Infinity BassLink Install Questions

Pyroboy

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2009 Mazda5 GT Luxury
I have the back of my '09 GT apart to connect my Infinity BassLink. I was hoping someone could answer a few questions for me:

-Rear speaker wire polarity
Does anyone have a wiring diagram or know what colours are the + and - for the speakers on the left and right rear? There are no markings on the speaker terminals or the wires and I assume the BassLink needs to connected with the right polarity.
Okay, I found the online manual and got that part figured out.

-Power source
The BassLink install instructions call for a 12 ga. wire with a 20 A fuse to the battery. I was going to run it off the rear power outlet but it's only rated at 120 W (assuming that's 10 A at 12 V) and the connecting wire is really small. I may use it to test the install but I need a better power source. Any suggestions inside the cabin? Can I connect power it from the fuse panel in the dash by the right-front door?

Thanks for the help!

BTW, I just got the BassLink in 4 days from Amazon.com for $180 after waiting for 4 weeks for Dealer Cost Car Audio to ship, and finally cancelling the order.
 
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You need an amp wiring kit like this:
http://www.crutchfield.com/s_142PA10/EFX-10-gauge-Amplifier-Wiring-Kit.html?tp=2919
THe positive goes right to the battery, and the ground will connect to your chassis. You will need to keep the ground cable as short as possible, so chose a spot close to a solid bolt. Running the positive cable is one of the hardest parts. I just installed another amp today...
You need to figure out a way to get the cable through the firewall. If you have an automatic trans, there is a plastic plug where the clutch would go that makes a good pass through, but it is hard to access from the engine bay. I removed mine from the inside and then fed the cable down on the engine side and then fished the cable through the hole from the inside. Then I ran my cables under the carpet. One goes to my passenger seat, so the cable goes under the center console. The other goes to the big amp in the trunk, so it runs under the door sill plates.

Lots of good guides on Crutchfield.
http://www.crutchfield.com/learn/learningcenter/car/amplifier_installation_guide.html
 
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BassLink Install

Thanks for the info.! I got everything working using the power outlet in the left rear and it cranks out way more bass than I need so I'm going to leave it like that for now. If I ever blow the 15 A fuse for the outlet then I'll consider running a dedicated feed from the battery or main fuse panel.
 
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