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OTL, Output Transformerless Amplifier User Group.

Much better sound and the pin-outs are different, some resoldering required.

Use of 12AU7s in audio is not a good idea. Cheap for MFRs is the cause.

? See my earlier post further down this thread.


Tim Bailey

Skeptical Measurer & Audio Scrounger

Edits: 10/16/15

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