I'm not too sure what you mean. All cars and trucks have a unique wire harness that plugs into the factory speaker's similar plugin harness. These Pioneers speakers only have two basic male pigtails. Which means that either you have to cut your wire harness in your car and add female pig tales, which is very messy, or you need to do a search for the proper adapter that adapts from your harness to these pioneer speakers. Copy this: << Metra 72-9300 Speaker Connector for Select Mazda/Nissan Vehicles >> Look at the product. Now, look that the big plastic end. Does that closely match your car's speaker wire harness? If it does, then this adapter is what you need!
it really depends on what you are working with from the beginning I had a Lexus GS 300 with a pioneer radio that had a little amp built in it and with that and the stock speakers that sound better. but I would say if you putthe speakers In You will probably get more Trimble then stock a little bit of base
I didn't buy the 6.5 inch speakers. I bought the 6x9s, but what I can say, from experience, is that Pioneer is known for being able to replace factory speakers with no modification needed. Ok, I did have to cut the connectors off of the wiring that went to the factory speakers, and splice in the included wiring for the Pioneers. Other than that, that was all that was needed. I put them in my Chrysler 300, and my car was designed by Mercedes Benz. They went right in with no space issues. I would be willing to guarantee that you won't have any problems at all.