Does a new cd transport require break-in time?

I got reply from Cambridge Audio customer servise that it needs about 50 hours break-in time but my CXC was very good from the beginning and over time didn't notice any change .

Very strange that the Gungnir doesn’t sound better with the Cambridge CXC once I hooed up mine to my McIntosh dac the improvement was immediate and substantial with explosive dynamics and huge soundstage maybe it’s due my Tellurium Black coax cable which allows the CXC to perform very well ?

What cable you are using now ?

I had the Rotel RCD-1570 before which cost twice the CXC , It wasn’t a bad CD player but when I bought the Mcintosh DAC I felt that as a pure transport it degraded the sound severely .In the future maybe I will upgrade the CXC to the CEC TL5 .

Synergy between components is very important maybe the CXC and the Gungy are not a good match .The CXC ia a pure transport so its sound is very neutral this allows the DAC to determine the sound signature . I achieved  big improvement with the CXC in 2 main areas :The dynamic spectrum is wider the bass is stronger and deeper and the highs are more precise, Secondly much more details and accurate sound stage.
I realy don't know what eent wrong in your system. 

I don’t think the impedance is the problem here.CXC specifications mention that the impedance is around 75 ohms but not beyound that ,I know it's strange to quote it this way but the bottom line is that the impedance is actually 75 ohms.

I agree with char2 although in my case the CXC was great from the beginning I guess in general it needs about 50 hours to break-in as some reports I read at other forums  , further more maybe there is a need to upgrade  your coax cable to allow better transmission of the data from te CXC to your dac .dac in general needs long term break-in period not less than 100 hours so don't judge your system after so short time you have to be patient my McIntosh dac for example was lousy at the beginning very harsh and bright especially on high levels volume it took about 3 month for break-in and now it's amazing .

Seems to me like a sh***t company .it's a shame.