(4) Rockford Fosgate P1694 600 Watt 6x9" Punch Series 4-Way Car Audio Speakers - FlexFit basket design - OEM adapter plate included-PEI dome tweeter-Butyl midrange rubber surround P1694 is the best sounding speaker to certainly benefit from this Punch series full-range speaker. This model possesses a Flex Fit basket to ensure compatibility with odd shaped factory speaker locations and an ICC- Integrated Concealed Crossover, eliminating the need to mount any black boxes. P1694 is the best sounding speaker to certainly benefit from this Punch series full-range speaker. This model possesses a Flex Fit basket to ensure compatibility with odd shaped factory speaker locations and an ICC- Integrated Concealed Crossover, eliminating the need to mount any black boxes. Rockford Fosgate P1694 FlexFit basket design OEM adapter plate included PEI dome tweeter Butyl midrange rubber surround Injection molded mineral filled polypropylene cone Technical Details: Rockford Fosgate P1694 Nominal Impedance: 4-Ohm Midrange Size: 6x9" Speaker Type: 4-Way Coax Crossover: n/a - tweeter has built-in crossover Sensitivity: 90 dB Frequency response: 40-21,000 Hz Midrange Mounting Depth: 3.07" Tweeter Size: 0.75" Mounting Hardware: Yes