This Atma-Sphere MLS1 is a very rare and early single box line stage version of the legendary MP-1, using two 12AU7’s for gain and dual 6SN7’s for each of the outputs. It uses a total of six tubes and multiple power supplies in a fully balanced, differential circuit from input to output. The outputs are DC coupled with servo control. Ralph Karsten described this preamp as the closest you can get to the MP-1 in a single box.
It was sent back to Atma-Sphere in August for a total overhaul and Ralph gave it “the works”, basically every option they had available to bring it up to their 3.1 level. The preamp received new filter caps, HV regulated power supplies, fast rectifiers, the latest 3.1 version volume attenuator, main power transformer, and state of the art copper CuTF V-Cap coupling caps, as well as a full cleaning of all controls and input/output connections.
US sales only. I will cover US ground shipping (except HI and AK) and Paypal fees at the full listing price of $2650.This is a great opportunity to own the best for less!
PM or email questions to me here on AC and thanks for looking!
Tom
