Previously: Basic Car Audio Upgrades, Honda Civic Part 1
Welcome to Part 2 of Basic Car Audio Upgrades. We’re back to work on the 2008 Honda Civic EX. This time I’m adding a 4-channel amplifier and replacing the rear speakers. I’m also running wires to the trunk for a future addition of a powered subwoofer. I will also be using the new speaker adapters made by car-speaker-adapters.com to help get this product to market. Speaker adapters help out when the factory speaker isn’t mounted straight to the panel the way an aftermarket speaker gets mounted.
The amplifier chosen for this upgrade was the Precision Power Phantom P900.4. This is our best selling amplifier. I will be mounting it under the passenger seat. It’s small enough to fit within the footprint of the base of the seat and it provides quite a bit of power without placing a heavy load on the alternator.
Power is brought into the cabin with 4 gauge cable from a dB Link CK4Z amplifier installation kit. This kit features a wafer style ANL fuse, 17 feet of Superflex Soft Touch power cable, 3 feet of ground cable, 25 feet of 16 gauge speaker wire, and more. I used a pair of 6 foot 2-channel RCA cables by Tsunami, part number RTP950-6.
The original system plan included a pair of CDT Audio ES-6CFX 6.5″ speakers. In the Alpha Damp photo those are the speakers shown. They didn’t work out as this particular car had a clearance issue that would have required cutting of the sheet metal. This wasn’t an option for this car.
I finished the sound deadening for the rear deck lid by hot gluing some closed cell foam to the underside of the cover. This puts a barrier between plastic and metal to prevent vibrations from the new speakers and the subwoofer that is coming soon.
The car will be coming back to get the front speakers replaced. With new speakers in the back and more power for the front speakers the sound is greatly improved. There’s a welcome addition of clear treble from the JBLs plus the stock speakers in the front doors are finally showing signs of life. The extra power really gets the door panels vibrating. That will be addressed with Alpha Damp and possibly other products.