6x9's into stock alpine system

[lx5.0]

is it possible to upgrade the rear 6x8 woofers to 6x9 in the box and also will the factory amp handle them, how many watts are the stock rear woofers

 

[Alexbougie]

Rear subwoofer are 6x9 and 85 Watt for the factory amp if I'm right

 

[Outkast]

but theyare on a low pass cross over from the factory...you need to find replacement subwoofer if you are looking to upgrade...and they cost $$

 

[BrianDye]

Yea the amp will have a LPF meaning that only bass gets hrough so if you want like acutal speakers back there you'll have to bypass the amp, you'd really be btter off getting a new headunit too, and door speakers which are 6x8's