METRA 82-SU1 speaker adapter and wire harness kit 6.5-6.75 in car electronics accessory
- Speaker Spacers
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Rockford Fosgate
3.5-inch two-way coaxial speakers with 20 W RMS power handling and 85 dB sensitivity
The Rockford Fosgate Punch P1 3.5" 2-way coaxial speaker fits factory locations that accept a three-and-a-half-inch driver. It is built for drivers who want a direct replacement with a mineral-filled polypropylene cone, butyl rubber surround and PEI dome tweeter. The ICC crossover is integrated for a tidy install. Buyers needing deeper bass extension or higher power handling should look elsewhere.
Before ordering, confirm that your door or dash opening matches a 3.5" cutout and that the mounting depth clears the speaker frame and integrated crossover. The nominal impedance is 4 ohms, so check that your head unit or amplifier is stable at that load. Sensitivity is rated at 85 dB, meaning modest amplifier power will produce adequate volume. Ensure wiring polarity is observed for correct phase.
Under continuous operation each speaker handles 20 watts RMS, while the pair handles 40 watts RMS. The polypropylene cone and butyl surround maintain compliance during extended play, and the VAST surround geometry adds up to 25 percent more cone area for consistent output. Peak power is 80 watts per pair for brief transients. Thermal limits are governed by the 20-watt RMS rating, so prolonged high-level signals stay within that envelope.
| Brand | Rockford Fosgate |
|---|---|
| Series | Punch P1 |
| Type | 2-way Speaker |
| Speaker Size | 3.5" |
| Woofer Material | Polypropylene |
| Peak Power | 80 Watts |
| RMS Power | 20 W |
| Sensitivity | 85 dB |
| Frequency Response | 120 Hz |
| Impedance | 4 Ohm |
The package contains two 3.5-inch Punch P1 coaxial speakers with built-in ICC crossovers, PEI dome tweeters, and VAST surrounds; speaker wire, mounting hardware, and an amplifier are not included.
Each speaker handles 20 watts RMS and 40 watts peak at 4 ohms, so a typical 20-watt-per-channel head unit will drive them cleanly, while an external amp up to 40 watts RMS per channel adds headroom.
The 120 Hz lower limit means the woofers reproduce mid-bass down to that point; frequencies below 120 Hz will require a subwoofer or larger mid-bass drivers.
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