1. Mid-woofer hi-fi speaker 2. Frequency response: 44-7kHz 3. Foam surround, helpful for pure sound 4. Aluminium basket Features:1. Glassfiber cone is ideal for a pure, crisp, and nice sound yellow , black and silver are ok. 2. Aluminium basket , nice-looking 3. 4"/5"/6.5" are all Ok. 4. Foam surround is very good for nice midrange sound. We can make changes based on your requirement. Brief ...