cd player - xlr output buzzing


currently using the xlr output of this cd player;
http://www.cattylink.com/page153.html

to the RCA input of this preamp;
http://www.cattylink.com/page309a.html

I am using a generic female xlr -> male rca cable. Each time I start the system up, there is buzzing and harmonics in the speaker output at low volumes. It is okay at higher volumes. I tried to see if it is the tubes, or the output, but nothing alters the problem except using the RCA output of the cd player into the RCA input of the preamp.

The only reason I don't use the RCA output is that it runs directly to another amp/system and the RCA cable is far longer than the XLR->RCA cable.

Is there any possibility that the higher vrms of the xlr output is causing the buzzing? Would it be wiser to simply buy an xlr female to xlr male adapter and then use an RCA->RCA cable in conjunction with the adapter to see if the buzzing continues?
bleoberis
Yes, splitting the rca is perfectly safe, and the very low output impedance of the cdp will mean that any sonic effects of having two loads and two cables attached to each of the rca outputs should be negligible.

Ground loop issues might still be a possibility, along the lines of what Dave suggested. But if need be those could be addressed with cheater plugs, or connecting to different ac outlets, or isolation transformers or other measures that are commonly used to address ground loop problems.

Re your last question, if my theory is correct, then yes the buzzing would remain if you continued to use the adapter cable. It is conceivable, though, that it might be avoided with a specially constructed cable that left pin 3 unconnected.

Good luck!
-- Al
haha we have come full circle (kind of) in that this is the opposite of what Atmasphere first posted!

The key is then whether pin 3 is left floating or not?

I just picked up some of these;
http://www.amazon.com/Hosa-GXM-133-Female-Male-Adaptor/dp/B000068O4D

I know for certain that these have pin 3 tied to pin 1, thus, if the buzzing continues tonight when I test it, I'll have a cable made leaving pin 3 floating.

If that does not work, then I'll have an XLR->RCA yard sale and you are all invite. Beer is on me.
I suspect that Atmasphere was thinking xlr input when he wrote his post, rather than xlr output.

Heineken or Samuel Adams would be great as far as I'm concerned :)

-- Al
Sam Adams it is - the cherry flavoured one. We can get it here in Australia!

Just book your flights and I'll chuck a prawn on the BBQ
I wonder if one of these XLR to RCAwould help

You should be able to find less expensive models by other Mfgers if you Google around

I also noticed that your CD player's output voltage on the XLRs is 4 Volts and that your preamps input voltage is only 215 MV ... could it be possible that you are picking up some of the noise floor from the CD player because of it's high output relative to the preamps very low input sensitivity ?????????