GP820 - Subwoofer Crunch - Free user manual and instructions
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| Brand | Crunch |
| Model | GP820 |
| Product Type | Car Audio Subwoofer |
| Size | 8 inches |
| Impedance | 4 ohms (single voice coil) |
| Power Handling (RMS) | 400 Watts |
| Power Handling (Peak) | 800 Watts |
| Frequency Response | 30 Hz - 500 Hz |
| Sensitivity | 90 dB (1W/1m) |
| Mounting Depth | 5.2 inches (132 mm) |
| Cutout Diameter | 7.25 inches (184 mm) |
| Recommended Enclosure | Sealed: 0.5-0.8 cu ft; Ported: 1.0-1.5 cu ft |
| Voice Coil | Single 4-ohm, 2-inch diameter |
| Cone Material | Polypropylene with rubber surround |
| Magnet Weight | 60 oz (1.7 kg) |
| Terminals | Push-type spring terminals |
| Weight | 10.5 lbs (4.8 kg) |
| Warranty | 1 year limited |
Frequently Asked Questions - GP820 Crunch
What is the power handling of the Crunch GP820?
The GP820 handles 400 Watts RMS and 800 Watts peak.
What is the impedance of the GP820?
It has a single 4-ohm voice coil.
What size enclosure does the GP820 need?
For a sealed box, use 0.5 to 0.8 cubic feet. For a ported box, use 1.0 to 1.5 cubic feet tuned to 35 Hz.
What is the mounting depth of the Crunch GP820?
The mounting depth is 5.2 inches (132 mm).
How do I wire multiple GP820 subwoofers?
Since each sub has a single 4-ohm voice coil, you can wire two subs in parallel for a 2-ohm load or in series for an 8-ohm load.
What amplifier is recommended for the GP820?
Use an amplifier that delivers 300-500 Watts RMS at the final impedance load (e.g., 400W x 1 at 4 ohms or 2 ohms).
Does the GP820 require a break-in period?
Yes, it is recommended to play the sub at low to moderate volume for about 10-20 hours before pushing it to maximum power.
What is the frequency response of the GP820?
The frequency response is 30 Hz to 500 Hz.
How do I set the gain on my amplifier for the GP820?
Set the gain using a multimeter or oscilloscope to match the amplifier's output to the sub's RMS rating. Start with gain low and increase until distortion is heard, then back off slightly.
Can I use the GP820 in a home theater system?
Yes, but you will need a car audio amplifier with a power supply, as it is designed for 12V systems.
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USER MANUAL GP820 Crunch
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Product information
Brand : Crunch
Model : GP820
Category : Subwoofer