question regarding BOSE symphony and concert
 

hey,

i have a 2001 a4 2.8l quattro, with the BOSE symphony system.
i have a blown rear speaker, and cant seem to find a symphony speaker
however, i did find someone with a 99 a6 2.8l which has the BOSE concert series stereo.
my question, can i just straight swap the rear speakers with no issues, or is the independance different in them?

thanks