Pioneer TS-R1651S-2 car speakers.
Here's information about these speakers for shopping:
Model: Pioneer TS-R1651S-2 (also referred to as TS-R1651S).
Type: 16 cm (6.5 inch) 3-Way Car Audio Speakers.
Power: 300W Maximum Music Power (40W Nominal).
Features: High Sensitivity, designed for improved sound performance, and features an Injected Molded Polypropylene (IMPP) composite cone woofer for enhanced sensitivity and reduced distortion.