RetroSound S-62 6.5 Inch Car Stereo Replacement Speakers - High Quality 2-Way Coaxial Audio System for Classic Cars & Trucks (Perfect for Door Panel or Rear Deck Installation)

Pros:- Lightweight- Low depth- Solid, clean soundCaveat, C900-specific:- The way 4" speakers are stock-mounted to the plastic grille inserts via 4 spring clips that attach to fragile plastic 'fins', their orientation required the use of creative rubber shims in lieu of the stock rubber "speaker gasket". Thinner shims for the two pins closer to the driver, thicker for the two forward.The notches in the frame of the speaker between the round portion and the square did require some selective placement of the aforemention spring clips.Worth the effort. The low depth of the speaker & especially the light weight will put a lot less strain on the clip attachments.