Sony MDR-1RBT headphones have crackling or pops in audio when using bluetooth on my iMac - Mountain Lion

I notice crackling noise or pops when I listen to music using my Sony MDR-1RBT bluetooth headphones with my 3.4GHz Intel Core i7 iMac running  OSX 10.8.5
I do not hear the crackling when I listen to the headphones using my MacBook Pro 2.7GHz Intel Core i7 with OSX 10.8.5
I also do not hear the crackling when using wired connection to the headphones.
So it would seem that something with the Bluetooth on the iMac is the problem. But I have no idea how to troubleshoot this further.
Does anyone have any ideas what the cause may be?
I am pretty sure that it is not interference from another device because I can connect to my MacBook Pro in the same area as my iMac with no crackling

Hi Michael Erb1,
Thanks for using Apple Support Communities.  It may also be worth resetting the NVRAM of your iMac to see if that helps with the crackling:
About NVRAM and PRAM
http://support.apple.com/kb/HT1379
Cheers,
- Ari

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