Oppo Sonica DAC upgraded to Modwright Custom Tube Mod and LPS -
Upgraded NOS tubes and Wywires umbilical - $1100 Retail
E88CC Telefunken NOS tubes (2)
5R4GY RCA CRC- JAN 1940s dark brown base,
double D bottom getters (1)
5AR4/GZ34 Amperex (Holland), 1959;
dark brown base/White Label (1)
Tube mod includes:
Total redesign and replacement of op-amp based stock analog stage
with a fully balanced, pure Class A, tube/transformer coupled analog stage
(6922 driver tubes).
External PS 9.0 v. 10 with tube rectifier (5AR4, GZ34, 5R4GYS 5U4,
5V4 and equivalents).
Truth umbilical of our own design.
Highest Quality resistors in key signal path applications.
All MWI M-type capacitors in signal path.
External supply with optional hole to allow for use of taller,
larger diameter tubes other than 5AR4/GZ34.
Dan Wright’s thoughts:
The Sonica DAC has fabulous technology and connectivity, including
all current DSD decoding abilities. In stock form, I found it very revealing,
but a bit cold and clinical. With our new fully differential, transformer
coupled analog stage (6922 based), I am VERY pleased. It is still revealing and
open, but the sound stage is much bigger and the sound is more organic with
none of the hard edge or glare of the stock unit. Importantly, I find the
Sonica DAC mod to be more resolving and dynamic than our past Oppo mods. I feel
the Sonica to be among the best mod sound that we have ever produced.