CEC Who are they?

Challenging questions you pose. I can give a partial answer.

C.E.C. products are made by the Chuo Denki Company in Japan, unless I am mistaken. Their website is www.cec-web.co.jp As the site is in Japanese, I suspect that the initials C.E.C. might be anglicized from Japanese.

I was told a while back that CEC is made by Sanyo Optronics.
Unless they change hands recently.
George

A translation of various parts of the CEC website suggests that the company may have been a subsidiary or affiliate of Sanyo Electric well before Chuo Denki's audio business was transferred to Sanyo Optronics Ltd. (Sanyo Electric Co.'s optical drive division) in 1996. The audio business was transferred to Sanyo Mediatec in 1999 and was then made "independent" in 2000. It is not clear what "independent" means (it could be that it is a separate company with different owners than previously, or it could mean simply that they put a capital structure around it which was different than Sanyo Mediatec's - if I had to bet, I'd say the latter, and that the shareholder is still Sanyo).

I took a look at it because for some reason I thought there had been an association with Kyocera at some point but I can find no reference anywhere that such was ever the case...