The Hertz Cento CPK690 is a 6×9 component speaker system featuring an elliptical pressed paper woofer designed for door mounting. The large emission area improves efficiency and extends the low-frequency response to 35 Hz while an upgraded magnetic group and voice coil increase power handling and lower resonance for controlled output.

The included passive crossover uses selected components with a 6 dB/octave low-pass on the woofer and a 12 dB/octave high-pass for the tweeter with three levels of attenuation. The system is optimized for common North American 6×9 door placements and requires appropriate mounting depth and wiring for correct installation.