The phono pre-amplfier is based on a classic all valve circuit design used to master vinyl recordings and master tapes.
It is a two gain stage design consisting of 2 (one for each channel) pentode valves on the input and one double triode valve on the output.
The input stage utilises lush sounding EF86 valves in pentode mode, which are loaded by passive RIAA equalization network (series resistor-less, dynamics preserving), driving the powerful 6N6P or 5687 double triode on the output stage
SW1X Audio Design™ LPU I Features:
a) AN Copper foil, mylar in Oil Signal Output de-coupling Capacitors for Interstage and Output Stage
b) AN 2W copper, non- magnetic, tantalum film resistors on plates of the output tube
c) 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) Directly Heated 5Y3/GZ34 type of tube (from the 60s) in the PSU
e) Orient Grain, M6 EI Core, Copper flux banded, mains Transformer
Note: Due to SW1X Audio Design’s ongoing research and development process, specifications are subject to change without notice.
Dimensions: Height (mm) 140 x Width (mm) 340 x Depth (mm) 410
Weight (kg): 8.5
Max Power Consumption (W): 12
Output Noise, Unweighted (mVrms): < 0.5
Output Impedance (k Ohms): <1
Tube Compliment: 2 x EF86, 1 x 6N6P or 5687, 1 x 6X5 or 5Y3
Front panel options: brushed Silver or matte Black