Maxxsonics MB Quart RS1-213 Reference Series 5.25" Component SpeakersMB Quart RS1 213 Reference Series 5. 25" Component Speakers 2 way component speaker system designed for car audio Features a 5. 25 inch composite polypropylene cone woofer and a 1 inch titanium dome tweeter Has a power handling of 100 watts RMS and 200 watts peak power Impedance of 4 ohms and sensitivity of 89 dB Item Number: RS1 213 Dimensions: 19. 0 x 7. 0 x 3. 0 inches Weight: 4. 15 lb Found in 2001 by Alden Stiefel and a handful of consumer