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What does going from a 6.6K OT to 8K do?

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  • What does going from a 6.6K OT to 8K do?

    I read an earlier thread about 5E3's having 8K output transformers and got from that I would get less distortion, but what does it do for the frequency balance of the amp. Does it increase the bass response resulting in the need for .02 caps and humbucker mods?

    Right now, mine(stock, but 6.6K OT) has plenty of top end, the bottom sounds great with a Strat clean, and with the volume on 6+ and a LP(SD 59s) it has that stack-style distortion. I'm playing it through an old Mojotone P12R speaker(the Eminence version similar to the older Fender blue frame alnico 10's), but that may change too.

  • #2
    It depends on the speaker you are using and what its impedance actually is. Every speaker/ cabinet combination will react differently to it. Is your "8 Ohm" speaker really closer to 6 Ohms at it minimum or 10 Ohms? How high is the low frequency resonant peak? How quickly does the impedance rise on the top end of the driver?

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    • #3
      Sorry, maybe I should have been clearer - I was asking about Output Transformers. The earlier thread was:

      http://music-electronics-forum.com/s...ransformer+5e3

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      • #4
        Everyone's ideas about tone are subjective (as we al are aware).

        So if you get an OT made up that has a reflected load of 8k on the primary with a 9.7R secondary and an 8R tap, you will be able to run an 8R speaker at ~6k6 or 8k respectively. Then you can see for yourself.
        Building a better world (one tube amp at a time)

        "I have never had to invoke a formula to fight oscillation in a guitar amp."- Enzo

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