Sold as a pair, the REF407F set delivers crisp mids and punchy sound in a compact 4″ size. Built with Infinity’s Plus One™ polypropylene woofer cone and hi-roll rubber surround, plus a textile ½″ balanced-dome tweeter, this pair upgrades factory speakers with clean, efficient power and clarity.
Key Features
- Sold as a pair (2 speakers)
- Power Handling (RMS): 35 W Each / 70 W Per Pair
- Power Handling (Peak): 105 W Each / 210 W Per Pair
- Impedance: 3 Ω (True Four Ohm Impedance Technology)
- Sensitivity: 92 dB @ 2.83 V/1 m
- Frequency Response: 75 Hz – 21,000 Hz
- Plus One™ polypropylene woofer cone with hi-roll rubber surround
- ½″ textile balanced-dome tweeter
- Mounting Depth (Top): ~1-7/8″
- Cutout Diameter: ~3-11/16″