Pioneer TS-F1034R 4" 2-Way Car Speakers Shallow Mount Subwoofers It is a passive 4-ohm

It is a passive 4-ohm subwoofer

These grilles are made specifically for Rockford Fosgate P1V2-675 and P2V2-675 speakers

With its 1/2 DIN format

This makes it a practical choice for upgrading factory-powered speakers or building a compact amplified system

Pioneer TS-F1034R 4" 2-Way Car Speakers Shallow Mount Subwoofers It is a passive 4-ohmThe Pioneer TS F1034R is a compact 4 inch, 2 way car speaker designed for replacing worn factory speakers or building a straightforward vehicle audio upgrade. Its 10 cm format is suited to locations where a larger speaker cannot be accommodated. The speaker uses a 4 ohm design for compatibility with common car audio speaker circuits. With 20 watts RMS power handling and 150 watts maximum music power, the TS F1034R is intended for modest power systems.