either output. optional is all silver or all copper wiring

f) USB input with tubed master clock, powered by a separate transformer

g) 2 x HiB double C-Core mains transformers for the PCM56 DAC and 6N6P/5687 & DHT/DHD power supplies I) SHiB C-cored B+ filtering choke

DAC II is availble with C- and EI- cored Super HiB signal and power transformers (or chokes) as an optional extra  

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

Specifications

Dimensions: Height (mm) 130 x Width (mm) 335 x Depth (mm) 400

Weight (kg): 9.6

Max Power Consumption (W): 18

Output Noise, Unweighted (mVrms): < 0.5

Output Impedance (K Ohms): <1

Tube Compliment:  1 x 6X5GT(6C4S) (GZ34 Special version), 1 x 6N6P (5687 Special version)  

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