What is the best phono preamp you have heard?

I live and work in the Valley. Who is your board supplier?

Dear 4yanx: Sierra Proto.

Regards and enjoy the music.
raul.

Dear Dear Swampwalker : Our Phonolinepreamp is an active high gain design: no step-up transformer/autoformers inside/out.

The gain can be tailored up to 100db with the same quality performance: no trade-offs.

Regards and enjoy the music.
Raul.

Dear Swampwalker: Finally, something that help us to make a minimum trade-offs on the circuit/layout design was the extensive use of specialty computer help/design platafforms like: Spice, Ultiboard, electronic Workbench/Multisim, etc.., were we can confirm the validity and truthful of our work.

Regards and enjoy the music.
Raul.

Dear 4yanx: I wonder why do you have interest on our circuit board supplier? do you need it?

Regards and enjoy the music.
Raul.