You will most likely need to upgrade the stock charging system to generate 1000 Watts in a Celica. Ohms law: 1000 Watts / 12.5V = 80 Amps.
If you want to maintain fader control, go with one of these: e4300 300/4
If you don't use the fader often, you can go with these: e2150 300/2
PM me with any questions you may have about JL Audio products.