Metra 70-1727 Amplifier Bypass Harness for 2006 Honda Civic | Metra 40-HD10 Antenna Adapter for Honda/Acura Aftermarket Radio Installation | Car Audio Upgrade Solution

I bought a "plug and play" Android head unit kit for my 2009 Honda Civic. As expected, because my Civic is EX with premium sound, no sound played. (You know you have premium sound with factory amp because "Premium Sound System" is printed on the front of the radio.) Before this kit, I tried tapped the wire that turns on the factory amp, tying it to the amp turn on on the new radio. Alas, as expected, sound worked, but it was amplifying already amplified sound and sound was distorted above "volume 4". So in came this kit, did the normal soldering of connections to the harness, bypassed the factory amp and everything works as expected. As others mentioned, came with excessive cables - now I have some for other projects. To get to the amp, I just popped out the panels under my manual shifter, unplugged the cable, leaving the amp in place and plugged this in - easy. I didn't need to unfasten or move the center console stuff between the seats. :-) A few notes, you will lose your factory sub and the front tweeters as these signal chains are processed in the factory amp. I purchased aftermarket speakers with tweeters and an aftermarket sub, to make up for those frequencies in the music so this wasn't an issue for me. If you are trying to use your stock speakers, I think Metra or Scosche has an RCA to Honda stock amp kit, you would run RCA out of your radio and then splice into the stock amp. That would be a better option than this with stock speakers, as sound is all muddy midrange with no highs or lows - unless you replace with aftermarket speakers as I did.