These are quality speaker cabinets. The opening is actually 6.5 inches wide, which is way too big for a 6.5-inch speaker. I modified them to accommodate 6.5" JL Audio speakers. They will fit JL Audio 7.5 inch speakers without modification, but larger speakers will not fit under my boat's gunwale. The customer service from this seller was excellent. The only reason I gave them four stars instead of five is because they don't fit 6.5 inch speakers as advertised.
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