Use that amp now for passive. When you go 3 way, buy another 4 channel amp. Because the tweeter and the MIdbass go on the same amp. You would use the 2 channel for the midrange. The 8455 is an awesome choice. I have the same deck by the way.I think what I'll do is work my way to an active setup...but for now do passive. and with my 125x2 I should be able to get alot of juice to the mid.
only question is...how I'm going to mount a 3 way set into my door.....
the stock speaker is a 6x9...so I should have a nice big hole to work with. Could use some MDF board and make an adapter to fit the 6 1/2 and the 3 inch mid...and hopefully squeeze in the tweeter. But...I would really like to some how angle the tweeter and the 3 inch mid up towards the dome light...don't know how I do that.
