Esteban... Interesting comparison and conclusions. I will say that my PL HP sounded dramatically different with KT120's vice the EL34's. I did not like the stock EL34's with my Sonus Faber's...sound was weak in the bass and the tone was somehow "off". The KT120's were a vast improvement.
Between the tubes and being not broken in, I suggest not writing off the HP just yet...
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Kevin
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