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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
palasr
525 posts
 
While leaving the unit running initially is a great idea, you really need to run signal through it for 200-300 hours to fully break the unit in - that's quite a few records! Several people I've recommended the unit to have commented that it takes "a while" for it to break in; some folks are impatient with their audio and sell the unit prematurely, and that's a shame because they are missing out on a wonderful phono stage. There's a lot of transformer wire in the K&K as well as those huge Cardas caps. After owning it for several years now, it still delights me.
john_tracy
341 posts
 
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.
jolen1aub OP
57 posts
 
Thank you to everyone who chimed in! I'm currently using my old faithful pickering XSV3000 MM Cart. Have been listening for an average of 2-3 hrs these last 7 days. I will post my experience after the 1000 hrs break-in period (hopefully I don't forget).
My initial impressions are (although too early)..excellent authoritative BASS!, DEAD QUIET, everything sound much bigger (like performers are in the room with you)....somewhat veiled at this point..
I look forward to upgrading to MC (Denon DL-103R) in the near future.

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