I have an 87 Range Rover and the only speakers you can fit in the stock holes are 4". I need some good speakers that will run off the head unit with minimal distortion. Also I was thinking about getting two 6x9s and can I wire the amp to power them in a series with my two subwoofer amps? or do they have to be in some way connected with the head unit other than the RCA outputs?
get one set of CDT CL-4x coaxials and one set of CL-4 midrange woofers. If you're adding in 6x9s, CL-69 midrange woofer to add some bass for the bottom end for you.