K&K phono break-in period


Just thought to ask fellow owners of this phono stage on their experiences on the break-in period. I finally took the plunge building the Maxxed-out version (w/ Tantalum resistor & LL1931 upgrades) which I completed 2 days ago. It will be compared to my 7 year old AES PH-1 phono pre. Been following the K&K phono evolution (rave reviews) since 2003 which is how I got convinced to finally get it. Building it was so much fun and quite straight forward. Never had a problem putting it together. However, it needs to be broken-in...I'm leaving it powered-on for at least 5 days continuos per intructions.
Can anyone tell me approximately the length of burn-in before I can hear improvements in sound? 100-200 hours? Maybe longer as you have the tubes, Capacitors and transformers to break-in...
How did your units sounded right after build? One thing I noticed is this unit is dead quite! The bass is just phenomenal... Any comments/advice on this or what else to expect would greatly be appreciated...Thanks in advance.
jolen1aub

Showing 1 response by john_tracy

250-300 hours will get you 95% of the way. 500 hours will get you another 3%. That last 2% will happen after ~1000 hours. At last count there are 20 Lundahl signal transformers in my system! I am well acquainted with the break-in drill. And yes, Kevin does appreciate my business.