Most anything NOS will improve your pre. I have used seimens, tungsram, amprex bugle boy all were a nice improvement but my vote goes for the seimens
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It also depends on the circuit, but I have also found the Siemens E88CC, Cca, late 50's, early 60's to be the most synergistic and musical sounding in my preamp. If you go with Siemens, try to find one date coded with A0 to A3. I have an A3 that is very magical. Even the Siemens of the same early 60's manufacture sound differently. Good luck. |
Kevin Deals' (Upscale Audio - no relation) Type 3 6H23EBs Bob Wood http://www.GreatHomeTheater.com/stereo.html |
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