S.M.S.L AD18 HiFi Audio Stereo Amplifier with Bluetooth 4.2 User Manual

Table of Contents

1. Package Contents
2. Product Overview
3. Connecting the Amplifier
4. Operating Instructions
5. Troubleshooting Tips
6. Frequently Asked Questions

1. Package Contents

• SMSL AD18 Amplifier
• 24V Power Supply (US Plug)
• Micro USB Cable
• Remote Control
• Antenna

2. Product Overview

The SMSL AD18 HiFi Audio Stereo Amplifier is a compact, full digital class D Bluetooth amplifier with a built-in headphone amplifier and subwoofer output. It supports USB, coaxial, analog, Bluetooth, and two optical inputs. The amplifier uses DSP technology and features a 1.44-inch color screen with adjustable brightness.

3. Connecting the Amplifier

1. Connect the 24V power supply to the amplifier and plug it into a power outlet.
2. Connect your audio source to the amplifier using the appropriate input (USB, coaxial, analog, Bluetooth, or optical).
3. For passive speakers, connect them to the amplifier output port.
4. If using a subwoofer, connect it to the subwoofer output.
5. For headphones, connect them to the 3.5mm headphone jack.

4. Operating Instructions

1. Turn on the amplifier using the power button on the front panel or the remote control.
2. Select the desired input source using the "Input" button on the front panel or the remote control.
3. Adjust the volume using the volume knob on the front panel or the volume buttons on the remote control.
4. To adjust treble and bass levels, press the "EQ" button on the remote control and use the "+" and "-" buttons to change the levels.
5. To connect a Bluetooth device, enable Bluetooth on your device and search for "AD18" to pair. For NFC-enabled devices, touch the device to the NFC logo on the amplifier.

5. Troubleshooting Tips

• If the amplifier does not power on, check the power supply connection and ensure it is plugged into a working outlet.
• If there is no sound or poor sound quality, check the audio source connection and ensure the correct input source is selected.
• If the Bluetooth connection is not working, ensure your device's Bluetooth is enabled and in range. Try disconnecting and reconnecting the Bluetooth connection.
• If the remote control is not working, check the battery and replace it if necessary. Ensure there are no obstructions between the remote control and the amplifier.

6. Frequently Asked Questions

Q: What type of speakers can be used with the SMSL AD18?

A: The SMSL AD18 is designed to power passive speakers with an impedance of 4 ohms and can produce 80Wx2 output power.

Q: Can the amplifier be used with headphones?

A: Yes, the SMSL AD18 features a 3.5mm headphone jack and an independent headphone amplifier design.

Q: What is the range of the Bluetooth connection?

A: The Bluetooth connection has a range of up to 10 meters or more, depending on the environment and any potential obstacles.

Q: What Bluetooth version does the SMSL AD18 support?

A: The SMSL AD18 supports Bluetooth 4.2 with apt-X and NFC for easy pairing.

Q: Can I connect multiple audio sources to the amplifier at the same time?

A: Yes, the SMSL AD18 supports USB, coaxial, analog, Bluetooth, and two optical inputs. You can switch between the different inputs using the "Input" button on the front panel or the remote control.

Product FAQ:

Q: What are the inputs supported by the S.M.S.L AD18 HiFi Audio Stereo Amplifier?
A: The amplifier supports USB, coaxial, analog, Bluetooth, and two optical inputs.

Q: Does the S.M.S.L AD18 HiFi Audio Stereo Amplifier have a subwoofer output?
A: Yes, the amplifier has a subwoofer output.

Q: What is the output power of the S.M.S.L AD18 HiFi Audio Stereo Amplifier?
A: The amplifier produces 80Wx2 output power for 4ohm speakers. For 8ohm speakers, it produces 45Wx2 output power.

Q: What is the special feature of the S.M.S.L AD18 HiFi Audio Stereo Amplifier?
A: The amplifier supports apt-X and has a customized BT4.2 Bluetooth module, making it easy to connect with Bluetooth by NFC.

Q: What is included in the package of the S.M.S.L AD18 HiFi Audio Stereo Amplifier?
A: The package includes the SMSL AD18 amplifier, a 24V power supply (US Plug), a Micro USB cable, a remote control, an antenna, and a 1-year warranty.

Q: Can I use this amplifier with my vinyl player?
A: Only if the turntable has a built-in or separate phono preamplifier.

Q: Is there any disturbance when using the 3.5mm input jack (aux) on this amp?
A: There may be some noise or hum in the background when using the 3.5mm input jack. It is recommended to use other inputs such as coaxial or optical if possible.

Q: What is the size of the external 24v DC power supply for this amp?
A: The power supply is approximately the same size as the amplifier itself.

Q: Can I control the sub volume or levels via this unit when using a powered sub?
A: Yes, the SMSL's sub output level is variable and raises/lowers in sync with the amp's volume position. However, you still need to set the master volume for the sub on the powered sub itself.

Q: Is this amplifier a significant upgrade from the SMSL Q5 Pro?
A: It depends on your definition of "significant." The S.M.S.L AD18 HiFi Audio Stereo Amplifier offers 30W more per side, a subwoofer out, and advanced DSP technology.