hey HAUNZ where u get your info??? I not startin a fight but since I personally disagree with your statement about chassis ground=3/0 where u get your info and facts on that??

how about everyone try this in their own vehicle... run wire to chasis and test what voltage drop and spl is, then run ground wire and do the same test... my guess is that with older cars, its better to run wire back to batt... as for me, i'll stick to my chasis ground cause it made no difference what so ever, plus i have less wire in the car

Hey if chassis ground works for you thats good. I just have not seen many loud SPL vehicles using chassis ground.

Amplifiers will also be more reliable if the ground connection amperage capacity is the same as the power wire.

Direct run to the battery on both power and ground for that extra bit on big power. Depending on your vehicles age, the rust in most vehicles frames/unibody would cause the higher power amps to pull a bit more current than they would had you run a power&ground wire.

So IMO if its an amp under 1000wrms just make sure you have a good chassis ground. Over 1000wrms run power and ground directly to battery and it doesn't hurt to ground it at the rear either for other components that you may have and to stop any possible ground loops from happening with the deck that may be grounded at the factory ground.

Richard Clark did some testing in response to some claims that a normal chassis ground return was equivalent to 4awg wire.... IIRC voltage drop was measured with 100 amps of DC current passing through the chassis and the closing comments were something like most American made chassis were equivalent to 3/0~4/0


Obviously with a wide variety of manufacturers and types of assembly you should take that with a grain of salt... as you Kia my not qualify... :ohwell:

thanks for your input. KIA LOL could be worse a yaris LOL^^

or the worst of all.....a NEON

The best answer in this thread.

OH - and HEY! I like my Neon :)

So if I'm running 4 guage to my amp, it's safe to run a ground all the way back to the battery as 4 guage as well?