Currently using Philips SQ E88C tubes in my preamp (Lector Zoe ) and am looking for another tube that can give me the same detail, but a little warmer / softer on the top.
Siemen grey plate 12au7,find them buy them fantastic detail and midrange they let the music come through.I had to replace my telefunkens which are very smooth almost to smooth in my system but may work for you I just cannot pass up the midrange of the siemens.
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