How many rear speakers are in a 95 Avalon?
there are two component speaker systems in the rear of the avalon. (1 in each door) the component system is a woofer and a tweeter. they have a cut out in the rear dash which will hold a 8 inch subwoofer.
some 92-95 civic hatchbacks had optional rear speakers factory installed, although not very many. it will be immediately apparent if your hatch has speakers in the back, you will notice the unmistakable grill/cover in the rear panel in the rear passenger deck. if it is not there, you can install the a rear speaker kit, which consists of mounting brackets, mounting bracket seals, and new/different panel covers with cutouts to allow the sound to exit the panels unimpeded. perhaps this link will be helpful. http://www.hondaautomotiveparts.com/instal/aii/pages/civic/1995/16602_01.html
Remove the cartpet moldings by the second row seats. You will have to remove the covers off the seat belt holders behind the seats, remove the rear roof console above the back window. The entire section is snapped into place where the speakers are. Start by putting your hand behind the panel near the second row seating and working your way to the rear of the vehicle. Kind of a pain but was easy as well. The whole panel will come off. Repeat for other side. Unless modifications are done you will only get 6" round speakers in rear. 6x9 speakers will not work unless modified.
Late model? I replaced the Bose rear speakers in my 95 Eldorado - not fun. You have to take the back seat out (both parts - bolts through to the trunk and down by the seatbelts), remove the package tray cover (fuzzy part between the rear seat and rear window), and yes, it's glued down... Use a long flat screwdriver so something similar to pry it apart without destroying it. You should have unplugged the speakers while you were in the trunk. Now you should be able to see that the speakers actually snap into place, and you'll have to carefully pry them out of two fasteners that hold them down.
Dodge spirit and Plymouth Acclaims use 5 1/4" speakers in front and rear doors. The covers pry off if done gently. The have plastic tabs holding them on. They get brittle so be careful. Just unscrew and install new speakers and snap on the covers. They sell kits a Walmart and other stores if needed for the speakers. I'm getting ready to replace the door speakers in my 94 Dodge Spirit.
Don't waste your time replacing those inferior 4 X 6 one way speakers. If you pull out the two cargo compartments under each rear window, you can find the wires. Get a wiring diagram and cut the wires going to each speaker and put a good set of 6 X 9 3-way speakers in boxes under your rear seat. I did this to both my '95 and '97 Silverado and love the sound without compromising any leg or storage room.
you will have to pull the door panel off to access the speaker. the 95 millenia has a premium sound system so be careful. It may have 2 ohm speakers in there and if you replace them with 4 ohm speakers, you will get alot less power from the system and it will not sound as good. your best bet is to bypass the factory amp and wire the new speakers right to an aftermarket head unit.