need to know what pair of 12au7 sounds great in a preamp i have tried rca clear top sound very good that's the sound iam looking for but more of it...japan brand 12au7 no magic...the siemans were ok...
My 12AU7s and 12AX7s are all ribbed-plate Telefunkens from Andy at Vintage Tube Services. In my opionion, for the most linear sound top to bottom, they are the best. Jason
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