IT is a 8" sub woofer an there is only 1 located in the rear of
the car on the passenger side.
View page
The power is actually on the Sub woofer. There is a power cord
that connects tot he sub woofer and then there is a data-ish cable
that goes from the woofer to the actual 321 media center. That
carries the electricity as well.
View page
The duration of Pictures with Woofer is 1800.0 seconds.