1999 jeep grand cherokee stereo/power draw questions

[spielightdude]

Hi everyone,

I have a 1999 jeep grand cherokee limited with the factory infinity amp and speakers with a custom dvd/flipout screen head unit.
Overall the sound for now is ok but I am looking to add a small 10" sub in a sealed box. My question is since my batt. gauge is usually just a little bit below the center 14 volt mark I am wondering if I were to add a 200-300 watt max small monoblock amp to power the sub would I need to upgrade my alternator or is there still enough power in the stock unit to add that?

I have the limited model so I already have alot of factory electric goodies so that is my main concern, Or would I just be better off going with a 5-6 channel amp and replace the factory amp and speakers and either bridge the last 2 channels of a 6 channel amp or use the 5th channel of a 5 channel amp for the sub and still replace the factory speakers all the way around?

Thanks,

Joe

[96spyderman]

I had a 300W amp with a 12" hooked up and had no problems with power loss.
Headlights and fogs barely dimmed when the sub was pounding.



I just tapped off the factory amps output to the rear speakers for the amp input(factory head unit no outputs) Amp power straight to the battery, grounded to frame.

Worked great.

[kahjdh]

Did you tap in before or after the amp? Also where did you connect the remote wire?