I currently have a '95 Toyota Corolla equipped with four speakers; (2) 4" Pyle 180W 2-way speakers in the front doors and (2) 5.25" Pyle 200W 3-way speakers on the rear deck. I just finished putting these in along with a new head unit. I'm happy with the head unit, but feel as though my speakers lack the power I'm looking for. I noticed through the inside of my trunk that while the felt dash seen from the back seat does not have holes for 6" x 9" speakers, the metal support underneath it does. I am now considering cutting into the felt dash and installing exposed (2) 6" x 9" 300W 3-way speakers. I'm not looking to get a sub, so I see 2 potential upgrade options that I'd consider:
1) -Removing the 4" speakers from the front doors
-Moving the 5.25" speakers from the rear up to the front doors
-Installing (2) 6" x 9" speakers in the back in place of the 5.25" speakers
2) -Re-wiring the back speakers to allow for (2) 5.25" speakers AND (2) 6" x 9" speakers*
-Leaving the 4" speakers in the front doors
*I would wire the car's rear right ground wire to the - terminal of the right 5.25", the + terminal of the 5.25" would connect to the - terminal of the 6" x 9", and then the + terminal of the 6" x 9" would connect to the car's rear right hot/ live wire. I would then mirror this with the left rear speakers. SOMEONE PLEASE CONFIRM OR REFUTE THIS AS A POSSIBILITY!!
Option 1 seem like it would lead to a more balanced sound but in comparison to option 2, the system would not be as powerful.
Option 2 concerns me with the balance; having only about 25 square inches of speaker in the front while having approximately 141 square inches of speaker in the back would result in an 8db difference in sound at 75% volume.
A friend of mine has (2) stock 6" in the front doors and (2) stock 6" x 9" in the back and has, what I would consider, a decent amount of power. I'm looking to get a comparable set up to his; if not better. Would option 2 allow me to do so or would I have to sacrifice the power of the rear (4) speakers to maintain a proper balance throughout the car?