First Carputer Install - Power/Grounding Questions

**CaptainTrap** · 02-27-2007, 04:26 PM

My setup is the following:

Audio
-Infinity 7541a Reference Series 111w RMS 4 Channel at 4ohms
-Infinity Kappa Perfect6.1 Components 100wRMS 4ohms
-Infinity Kappa 6x9mids 110w RMS 2ohms
(will running the mids at 2ohms and components at 4ohms be a problem?)

Carputer
-Carnetix P-2140 185w PSU
(w/ PV5 add-on for usb hub)
-Intel MacMini
-Lilliput 7inch Touch Screen

My questions are:

-I have a 4guage wire with dual 100wfuses (this unit)

(within 12inches of batt) running to a distro block that will feed the PSU and Amp. Is that fuse box sufficient enough?

Alternative Idea:
-Can I use the stock radio harness which contains 12v power, ignition,
and ground wires to connect to my P1240 or should i run it off the distro
block for power?

Thanks

**DarquePervert** · 02-27-2007, 05:37 PM

Do yourself a favor.
Wire the PSU to the battery, not the harness for the headunit.

**CaptainTrap** · 02-27-2007, 05:57 PM

grazi-

any ideas on if the fuse amperage is sufficient enough to cover both the audio system and carputer? Thanks

**CaptainTrap** · 02-27-2007, 06:13 PM

also what is everyones experience with grounding kits and carputer intsalls. I figure that by installing a grounding kit will give good clean quieter signals to the carputer.

If so are there any grounding kits you can suggest? Im driving a 1994 Acura Legend GS Sedan.

THANKS!

**david69leonard** · 02-27-2007, 06:38 PM

You can use the ignition wire from your HU, but that would be the only one that i would use. I would recommend connecting the the constant power wire to the battery a fuse and a distro-block and use a different grounding point other than the one your HU uses, that would help out alot when it comes to eliminating unwanted noises, just make sure it is a good clean ground. i had mine hooked up to the HU wire harness for over a year but after reevaluating the set-up i concluded it could cause alot of problems.

**CaptainTrap** · 02-28-2007, 07:06 PM

bump.........does anyone have any input to offer on the grounding kits??? thanks

**lxt_123** · 02-28-2007, 07:31 PM

Actually the fuse is related to the wire's gauge, in your case 4 gauge should have a 150 A fuse. The amplifier and the carputer are protected by their own fuses. The fuse on the 4 gauge wire protects the wire itself. In case of an accident or short circuit the power gets cut near the battery and the 4 gauge wire can not ignite the car.

**CaptainTrap** · 02-28-2007, 08:06 PM

oh, that is good to know. thank you

**CaptainTrap** · 02-28-2007, 08:16 PM

oh, that is good to know. thank you

**lxt_123** · 03-01-2007, 12:03 AM

you should have one 4 gauge wire connected to the battery, passing trough the firewall with a grommet than going into a distribution block. The amp and the carpc are connected to the distribution block. If you have the carpc near the amp, use another distribution block to connect both grounds into a common grounding point. If the amp is in the trunk and the carpc under the chair or in the dash, use 2 grounding points. Make sure you use a wire brush and clear the paint for the grounding point for a better contact. If you have more questions please feel free to pm me.