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

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    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

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    Angel Station, Alabama
    Best use same in each individual amp, especially if bridged.
    Otherwise probably not critical.
     
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  3. Seamaster

    Seamaster AK Subscriber Subscriber

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    Seattle Area
    Should be fine if they are used in a mirror image fashion between the two monoblocks
     
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  4. Lockheed Mar

    Lockheed Mar New Member

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

    Thanks.
     
  5. Seamaster

    Seamaster AK Subscriber Subscriber

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    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
     
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  6. Lockheed Mar

    Lockheed Mar New Member

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

     

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