DR-3725.1D - Receiver Crunch - Free user manual and instructions
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| Product Type | Car Audio Monoblock Amplifier |
| Brand | Crunch |
| Model | DR-3725.1D |
| Amplifier Class | Class D |
| Number of Channels | 1 (Monoblock) |
| RMS Power (4 Ohm) | 500W x 1 |
| RMS Power (2 Ohm) | 800W x 1 |
| Frequency Response | 20Hz - 250Hz |
| Signal-to-Noise Ratio | >90 dB |
| Input Sensitivity | 0.2V - 6V |
| Low Pass Filter | 50Hz - 250Hz (variable) |
| Subsonic Filter | 20Hz (fixed) |
| Bass Boost | 0 - 12dB (variable) |
| Phase Control | 0° / 180° (switchable) |
| Dimensions (L x W x H) | 10.0 x 8.0 x 2.0 inches |
| Weight | 5.0 lbs |
| Power Supply Voltage | 10 - 16V DC |
| Fuse Rating | 30A x 1 |
| Remote Bass Control | Included |
| Protection Features | Thermal, Overload, Short Circuit |
| Mounting Type | Screw terminals |
| Color | Black |
| Maintenance | Clean with dry cloth; avoid moisture |
| Safety | Disconnect battery before installation; ensure proper ventilation |
| Spare Parts / Reparability | No user-serviceable parts; contact professional for repair |
Frequently Asked Questions - DR-3725.1D Crunch
What is the power output of the Crunch DR-3725.1D?
The amplifier delivers 500W RMS at 4 ohms and 800W RMS at 2 ohms.
What type of amplifier is the DR-3725.1D?
It is a Class D monoblock amplifier designed for subwoofers.
What is the recommended power wire gauge for installation?
Use 4 AWG power and ground wire for optimal performance.
Does the amplifier include a remote bass control?
Yes, a wired remote bass level control is included.
What is the input sensitivity range?
The input sensitivity is adjustable from 0.2V to 6V.
How do I set the low-pass filter?
Adjust the LPF knob between 50Hz and 250Hz to match your subwoofer.
What protection features does the amplifier have?
It includes thermal, overload, and short circuit protection.
Can I bridge this amplifier?
No, it is a monoblock and cannot be bridged with another amplifier.
What is the fuse size required?
Use a 30A fuse near the battery for the power wire.
How do I connect the power and ground terminals?
Connect +12V to battery positive, GND to chassis ground, and REM to the head unit's remote turn-on wire.
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