LTC ATM8000BT Hybrid Amplifier Karaoke Hi-Fi with FM User Manual

1. Introduction

The LTC ATM8000BT is a versatile hybrid amplifier featuring an integrated FM tuner, Bluetooth connectivity, and multiple input options including USB, SD, and MP3. It supports surround sound speaker configurations and offers karaoke functionality with two microphone inputs and adjustable effects. This manual provides detailed instructions for setup, operation, and maintenance to ensure optimal performance and longevity of your device.

2. Safety Instructions

• Read all instructions carefully before operating the amplifier.
• Do not expose the unit to rain or moisture to prevent fire or electric shock.
• Ensure proper ventilation. Do not block any ventilation openings.
• Place the amplifier on a stable, level surface.
• Do not place objects filled with liquids, such as vases, on the apparatus.
• Unplug the unit from the power outlet during lightning storms or when unused for long periods.
• Refer all servicing to qualified service personnel.

3. Product Overview

3.1 Front Panel

This image displays the front panel of the LTC ATM8000BT amplifier. Key features visible include the power button, USB and SD card slots, MP3 and microphone inputs, a digital display, and various control knobs for volume, microphone effects, and audio output.

• POWER Button: Turns the unit on or off.
• HI/REC Button: Activates high-frequency adjustment or recording function.
• C/J/X Button: Used for control, jumping tracks, or exiting menus.
• INPUT Button: Selects the audio input source (e.g., FM, Bluetooth, USB, SD, Optical, MP3).
• FUNCTION Button: Cycles through various operational modes or settings.
• EQ Button: Adjusts equalizer settings for audio output.
• SPEAKER A/B Button: Selects speaker output groups A, B, or A+B.
• USB Port: For connecting USB storage devices for playback or recording.
• SD Card Slot: For inserting SD memory cards for playback or recording.
• MP3 Input (3.5mm jack): For connecting external MP3 players or smartphones.
• MIC1 Input (6.35mm jack): First microphone input for karaoke or voice.
• MIC2 Input (6.35mm jack): Second microphone input for karaoke or voice.
• Digital Display: Shows current mode, track information, and settings.
• SUB OUT Knob: Adjusts the subwoofer output level.
• PRE OUT Knob: Adjusts the pre-amplifier output level.
• MASTER VOLUME Knob: Controls the overall output volume of the amplifier.
• MIC VOL Knob: Adjusts the volume level of the connected microphones.
• MIC BASS Knob: Adjusts the bass frequency level for microphone input.
• MIC TREBLE Knob: Adjusts the treble frequency level for microphone input.
• MIC ECHO Knob: Adjusts the echo effect applied to microphone input.

4. Setup

4.1 Speaker Connections

Connect your speakers to the appropriate speaker terminals on the rear panel of the amplifier. The ATM8000BT supports multiple speaker outputs (4 x 75W + 3 x 20W) with an impedance of 8 Ohms. Ensure correct polarity (+ to + and - to -) for all speaker connections to prevent audio phase issues.

4.2 Audio Source Connections

• Optical Input: Connect digital audio sources like TVs, CD players, or game consoles using an optical cable.
• MP3 Input: Use a 3.5mm audio cable to connect portable devices such as smartphones or MP3 players to the front panel MP3 jack.
• USB/SD: Insert a USB flash drive or SD memory card into the respective slots on the front panel.

4.3 Microphone Connections

Plug your microphones into the MIC1 and MIC2 6.35mm jack inputs located on the front panel. Ensure microphones are securely connected before use.

4.4 Power Connection

Connect the provided power cable to the amplifier's power input and then to a standard AC 220-240V ~ 50/60Hz electrical outlet.

5. Operating Instructions

5.1 Power On/Off

Press the POWER button on the front panel to turn the amplifier on or off. The digital display will illuminate when the unit is powered on.

5.2 Input Selection

Press the INPUT button repeatedly to cycle through the available audio sources: FM, Bluetooth, USB, SD, Optical, and MP3. The selected input will be shown on the digital display.

5.3 Bluetooth Operation

1. Select the Bluetooth input using the INPUT button.
2. On your smartphone or other Bluetooth-enabled device, search for available Bluetooth devices.
3. Select 'ATM8000BT' from the list to pair. The amplifier will indicate a successful connection.
4. You can now play audio from your device through the amplifier.

5.4 FM Tuner Operation

Select the FM input. Use the navigation buttons (e.g., C/J/X, HI/REC) to scan for radio stations. The amplifier supports programmable stations for easy access to your favorites.

5.5 USB/SD Playback & Recording

Insert a USB drive or SD card into the corresponding slot. The amplifier will automatically detect and begin playing compatible audio files. To record audio from another source onto the USB/SD media, select the desired input and then press the HI/REC button to initiate recording.

5.6 Karaoke Function

After connecting microphones to MIC1 and MIC2 inputs:

• Adjust microphone volume using the MIC VOL knob.
• Fine-tune vocal tone with the MIC BASS and MIC TREBLE knobs.
• Add an echo effect to your vocals using the MIC ECHO knob.

5.7 Volume Control

Adjust the overall output volume of the amplifier using the large MASTER VOLUME knob. Individual adjustments for subwoofer output and pre-amplifier output are available via the SUB OUT and PRE OUT knobs, respectively.

6. Maintenance

To ensure the longevity and optimal performance of your LTC ATM8000BT amplifier, follow these maintenance guidelines:

• Cleaning: Wipe the amplifier's exterior with a soft, dry cloth. Do not use liquid cleaners or abrasive materials.
• Ventilation: Ensure that the ventilation openings on the top and sides of the unit are not blocked. Proper airflow prevents overheating.
• Environment: Avoid exposing the amplifier to direct sunlight, excessive heat, moisture, or extreme temperatures.
• Servicing: Do not attempt to open or service the unit yourself. Refer all servicing to qualified service personnel.

7. Troubleshooting

If you encounter issues with your amplifier, consult the following troubleshooting guide:

• No Power: Check that the power cable is securely connected to both the amplifier and a working electrical outlet. Ensure the POWER button is pressed.
• No Sound Output: Verify that the correct input source is selected. Check all speaker connections for proper polarity and secure fit. Ensure the MASTER VOLUME knob is turned up and not at minimum. Check individual MIC VOL, SUB OUT, and PRE OUT knobs if applicable.
• Bluetooth Pairing Issues: Ensure the amplifier is set to Bluetooth input. Confirm that your device's Bluetooth is enabled and discoverable. Try moving your device closer to the amplifier.
• Microphone Not Working: Check that microphones are securely plugged into the MIC1/MIC2 jacks. Adjust the MIC VOL knob. Test microphones with another device if possible to confirm functionality.
• USB/SD Playback Errors: Ensure the USB drive or SD card is formatted to a compatible file system (e.g., FAT32) and contains supported audio file types. Try a different USB drive or SD card.
• Recording Issues: Verify that the USB drive or SD card has sufficient free space. Ensure the correct input source is selected for recording.

8. Specifications

9. Warranty and Support

For warranty information, technical support, or service inquiries, please contact your original retailer or the manufacturer directly. It is recommended to retain your proof of purchase for warranty claims.