SeaKing Stores › 1in add-on tweeters - M2-TS - pair 1in add-on tweeters - M2-TS - pair £170.00 1in add-on tweeters - M2-TS - pair. M2-TS 1 inch marine add-on tweeter kit, sold as one pair. No RGB lighting. Sold as one pair of two speakers. Add To Cart Added! 1in add-on tweeters - M2-TS - pair. M2-TS 1 inch marine add-on tweeter kit, sold as one pair. No RGB lighting. Sold as one pair of two speakers.