from big mike

Plastic speaker weak can't take a bump if located low in the boat.

from David1

Speakers sound good but the covers are really weak. One good bump and they crack wide open. From what I can tell you cannot just replace the cover either. You have to buy a whole new speaker.

from top sail

not durable. after several summers, I bumped grill cover and grill cover shattered. I was not worried until I realized I would have to replace the entire speaker. sound is fine. I am not happy!!

from RODSMITH

IN 2 SHORT SEASONS ON MY BOAT THE GRILL COVERS POWDER IN MY HANDS. NO GRILL REPLACEMENT AVAIL WITH THE TWEETER INTEGRAL TO THE GRILL AND MUST REPLACE ENTIRE SPEAKER, OR IN MY CASE ALL 4. INTENDED TO TAKE SPKRS AND MAKE ENCLOSURES FOR GARAGE BUT ALSO NOTED THAT 1 OF THE SPEAKERS HAD A NASTY BUZZ...

from Ram2325

I have 4 JBL 6510 speaker covers have become so brittle that they shatter. Speakers sound okay, but the material is poor quality. I should not have to buy another pair just for the covers.. Disappointed!!