I'm a motorcycle mechanic and someone was bitching to me about crimp connectors being crap, so we broke out the multimeters and did some tests. With a good crimping tool and proper use, the result was so negligible I doubt you would ever notice.
Just don't use the crappy 3m splice connectors because they really do damage the wires
![Image](http://www.midterminc.com/media/5602.gif)
just use a butt splice connector like this
or this
![Laughing :lol:](./images/smilies/icon_lol.gif)
![Image](http://www.horrorphile.net/images/the-human-centipede-diagram1.jpg)