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The Right Preamp For My First Watt F4

Posted 11th May 2016 at 05:36 PM by oltos

Hello SY,

I have one First Watt F4 amp, so Iíd be running it stereo unbalanced to drive my speakers.

Since the Impasse debuted, have you or others implemented any revisions that I should know about?

My speakers are at least 94db sensitive, my room is 16 ft x 14 and my ears canít tolerate average SPLs much beyond ~ 60db-at least not much above the lower midrange band (i.e. allowing for the Fletcher-Munson effect). My midwoofers are cut off below 70Hz, where my pair of Rythmik 12" sealed powered subs take over.

Except for the subwoofers, my speaker system is a clone of Gary Dahlís Azurahorn 425/Radian 745 Neo Be/GPA Altec 416 system.

Are there certain tube suppliers of specific brands of 6SN7 tubes, or better sounding alternatives, that you would recommend for best performance with my speakers, such as https://www.sophiaelectric.com/ ?
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