Line Magnetic 845 Premium bias setting. Advice needed!

The manual is very poor unfortunately. Thank you.

mika, if you learn anything, please let us know.

What about sending email to the former owner?  He/she must know how to set bias.

Hello everyone,

Good news!

I emailed Jonathan Halpern from Tone Imports and Charlie Schnyder from Stereo Haven and they both promptly replied within an hour or two and they both said the same thing.
Apparently the knobs in the front are for fine tuning and not of much importance. The bias is adjusted mainly by the screws on the top for each tube. As long as the needles rest on the middle dot for each tube everything is ok.
This has been bugging me ever since I got the amp and I even emailed Line Magnetic in China and still the reply I got was far from useful.
These two guys put my mind at rest. Can't thank them enough!
:-)

@mika75

wow line magnetic doesn’t supply a manual with proper instructions on how to set tube biasing?! that brand is supposed to be cream of the crop among chi-fi tube amps -- 👎

anyhow, glad you got it figured out...