Many thanks for the recs, guys. In researching the Sophia 274, I see references to the cap following the rectifier needing to be pf a particular value. May I assume the caps in Dennis's products do in fact fall within the acceptable range? Also, would the Sophia make much difference in the Inspire 3.1 preamp? I'm enjoying higher power tubes in my Inspire Firebottle amp right now--for whatever reasons they seem more suited to gripping the Altec's woofers than the smaller tubes--so am using a Mullard 5AR4, which is getting the job done. Naturally I'm going to continue to experiment and would be excited if the addition of a Sophia 274 with lower output tubes might also be able to add some oomph to the power amp. As you can see, I'm interested in researching what might result in maximum grunt from the 3.1 preamp and Firebottle amp. Many thanks!
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