PSP4 - Subwoofer Metra - Free user manual and instructions
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| Product Type | Subwoofer enclosure |
| Brand | Metra |
| Model | PSP4 |
| Speaker Size | 4 inches |
| Impedance | 4 ohms |
| RMS Power Handling | 40 watts |
| Peak Power Handling | 80 watts |
| Frequency Response | 55 Hz - 250 Hz |
| Sensitivity | 88 dB |
| Enclosure Type | Sealed compact box |
| Mounting Depth | 2.5 inches |
| Dimensions (W x H x D) | 8 x 8 x 7 inches |
| Weight | 2.8 lbs |
| Connection Type | Spring-loaded terminals |
| Installation | Surface mount with included brackets |
| Maintenance | Clean with soft dry cloth; do not use liquids |
| Safety Notes | Disconnect power before wiring; secure enclosure firmly |
| Spare Parts and Repairability | Replaceable grille and terminal cup; serviceable by qualified technician |
| Warranty | 1-year limited warranty |
| Compatibility | Works with most car audio head units and amplifiers |
Frequently Asked Questions - PSP4 Metra
How do I connect the Metra PSP4 subwoofer to my car stereo?
Use the spring-loaded terminals on the enclosure. Connect the positive lead from your amplifier to the positive (+) terminal and the negative lead to the negative (-) terminal. Ensure the amplifier crossover is set to low-pass around 150 Hz.
What amplifier power is recommended for the PSP4?
The PSP4 handles 40 watts RMS and 80 watts peak. An amplifier delivering 30–50 watts RMS into a 4-ohm load is ideal.
Can I use the PSP4 in a home theater system?
Yes, it can be used with a mini amplifier or home receiver that supports 4-ohm speakers. Place it away from walls for best bass response.
What size enclosure is the PSP4? Is it ported or sealed?
It is a compact sealed enclosure with a 4-inch driver, designed to save space in vehicles while delivering tight bass.
How do I break in the new subwoofer?
Play music at moderate volume for about 10 hours. This helps the speaker suspension loosen and improves low-frequency performance.
How do I clean and maintain the subwoofer grille?
Gently wipe the grille with a soft, dry cloth. Avoid water or cleaning sprays, as liquid can damage the cone material and electronics.
Is the PSP4 compatible with factory car radios?
In most cases yes, but you will need an amplifier or a line-output converter if the factory radio has no preamp outputs.
What is the warranty on the Metra PSP4?
Metra provides a 1-year limited warranty against defects in materials and workmanship. Keep your receipt for service claims.
Can I replace the speaker in the PSP4 enclosure if it is damaged?
The driver can be replaced by a qualified technician. Use a 4-inch subwoofer with the same impedance and power rating to maintain performance.
How do I avoid distortion when using the PSP4 at high volume?
Set the gain on your amplifier correctly and avoid turning the head unit volume past its sweet spot. Excessive clipping can damage the voice coil.
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