Here's a better way...
Wire all four main cabin speakers to the rear channels of the existing APX480 (parallel wired, 2 ohm load on the amp)
Wire the bow speakers to the front channels of the same amp.
Wire the tower bridged to the new amp.
No sub?
Wire all four main cabin speakers to the rear channels of the existing APX480 (parallel wired, 2 ohm load on the amp)
Wire the bow speakers to the front channels of the same amp.
Wire the tower bridged to the new amp.
No sub?