1. Introduction
The DS18 G4000.5D GEN-X Full-Range Class D 5-Channel Amplifier is designed to deliver powerful and clear audio performance for your car audio system. This manual provides essential information for proper installation, operation, and troubleshooting to ensure optimal performance and longevity of your amplifier.
2. Safety Guidelines
- Professional Installation: It is highly recommended to have this amplifier installed by a qualified professional to prevent damage to the unit or your vehicle.
- Power Connections: Ensure all power connections are secure and properly insulated to prevent short circuits and electrical hazards. Use appropriate gauge wiring.
- Ventilation: Mount the amplifier in a location that allows for adequate airflow to prevent overheating. Avoid covering the heat sinks.
- Water Exposure: Do not expose the amplifier to moisture or water.
- Volume Levels: Prolonged exposure to high volume levels can cause hearing damage. Adjust volume responsibly.
3. Package Contents
- DS18 G4000.5D Amplifier
- Remote Bass Knob with Cable
- RCA Adapter (for high-level input)
- Mounting Hardware (screws)
- User Manual (this document)
4. Product Features
- High Power Output: Delivers up to 4000 Watts Max Power for robust audio.
- Versatile Impedance: Stable at 2 Ohm and 4 Ohm loads, with 1 Ohm stability for the subwoofer channel.
- Bridgeable Channels: Allows for flexible speaker configurations.
- Integrated Filters: Features High-Pass Filter (HPF) and Low-Pass Filter (LPF) for precise sound tuning.
- Bass Boost: Adjustable bass boost for enhanced low-frequency response.
- Compact Design: Small footprint for easy installation in various vehicle spaces.
- Remote Bass Knob: Included for convenient bass level adjustment.
5. Technical Specifications
| Feature | Specification |
|---|---|
| Total Watts (Peak) | 4000W |
| RMS Power @ 4 Ohm | 4 x 130W / SUB: 300W |
| RMS Power @ 2 Ohm | 4 x 220W / SUB: 600W |
| RMS Power @ 1 Ohm | SUB: 900W |
| RMS Power @ 4 Ohm (Bridged) | 2 x 420W |
| Frequency Response | 20Hz-20KHz |
| Signal to Noise Ratio | >90dB |
| Efficiency @ 4 Ohm | 0.83 |
| Damping Factor | 78 |
| Input Impedance | 22K |
| Channel Separation | 55dB |
| Total Harmonic Distortion (THD) | 0.0001 |
| Low Level Input Range | 0.25-6V |
| High Level Input | No |
| Selectable Crossover | HPF/LPF |
| Crossover Filter Range (HPF) | 10-250Hz |
| Crossover Filter Range (LPF) | 50-250Hz |
| Bass Boost Range | 0-12dB |
| Bass Boost Frequency | Fixed @ 45Hz |
| Infrasonic Filter | 10-50Hz |
| Phase Selector | No |
| Number of Channels | 5 |
| Item Model Number | G4000.5D |
| Item Weight | 5.92 pounds |
| Package Dimensions | 15.16 x 7.48 x 3.31 inches |
| Connectivity Technologies | RCA |
6. Setup and Installation
6.1. Mounting the Amplifier
Choose a mounting location that provides adequate ventilation and is protected from moisture. Ensure the amplifier is securely fastened to a solid surface in your vehicle.
Figure 1: Top view of the DS18 G4000.5D amplifier.
6.2. Wiring Connections
Proper wiring is crucial for performance and safety. Refer to the diagram below for power, ground, remote, and speaker connections.
Figure 2: Power input and speaker output terminals. Ensure correct polarity and secure connections.
- Power Input (+12V): Connect to the positive terminal of your vehicle's battery using a fuse-protected power cable of appropriate gauge.
- Ground (GND): Connect to a clean, unpainted metal surface on the vehicle chassis. Ensure a solid ground connection.
- Remote (REM): Connect to the remote turn-on output of your head unit.
- Speaker Output: Connect your speakers to the designated terminals. Pay attention to impedance and polarity.
6.3. Input Connections
The G4000.5D amplifier uses low-level RCA inputs. If your head unit does not have RCA outputs, you may use a high-level to low-level converter (often included or sold separately) connected to your speaker wires.
Figure 3: Control panel with RCA inputs and adjustment knobs.
Figure 4: RCA adapter for connecting high-level speaker outputs to the amplifier's low-level inputs.
7. Operating Instructions
7.1. Adjusting Controls
The amplifier features various controls to fine-tune your audio system. Adjust these settings carefully to achieve desired sound quality.
Figure 5: Close-up view of the amplifier's control panel, showing gain, crossover, and bass boost settings.
- Gain: Adjust the input sensitivity to match the output of your head unit. Start with the gain at minimum and slowly increase until distortion is heard, then back off slightly.
- HPF (High-Pass Filter): Used for full-range speakers to block low frequencies, preventing distortion and improving clarity. Adjustable from 10Hz to 250Hz.
- LPF (Low-Pass Filter): Used for subwoofers to block high frequencies, ensuring only bass notes are reproduced. Adjustable from 50Hz to 250Hz.
- Bass Boost: Increases the output at 45Hz. Adjustable from 0-12dB. Use sparingly to avoid distortion.
- Infrasonic Filter: Filters out extremely low, inaudible frequencies (10-50Hz) that can waste amplifier power and damage subwoofers.
7.2. Remote Bass Knob
The included remote bass knob allows for convenient adjustment of the subwoofer channel's bass level from your driving position.
Figure 6: The amplifier shown with the remote bass knob, which connects via a telephone-style cable.
8. Maintenance
To ensure the longevity and optimal performance of your DS18 G4000.5D amplifier, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the exterior of the amplifier. Avoid using harsh chemicals or abrasive cleaners.
- Connection Checks: Periodically inspect all wiring connections (power, ground, remote, and speaker) to ensure they are tight and free from corrosion.
- Ventilation: Ensure that the amplifier's ventilation fins remain clear of obstructions to allow for proper heat dissipation.
9. Troubleshooting
If you experience issues with your amplifier, consult the table below for common problems and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| No Power / No Sound | Blown fuse, loose power/ground/remote wire, amplifier in protect mode. | Check fuses, verify all power connections are secure, ensure remote wire is receiving +12V, check for shorted speaker wires. |
| Distorted Sound | Gain set too high, improper crossover settings, poor ground connection, damaged speakers. | Reduce gain, adjust crossover filters, check ground connection, inspect speakers for damage. |
| Amplifier Overheating | Insufficient ventilation, improper impedance load, prolonged high volume. | Ensure adequate airflow around the amplifier, verify speaker impedance matches amplifier's capabilities, reduce volume. |
| No Bass from Subwoofer | LPF set too low or off, subwoofer channel gain too low, phase incorrect. | Adjust LPF to appropriate frequency, increase subwoofer gain, check subwoofer phase setting. |
10. Official Product Video
Watch the official product video for a visual overview of the DS18 G4000.5D Full Range Amplifier Class D 5-Channel.
Video 1: G4000.5D Full Range Amplifier Class D 5-Channel - Features and overview by DS18.
11. Warranty and Support
DS18 products are designed and manufactured to the highest quality standards. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official DS18 website. For technical support or customer service inquiries, please contact DS18 directly through their official channels.
