GP690 - Uncategorized Crunch - Free user manual and instructions
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| Product Type | Car Audio Amplifier |
| Brand | Crunch |
| Model | GP690 |
| Number of Channels | 6 |
| RMS Power (4 Ohms) | 90 W x 6 |
| RMS Power (2 Ohms) | 135 W x 6 |
| Bridged Power (4 Ohms) | 270 W x 3 |
| Frequency Response | 20 Hz – 20 kHz |
| Signal-to-Noise Ratio | 95 dB |
| Total Harmonic Distortion | <0.1% |
| Input Sensitivity | 200 mV – 6 V |
| Low Pass Filter | 50 Hz – 250 Hz |
| High Pass Filter | 50 Hz – 250 Hz |
| Bass Boost | 0 – 18 dB |
| Dimensions (L x W x H) | 14.5 x 7.5 x 2.1 inches |
| Weight | 6.8 lbs |
| Power Supply Voltage | 12 V DC (10 – 16 V) |
| Fuse Rating | 30 A x 3 |
| Cooling | Convection |
| Protection Circuits | Thermal, Overload, Short Circuit |
| Construction | Aluminum heatsink |
| Remote Turn-On | Yes |
| Compatibility | 2 Ohm stable stereo, 4 Ohm bridged |
Frequently Asked Questions - GP690 Crunch
What is the recommended speaker impedance for the GP690?
The GP690 is stable down to 2 ohms per channel in stereo mode and 4 ohms when bridged. For optimal performance, use speakers with an impedance of 4 ohms or higher.
How do I wire the amplifier for bridged mode?
To bridge channels, use the left and right RCA inputs for the pair, and connect the positive speaker terminal of the left channel and the negative of the right channel to the speaker. Refer to the manual for specific channel pairing.
What size power wire should I use?
Use 4 AWG power and ground wire for the main connection. The amplifier's total current draw is up to 90A, so ensure your wiring and fuse are rated accordingly.
Can the GP690 be used with a factory head unit?
Yes, but you may need a line output converter (LOC) if the factory radio does not have preamp outputs. The amplifier's input sensitivity can be adjusted from 200mV to 6V.
How do I set the gain correctly?
Set the head unit volume to about 75% of maximum, then adjust the gain until you hear distortion, then back off slightly. Use a multimeter to set voltages correctly for your target power.
What is the purpose of the bass boost?
The bass boost function increases low-frequency output by up to 18 dB at 45 Hz. Use it sparingly to avoid distortion or damage to speakers.
Does the amplifier come with a remote subwoofer control?
The GP690 includes a remote bass level control that can be mounted within reach of the driver for convenient bass adjustment.
How do I connect multiple amplifiers?
You can daisy-chain multiple GP690 amplifiers using RCA outputs or a distribution block. Ensure the total load on the electrical system is within limits.
What fuses are required?
The amplifier has three 30A fuses. Use a main fuse of at least 90A near the battery, and ensure all fuses are ATC/ATO type.
Is the GP690 protected against overheating?
Yes, the amplifier features thermal protection that will shut it down if it exceeds safe operating temperatures. Ensure adequate ventilation around the heatsink.
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USER MANUAL GP690 Crunch
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Product information
Brand : Crunch
Model : GP690
Category : Uncategorized