I just purchased a 2003 C70 with the Premium Audio which included the 12 speaker Dynaudio speaker. I can not figure these 12 speakers are located. The most important question are there 2 subs behind the seats. If so how are they powered. Thanks

 

Center channel - middle of dash
Front tweeters - sides of dash
Front speakers - 2 per door
Rear speakers - 2 per side, 1 tweeter and 1 mid driver
Rear subs - behind rear seat, 2

If you have the sub option there will be a remote turn on switch in the rear center console. Power comes from the factory amplifier.