Breeze +1
About the breeze and the tcxos it uses, there is a bit of info on ebay. Says jitter is -130db at 1kz. So, in my understanding, changing the tcxos to ndk or crystek should improve bass response.
I contacted diyinhk to ask if they would be interested in selling ndks on adapters. You never know.
Yes I agree! NDK SD's on std 14 DIP adapter would be a winner. I hope you're successful. I can't believe Crystek doesn't either.
The clocks you see in all these Chinese DDC's are OEM JYEC clocks - if you order enough I guess they'll print your companies logo on the cover.
I have used the Vanguard version of these in other mod projects. Not quite sure if the 'gold' version is any different the the Gustard U12 'silver' version.
I have seen -125db and -130db @1Khz quoted - it would be nice to get readings at different frequenices - or a plot. Interested to the the 100Hz and 10kHz numbers.
http://www.chinafronter.com/wp-content/uploads/2015/08/VCTCXO-SMD5032新.pdf
This one looks different - but is Chinese TXCO these are the readings:
-115db@100Hz
-135db@1kHz
-148db@10kHz
I believe it comes in three versions, with various degrees of stability: 0.5+-ppm, 1.0+-ppm, 2.0+-ppm
All very good numbers for stability - but as with all crystals they will degrade over time and decease in stability.
also voltage variations and tempurature changes will cause variations. So best to keep you DDC running and 'warm' and use high quality power supplies and filtering