Biasing etc Stax T1

Discussion in 'Headphone Amplifiers and Combo (DAC/Amp) Units' started by ihasmario, May 1, 2016.

  1. ihasmario

    ihasmario Rando

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    Hi,

    I have had this setup for quite some time now, and I'd like to check the tubes and bias are still good. I tested the system by ear recently vs my studio setup and I found that the performance was poor: certainly too big a difference to just be headphones vs speakers.

    I quickly looked up how to do the biasing measurements etc, and when I put the multimeter into L- and L+ on the pro sockets I get a reading of 1, but on R- and R+ I get 98. It seems odd for the channels to be so mismatched (considering they both sound fine).

    So I think I am doing it wrong...

    Can anyone give me a hand? Pictures or in person help (Australia) welcome..........
     
  2. n3rdling

    n3rdling Friend

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    Justin did a really good video on checking and adjusting the offset and balance for Stax amps:



    Your right chan offset is way off. Adjust the correct trimmer with a non conductive screwdriver and see how close you can get it to 0 (under 10 should be fine). Also, make sure you do your measurements after the rig has been on and warmed up for a while.
     
    knerian likes this.

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