Your CEC transport is a 100-volt Japanese version. You need to use a Japanese-made transformer for optimum sound quality. Your CEC only uses 10 or 11 watts, so the free transformer which was included is a low-end unit (perhaps a 35-watt Kashimura).
My recommendation is that you should obtain a Nissyo NDF-550U. Using this transformer will eliminate the need for a power conditioner, because it takes USA-117 volts and brings it down to 100-volts. Only use a Japanese transformer for a Japanese unit, because the cords on the transformers cannot have a groundpin. If you are interested in the Nissyo, e-mail me, as I know how to find one for $120, imported from Japan. Thanks.