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Mixed 12AT7 tubes for MC275 MK VI?

Discussion in 'McIntosh Audio' started by Lockheed Mar, Mar 13, 2018.

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  1. Lockheed Mar

    Lockheed Mar New Member

    Messages:
    17
    Hi everyone,

    Des the MC275 can run normal with mixed 12AT7 tubes? I've two MC275 MK VI and recently change 4 pairs of 12AT7 (2 pairs per amp). The problem is I have 3 pairs CV4024 Mullard and 1 pair 12AT7 Brimar.

    Thank you very much for helping :)
     

     

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  2. Pio1980

    Pio1980 AK Member Subscriber

    Messages:
    27,098
    Location:
    Eastern Bamastan
    Best use same in each individual amp, especially if bridged.
    Otherwise probably not critical.
     
    Lockheed Mar likes this.
  3. Seamaster

    Seamaster AK Subscriber Subscriber

    Messages:
    339
    Location:
    Seattle Area
    Should be fine if they are used in a mirror image fashion between the two monoblocks
     
    Lockheed Mar likes this.
  4. Lockheed Mar

    Lockheed Mar New Member

    Messages:
    17
    Thank you, Seamaster, so where is the best position to put the 12AT7 Brimar?

    Thanks.
     
  5. Seamaster

    Seamaster AK Subscriber Subscriber

    Messages:
    339
    Location:
    Seattle Area
    If you like open and sparkling sound stick Brimar into V1. If you like warmer sound, use Mullard in V1 and V2
     
    Lockheed Mar likes this.
  6. Lockheed Mar

    Lockheed Mar New Member

    Messages:
    17
    That's a great! Thank you very much :beerchug:
     

     

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  7. mati1979

    mati1979 Active Member

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    147
    Hi, in Stereo mode ? V1 and V7 ?
     

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