JL Audio M6 Series 7.7" Speakers (white) M6-880X-S-GwGwThe same principle that makes our 7. 7 inch marine speakers dominate over conventional 6. 5 inch designs is delivered in a more powerful dose in our M6 880X 8. 8 inch coaxial. These 8. 8 inch diameter monsters offer significant performance advantages over our 7. 7 inch models, and a huge advantage over conventional 6. 5 inch marine coaxial. Thanks to 36% more cone area and almost double the excursion capability, the M6 880X's are capable of +6 dB