A4/Q5 Rear 165
Rear Speaker System for Audi A4/Q5
(A4-R61 + A4-RTW1 + A4-RTW1-C1)
A4-R61: The A4-R61 uses the ESB CS-W61 6.5"/16.5 cm component mid-woofer, with special adaptor to fit the Audi A4/Q5 original woofer housing in the rear seats.
A4-RTW1: The A4-RTW1 uses the ESB CS-T21 1"/2.5 cm component tweeter, with special adaptor to fit the Audi A4/Q5 original tweeter housing in the rear seats.
A4-RTW1-C1: ESB A4-RTW1 dedicated crossover.