I have installed Helix C63C 3 way speakers in front and C62C 2 way component speakers in the rear. The HU I have now is a Kenwood DDX9017S and Helix P6 amplifier. I had a Subwoofer in trunk but removed it. I might install a spare wheel type active subwoofer later. I dont like traveling with a box in trunk. Tweeters and mids fit in the dash area. You will make small modifications under the grill, nothing visible though.