Cathode or auto bias?

organ
organ Posts: 4,969
edited May 2012 in 2 Channel Audio
I'm tired of the adjustable bias on my ASL 300B SET integrated. Gonna bring it into the shop and have them change to auto or cathode bias so I can just pop the power tubes in there without manually adjusting the bias.
Can anyone tell me if auto bias is better than cathode bias or the other way around?
The amp already has a lot of things done to it including better output transformers.

Thanks
Post edited by organ on

Comments

  • heiney9
    heiney9 Posts: 25,165
    edited May 2012
    Cathode bias and auto-bias are the same thing, IIRC. Fixed bias is the one where matched tubes are almost a must. If I am mistaken someone will correct me.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
  • heiney9
    heiney9 Posts: 25,165
    edited May 2012
    See I got that backwards in post #2

    http://www.aikenamps.com/WhatIsBiasing.htm

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
  • organ
    organ Posts: 4,969
    edited May 2012
    Thanks H9. So looks like it will be cathode bias.
    Makes rolling so much easier like my EL34 and EL84 amps.