Re: going active...? tweeter suggestions?
You need a four channel with on board active controls and hopefully bandpassable channels for the mids, or a high pass filter on your deck. Either that or an external crossover. As for tweets, im pretty sure the XXXs dont like to be played over 2K, atleast not well, so look for something large that will play down to around 2-2.5k depending on personal preference.
Edit; Thats just to get you STARTED, ideally you want a crossover with adjustable slopes to find what you want...
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