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New tubes...far more power??

I replaced my quad set of KT150's in my tube mono blocks a few days ago...replaced with a new set of KT150's that were quad balanced and now for some reason the power output is considerably more. So much so that i need to drop the volume control on my preamp by three notches! Plus, the sound quality is actually no better than before...and maybe even a little strident! Anyone have any idea as to why this would be? 
daveyf

Showing 1 response by joecasey

joecasey
484 posts
 
If old power tubes are worn out, new tubes will sound significantly louder. 

My brother was visiting over holidays and noticed high and bass were missing in my system.   Probably I was used to ... so replaced 16 KT150s and SQ was restored.
Also it takes ~24 hours for KT150 to settle / re-break in.  My tube vendor burns tubes ~200 before testing but doesn't good until ~24 hours of use.
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