8" SUBWOOFER
Try to use Toyota speaker adapter plugs so you don't need to cut wires and mess the electric system up. You can get them from Ebay or Amazon.
The 2001 Toyota Avalon has 37.9 in. of rear head room.
The 2001 Toyota Avalon has 40.1 in. of rear leg room.
The 2001 Toyota Avalon has 55.1 in. of rear hip room.
The 2001 Toyota Avalon has 58.1 in. of rear shoulder room.
The rear track of the 2001 Toyota Avalon is 5 ft. 0 in. (60 in.).
The 2001 Toyota Avalon has front wheel drive.
All the door speakers are 4' in size for replacement.
Both the front and rear are 4" door speakers, although it is not unheard of to fit 5.25" speakers in the front, and 6" in the back. Hope this helps!
JBL 8 inch. 3.7 ohm
The 2010 Toyota Avalon has 56.2 in. of rear hip room.
The 2011 Toyota Avalon has 56.2 in. of rear hip room.
The 2007 Toyota Avalon has 37.5 in. of rear head room.