Re: Advice on component selection
Need a budget. Are you running or plan on running a sub at all? We can give speaker recommendations all day. However, without a budget and knowing if you are going passive or active it makes it difficult.
Are your door's deadened at all right now? Did you decouple the ND8 driver's from the door?
You will need a external x-over if you run a 3-way up-front active + sub set-up. If you run the 4.5" and tweeter passive then you can use the HU for the sub and 8". You maybe able to get away with not having to run an external x-over active if your amp has built x-overs.
There are not alot of 4" or 4.5" passive drop-in comp sets on the market. So this will limit your options. If you go active it opens more options than I could list.
If you do a 3-way front + sub rear fill is up to you. I don't prefer it myself.
This is a good little article that will help you understand the phase plug.
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