Head unit power - cig. lighter or from battery?

[luckyNot]

Hi,
Hello everyone :wave

I have an uprated head unit in RX7 FD3. Normal power for head unit is 3amps I believe. I want to uprate this to 10amp. Earth cable replaced with 10 amp cable, but Live+  I am not sure about.

From wiring diagrams it appears I could run this off the back of the cigarette lighter (30amp). I investigated this and the previous owner had disconnected the cigarette lighter, I have found what I believe to be connector (it is an unusual shape), but the wires coming from it cant be rated above 5 amp. How have other people solved this?  

On other cars I have run a new lead direct from the battery, but the engine bay and chassis are so tight on the RX7 I cannot see any way of doing this.

Any ideas or stickies or YouTube? I have run a number of FAQ queries and cannot find this.

[probedb]

The audio loom fuse is 10A.

I\'ve run several different head units in my car and all I\'ve done is wire an ISO loom in to replace the stock one.

[luckyNot]

Really? The standard loom power cable does not look like a 10A cable. I wired in to the standard loom to start with but when I turned up the headunit on anything with a bass line you could see the power fade on the headunit with each beat. I put in a clean earth (I think) to see if that would help, but no joy there either.

Given you have had no issue, I must have missed something. Thank you for replying.

[shaunwil]

If it has a removable face just wire in some fresh cable from the battery with a fuse at the battery end. I\'ve always liked giving it a decent supply.

If its not then put a relay in and use the cig lighter loom as a switch on for the ignition side of the power.

Shaun

[probedb]

Yes, the fuse is definitely 10A It\'s not to say all wiring is even and that someone hasn\'t messed with yours at some point but I\'ve never had an issue.