Replacing HU and door speakers

justsomeguy

Well bro, This is my setup!

My amp is Precision Power PPI 900.4 (900watt 4 channels)- it's the phantom series so it's really small and easy to tuck! I placed it between the spare tire and behind the brace(?) bar that's behind the seats under the styrofoam to keep it hidden. Got a 4gauge amp kit with that.

My door speakers:
Since I am not an audiophile but still wanted sound quality bettter than base.. my friend recommended me to get Alpine SPR- 60c. They are component speakers and hearing them in person before having them installed i fell in love with them because I am a clarity over loudness guy! Although they may not have as much bass as other speakers, that's why ill get to the sub.

My Sub.
I am using an old solo baric l5 and the zenclosure box. I have it wired to take up the other 2 channels I didn't use on my amp (the each component of the door speakers using 1 channel) and that alone provides more than enough bass I'll ever need. Considering the Z is a small car interior wise, I figured I didn't really need rear speakers.

To answer your original question:

No, you wouldn't need an amp to run both the HU and the door speakers, but if you don't have one, your speakers may be underpowered and may not be getting the amount of signal it needs from the HU to produce what they were made for

Good luck!