1. Introduction
The Rock Series RKS-UL2000.1 is a Class D Monoblock car audio amplifier designed to provide powerful and efficient bass performance for subwoofer applications. This amplifier delivers up to 2000W RMS continuous power and 4000W maximum power, offering stable operation across 1 to 4 Ohm loads. It features adjustable bass boost and variable low/high pass filters for precise audio tuning. This manual provides essential information for the safe installation, operation, and maintenance of your RKS-UL2000.1 amplifier.
Image 1.1: Front view of the Rock Series RKS-UL2000.1 amplifier.
2. Safety Information
Read all instructions carefully before installing and operating the amplifier. Failure to follow these guidelines may result in damage to the amplifier, vehicle, or personal injury.
- Power Connection: Always disconnect the vehicle's negative battery terminal before making any power connections.
- Wiring: Ensure all wiring is properly routed and secured to prevent pinching or damage. Use appropriate gauge wiring for power and speaker connections.
- Ventilation: Mount the amplifier in a location that allows for adequate airflow to prevent overheating. Do not cover the amplifier's cooling fins.
- Professional Installation: If you are unsure about any aspect of the installation, seek assistance from a qualified car audio professional.
- Voltage: This amplifier operates on a 12-14 Volt DC automotive electrical system. Do not attempt to use it with other voltage systems.
3. Package Contents
Verify that all items are present in the package:
- Rock Series RKS-UL2000.1 Amplifier
- Remote Bass Controller
4. Product Features
The RKS-UL2000.1 amplifier includes the following key features:
- High-efficiency Class D Monoblock design.
- 2000W RMS / 4000W Max power output.
- 1-4 Ohm stable operation.
- Adjustable Bass Boost (0-18dB).
- Variable Low Pass Filter (LPF).
- Variable Subsonic Filter.
- Gain sensitivity controls.
- Compact aluminum chassis for efficient heat dissipation.
5. Setup and Installation
Proper installation is crucial for optimal performance and safety. It is recommended to have this amplifier installed by a professional car audio technician.
5.1 Mounting the Amplifier
Choose a mounting location that is dry, well-ventilated, and secure. Avoid mounting the amplifier directly on carpet or in enclosed spaces that restrict airflow. Ensure the mounting surface is strong enough to support the amplifier's weight.
5.2 Wiring Connections
Before making any connections, ensure the vehicle's battery is disconnected.
Power Connections
- +12V (Power): Connect a heavy-gauge power cable (e.g., 4 AWG or larger) directly from the positive terminal of the vehicle's battery to the +12V terminal on the amplifier. Install an appropriate fuse holder (not included) within 18 inches of the battery.
- GND (Ground): Connect a heavy-gauge ground cable of the same size as the power cable from the GND terminal on the amplifier to a clean, unpainted metal surface of the vehicle's chassis. Ensure a good electrical connection.
- REM (Remote Turn-On): Connect a remote turn-on wire (e.g., 18 AWG) from your head unit's remote output to the REM terminal on the amplifier. This wire turns the amplifier on and off with your head unit.
Image 5.1: Power (+12V, REM, GND) and Speaker output terminals.
Speaker Connections
Connect your subwoofer(s) to the SPEAKER terminals. This is a monoblock amplifier, designed for a single channel output. Ensure the total impedance of your subwoofer(s) is between 1 and 4 Ohms for stable operation.
Audio Input Connections
Connect the RCA output cables from your head unit or signal processor to the INPUT (RCA) terminals on the amplifier.
Image 5.2: Input (RCA) and control panel (GAIN, LPF, SUBSONIC, BASS BOOST, FREQ).
6. Operating Instructions
Once installed, adjust the amplifier settings for optimal sound performance.
6.1 Control Panel Adjustments
- GAIN: This control matches the amplifier's input sensitivity to the output of your head unit. Start with the gain at minimum and slowly increase it until you hear distortion, then back off slightly.
- LPF (Low Pass Filter): This filter allows only frequencies below the set point to pass through to the subwoofer. Adjust this to blend the subwoofer with your main speakers, typically between 60Hz and 100Hz.
- SUBSONIC: This filter removes extremely low frequencies that are inaudible and can cause damage to your subwoofer. Set it slightly below your subwoofer's port tuning frequency or around 25-30Hz.
- BASS BOOST FREQ: Selects the center frequency for the bass boost.
- BASS BOOST: Increases the output level at the selected bass boost frequency. Use sparingly to avoid distortion and potential speaker damage.
6.2 Remote Bass Controller
The included remote bass controller allows you to adjust the subwoofer output level from the driver's seat. Connect the controller to the 'REMOTE' port on the amplifier.
Image 6.1: Remote Bass Controller.
Image 6.2: Remote Bass Controller cable.
7. Maintenance
The RKS-UL2000.1 amplifier requires minimal maintenance.
- Cleaning: Periodically wipe the amplifier's exterior with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Ventilation: Ensure that the amplifier's cooling fins remain free of dust and debris to maintain proper heat dissipation.
- Connections: Occasionally check all power, ground, and speaker connections to ensure they are secure and free from corrosion.
8. Troubleshooting
If you experience issues with your amplifier, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No Power / Amplifier does not turn on | Blown fuse, loose power/ground/remote wire, faulty remote turn-on signal. | Check fuse at battery and amplifier. Verify all power, ground, and remote connections are secure. Test remote wire for 12V when head unit is on. |
| No Sound Output | Loose RCA cables, incorrect gain setting, speaker wires disconnected, amplifier in protect mode. | Check RCA connections. Adjust gain. Verify speaker wiring. If protect light is on, check for shorted speaker wires or overheating. |
| Distorted Sound | Gain set too high, improper crossover settings, poor ground connection, damaged speaker. | Reduce gain. Adjust LPF and Subsonic filters. Ensure ground connection is solid. Inspect subwoofer for damage. |
| Amplifier Overheats | Insufficient ventilation, impedance too low, gain set too high. | Ensure adequate airflow around the amplifier. Verify speaker impedance is within 1-4 Ohm range. Reduce gain setting. |
If these steps do not resolve the issue, contact Rock Series customer support or your authorized dealer.
9. Specifications
Technical specifications for the Rock Series RKS-UL2000.1 amplifier:
- Model: RKS-UL2000.1
- Amplifier Class: Class D Monoblock
- RMS Power Output: 2000W
- Max Power Output: 4000W
- Stable Impedance: 1-4 Ohms
- Operating Voltage: 12-14 Volts DC
- Bass Boost: 0-18dB (Adjustable)
- Low Pass Filter (LPF): Variable
- Subsonic Filter: Variable
- Dimensions (L x W x H): 18 x 9 x 3 inches
- Material: Aluminum
- Manufacturer: DCNY USA INC
10. Warranty and Support
For warranty information and technical support, please refer to the warranty card included with your product or contact your authorized Rock Series dealer. You may also visit the official Rock Series website for further assistance.
