DS18 SLC-X1650.2 Select Series 2 Channel Class AB Amplifier User Manual

1. Introduction

Thank you for choosing the DS18 SLC-X1650.2 Select Series 2 Channel Class AB Amplifier. This amplifier is designed to provide high-quality audio performance for your vehicle's sound system. To ensure proper installation and operation, please read this manual thoroughly before beginning. Keep this manual for future reference.

2. Safety Instructions

• Always disconnect the vehicle's battery negative terminal before installing or servicing any car audio components.
• Ensure all wiring is properly routed and secured to prevent damage or short circuits.
• Use appropriate gauge wiring for power, ground, and speaker connections as specified in this manual.
• Mount the amplifier securely in a location that allows for adequate ventilation and is protected from moisture and excessive heat.
• If you are unsure about any part of the installation process, seek assistance from a professional car audio installer.
• Do not operate the amplifier if it is damaged or malfunctioning.

3. Package Contents

The package should contain the following items:

• DS18 SLC-X1650.2 Amplifier
• User Manual

4. Features

• 2-Channel Class AB Amplifier design.
• Capable of handling a wide range of speaker impedances (2-8 Ohm).
• Full-range audio amplification, suitable for midranges, tweeters, and coaxial speakers.
• Adjustable Low Pass Filter (LPF) and High Pass Filter (HPF) for precise sound tuning.
• Selectable Bass Boost levels (0dB, +6dB, +12dB).
• Robust construction for durability and reliable performance.

5. Installation

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 there is enough space around the amplifier for proper heat dissipation.

Secure the amplifier using the provided mounting hardware. Mark the mounting holes, drill pilot holes if necessary, and fasten the amplifier firmly to the mounting surface.

5.2 Wiring Connections

Proper wiring is crucial for optimal performance and safety. Refer to the diagrams below for correct connections.

Image 1: View of the DS18 SLC-X1650.2 amplifier showing the power input terminals (GND, REM, +12V), fuse holder, and speaker output terminals (R+, R-, B+, B-).

Power Connections:

• +12V (Power): Connect this terminal directly to the positive (+) terminal of the vehicle's battery using a heavy-gauge power cable. An in-line fuse (not supplied, but the amplifier has a 35A fuse) should be installed within 18 inches of the battery.
• GND (Ground): Connect this terminal to a clean, unpainted metal surface on the vehicle's chassis. Ensure a good electrical connection by scraping away any paint or rust. Use a heavy-gauge ground cable of the same size as the power cable, and keep it as short as possible.
• REM (Remote Turn-On): Connect this terminal to the remote turn-on output of your head unit. This wire turns the amplifier on and off with your car's audio system.

Speaker Connections:

Connect your speakers to the "SPEAKER OUTPUT" terminals. Ensure correct polarity (+ to + and - to -) for each speaker. This amplifier supports 2-channel stereo or bridged mono configurations.

• Stereo Mode: Connect one speaker to R+ and R- for the right channel, and another speaker to B+ and B- for the left channel.
• Bridged Mode: For a single subwoofer or higher power output, connect the speaker across R+ and B-. Refer to the diagram on the amplifier for bridged wiring. The minimum impedance for bridged operation is 4 Ohms.

Image 2: View of the DS18 SLC-X1650.2 amplifier showing the input and control panel, including High Input, Line Out, Gain, Bass Boost, HPF, and LPF controls.

Audio Input Connections:

• RCA Input (LINE IN): Connect RCA cables from your head unit's pre-amp outputs to the amplifier's LINE IN jacks.
• High-Level Input (HIGH INPUT): If your head unit does not have RCA outputs, use the high-level input. Connect the speaker wires from your head unit to the HIGH INPUT connector.
• RCA Output (LINE OUT): These RCA outputs allow you to pass the audio signal to another amplifier in your system.

6. Controls and Adjustments

The DS18 SLC-X1650.2 amplifier features several controls to fine-tune your audio system:

• GAIN (Input Sensitivity): This control matches the amplifier's input sensitivity to the output level of your head unit. Adjust it to prevent distortion. Start with the gain at minimum and slowly increase it until you hear distortion, then back off slightly.
• BASS BOOST: Provides an adjustable bass enhancement at 0dB, +6dB, or +12dB. Use sparingly to avoid distortion.
• HPF (High Pass Filter): This filter allows frequencies above the set point to pass through to the speakers. Useful for protecting smaller speakers from low bass frequencies. Adjustable from 50Hz to 1.2KHz.
• LPF (Low Pass Filter): This filter allows frequencies below the set point to pass through to the speakers. Typically used for subwoofers. Adjustable from 50Hz to 200Hz.
• CROSSOVER Switch: Select between HPF, FULL (full range), or LPF operation.

7. Operating Instructions

Once the amplifier is correctly installed and all connections are secure:

1. Turn on your vehicle's ignition and head unit. The amplifier should power on automatically via the remote turn-on wire.
2. Start with the amplifier's gain control at its minimum setting.
3. Play a familiar piece of music at a moderate volume level on your head unit.
4. Slowly increase the amplifier's gain control until you hear any audible distortion, then reduce it slightly until the sound is clear.
5. Adjust the HPF, LPF, and Bass Boost settings to achieve your desired sound balance.
6. Avoid setting the gain too high, as this can lead to distorted audio and potential damage to your speakers or amplifier.

8. Maintenance

The DS18 SLC-X1650.2 amplifier requires minimal maintenance:

• Periodically check all wiring connections to ensure they are secure and free from corrosion.
• Keep the amplifier clean and free of dust and debris. Use a soft, dry cloth for cleaning.
• Ensure the amplifier's cooling fins are not obstructed to maintain proper heat dissipation.
• If the fuse blows, replace it only with a fuse of the same type and rating (35A).

9. Troubleshooting

10. Specifications

11. Product Overview Video

12. Warranty and Support

For warranty information and technical support, please refer to the official DS18 website or contact their customer service directly. Keep your purchase receipt as proof of purchase for any warranty claims.

For further assistance, visit the DS18 Store on Amazon.