MB Quart NK1120 Features: MARINE CERTIFIED Longer life against harsh conditions. Protected against sun fade with UVA paint coating. Conformal coated crossover components protect against fresh and salt water spray as well as dust and sand IPX67 Tested to the highest Marine and Motorsports standards for resisting the elements 1 PURE TITANIUM DOME TWEETER Very smooth musical response, high output with minimal required amplifier power WATER RESISTANT SPIDER Woven red aramid fiber composite spider to stabilize the cone and voice coil in all musical situations. Armid fibers do not degrade over time and are not susceptible to temperature swings 8 COMPOSITE POLY MIDRANGE UVA Protected, water resistant composite polypropylene cone with temperature stable Butyl rubber surround mounted on a lightweight composite frame HIGH TEMPERATURE VOICE COIL AND FORMER Voice coil is high t...