mihai wrote:Only problem will be that you wont be able to cut the bass from the door speakers so that will let you down at higher volumes.
have a look here.
There is a REALLY easy way around this, passive crossover...
http://www.bcae1.com/passxovr.htmYou can buy the capacitors/inductors needed from jaycar electronics and then just solder them into place as is, usually this system will give you -6dB/octave roll off... you can use a cap and inductor at the same time to create a bandpass (only allows freq at a specific range through) as well or you can just get aftermarket speakers with their own crossover like I did and then add a highpass filter to the input to stop all bass feq comming through... Hope this helps
P.S. I recommend setting around 80Hz - 100Hz as a crossover point. Most subs don't like going over 80, most 6.5" woofers don't like going under. Also keep in mind that you will get a 3db Spike at the crossover point, a way to avoid this is to set your crossover points slightly different (roll your speakers off at 85hz and your sub off at 75hz) or if your like me and happen to like that freq being boosted a bit, just set both at 80. Also remember to use parts rated at the power level your running.