GP-2500.1 - Receiver Crunch - Free user manual and instructions
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| Product Type | Car Audio Monoblock Amplifier |
| Model | GP-2500.1 |
| Brand | Crunch |
| RMS Power Output (4 Ohm) | 800 Watts x 1 Channel |
| RMS Power Output (2 Ohm) | 1200 Watts x 1 Channel |
| Max Power Output | 2500 Watts |
| Frequency Response | 10 Hz - 250 Hz |
| Low Pass Filter | Variable 40 Hz - 250 Hz |
| Subsonic Filter | Variable 10 Hz - 40 Hz |
| Bass Boost | 0 - 12 dB |
| Input Sensitivity | 0.2 V - 6 V |
| Inputs | RCA Line Inputs (2-channel) |
| Speaker Outputs | Dual Subwoofer Outputs (positive/negative) |
| Protection Features | Thermal, Overload, Short Circuit |
| Power Supply | 12V DC (11-15V), Automotive |
| Fuse Rating | 100A (external fuse recommended) |
| Dimensions (L x W x H) | 12.2 x 7.8 x 2.1 inches (310 x 198 x 53 mm) |
| Weight | 4.8 lbs (2.2 kg) |
| Construction | Heatsink Aluminum Chassis |
| Warranty | 1 Year Limited |
Frequently Asked Questions - GP-2500.1 Crunch
What is the recommended impedance for the subwoofer?
The Crunch GP-2500.1 is stable down to 1 ohm, but for optimal performance and reliability, use a 2 ohm or 4 ohm load. At 1 ohm, ensure proper cooling and fuse rating.
How do I adjust the gain on the amplifier?
Set the gain using a multimeter or oscilloscope. With the head unit at 3/4 volume, adjust the gain until the output voltage matches the desired wattage (e.g., 40V for 800W at 2 ohms). Avoid clipping.
What size power wire do I need?
Use 4 AWG or larger power and ground wires for runs up to 15 feet. The amplifier draws up to 100A, so 4 AWG is recommended. Install a 100A fuse near the battery.
Can I bridge this amplifier?
The GP-2500.1 is a monoblock amplifier and cannot be bridged. It is designed for single subwoofer applications. Use multiple amplifiers for multiple subs.
How do I connect the remote turn-on wire?
Connect the remote terminal to a 12V+ source that turns on with the ignition, such as the head unit's remote output or a switched accessory wire.
What does the 'Protect' LED mean?
The Protect LED indicates a fault: short circuit, overheating, or low impedance. Check speaker connections, ensure proper ventilation, and verify impedance is within limits.
Can I use this amplifier with a factory head unit?
Yes, if the factory head unit has RCA outputs. If not, use a line output converter (LOC) to connect speaker-level inputs to the amplifier's RCA inputs.
What is the recommended fuse rating?
Use a 100A fuse on the main power wire within 12 inches of the battery. The amplifier does not have internal fuses.
How do I set the low-pass filter?
Set the low-pass filter to around 80 Hz for most subwoofers. Adjust according to your subwoofer's frequency response and personal preference.
Is the amplifier stable at 1 ohm?
Yes, the GP-2500.1 is 1 ohm stable, but ensure the amplifier has adequate cooling and the electrical system can handle the current draw. Use high-quality wiring.
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