Image Dynamics CTX65CS under HU power

Here is the link to the remote power on if you want to go that way. The best thing to do is find an old harness from a junk yard and take one of the pins out to use in your wiring harness. http://www.tacomaworld.com/forum/au...ing-pdx-5-under-drivers-seat.html#post1565963

My advice is first buy the speakers you want and install them. See what they sound like without an additional amp. This will keep your factory system in place and you have the steering wheel remote still. It also may be just enough power for the small cab.

If you are looking to use an amp, I unfortunately do recommend a new HU only due to the bass boost I mentioned before as it drives me crazy at times. The alternative is to wire your own pre-amp outputs but since I don't know the circuitry I can't say for certain that there is a spot to tap that. If you want a new HU you need to do your homework on the mounting frames and if you will be able to use the steering wheel controls. For some folks it's not a big deal but I'm use to these things and would hate to give them up.

I hope this helps.

-Joe