I bought the speakers 3 years ago. The only "new" equipment I have are the jl amps and sub. A lot of people like the db series and plus they have an rms rating of 100 which is decent.
I have an older model alpine HU. 9813. This is what I have for connection on the HU. Connector Type 1.0 x Rear channel output ( RCA phono x 2 ) , 1.0 x Subwoofer output ( RCA phono x 2 ) , 1.0 x Front channel output ( RCA phono x 2 )