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has anyone tried a 12au7 in a valve jr.? (head or combo)


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Sure have. You are not going to get dBs and dBs of volume from one, but it will move your sweet spot up to about 3 o'clock, when compared to the stock tube at 2. A 5751 would be even more effective. Again, you aren't going to get stadium filling volume just by changing the preamp tube. It will model your tone somewhat, and the headroom increase will be noticeable.

Posted
Sure have. You are not going to get dBs and dBs of volume from one' date=' but it will move your sweet spot up to about 3 o'clock, when compared to the stock tube at 2. A 5751 would be even more effective. Again, you aren't going to get stadium filling volume just by changing the preamp tube. It will model your tone somewhat, and the headroom increase will be noticeable. [/quote'] ok. i like little bits of headroom...

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