Nobsound B100 Bluetooth 5.0 Tube Amplifier Instruction Manual

1. Introduction

This manual provides detailed instructions for the safe and efficient operation of your Nobsound B100 Bluetooth 5.0 Tube Amplifier. Please read this manual thoroughly before using the product and retain it for future reference.

The Nobsound B100 is a hybrid power amplifier featuring both vacuum tubes for pre-amplification and transistors for power amplification. It offers multiple audio input options including Bluetooth 5.0, PC-USB, U-disk, Coaxial, Optical, and two RCA analog inputs. It also provides speaker outputs, a 3.5mm headphone output, and a subwoofer output.

2. Safety Information

To prevent fire, electric shock, and injury, please observe the following safety precautions:

• Do not expose this appliance to rain or moisture.
• Do not remove the cover. No user-serviceable parts inside. Refer servicing to qualified personnel.
• Ensure proper ventilation. Do not block ventilation openings.
• Avoid placing the unit near heat sources or in direct sunlight.
• Use only the power cord supplied with the unit.
• Disconnect the power plug from the wall outlet if the unit is to be left unused for a long period.
• Do not insert foreign objects into the unit.
• Handle vacuum tubes with care. They can become hot during operation.

3. Package Contents

Verify that all items are included in your package:

• 1x Nobsound B100 Amplifier
• 1x Power Cord
• (Other accessories may vary by region or package)

Image: Nobsound B100 Amplifier and included power cord.

4. Product Overview

4.1 Front Panel

Image: Front view of the Nobsound B100 amplifier, showing the volume knob, VU meter, and vacuum tubes.

• Volume Knob: Adjusts the overall output volume.
• VU Meter: Displays the audio signal level.
• Vacuum Tubes: 6P17A tubes for pre-amplification.

4.2 Top Panel Controls and Indicators

Image: Top view of the Nobsound B100 amplifier, highlighting input selection buttons and indicators.

• Input Select Switch: Cycles through available audio inputs (AUX-1, AUX-2, Bluetooth, Optical, Coaxial, PC-USB).
• Input Channel Indicators: LEDs illuminate to show the currently selected input.
• Pause/Play Button: Controls media playback for compatible inputs.
• Next Song Button: Skips to the next track for compatible inputs.
• Previous Song Button: Skips to the previous track for compatible inputs.

4.3 Rear Panel Connections

Image: Rear view of the Nobsound B100 amplifier, showing all input and output ports, and the power switch.

• PC-USB Input: Connect to a computer for digital audio playback.
• Optical Input (OPT): Connect to devices with optical digital audio output.
• Coaxial Input (COAX): Connect to devices with coaxial digital audio output.
• AUX-1 / AUX-2 Inputs: RCA analog inputs for external audio sources.
• Bluetooth Antenna: For wireless Bluetooth connectivity.
• Subwoofer Output (SW.OUT): Connect to an active subwoofer.
• 3.5mm Headphone Output: For connecting headphones.
• Speaker Output: Connect to passive speakers (Left and Right channels).
• AC IN (100V-240V) & Power Switch: Power input and main power switch.

5. Setup Instructions

5.1 Tube Installation (if required)

The vacuum tubes are typically pre-installed. If you need to install or replace them, follow these steps:

1. Carefully align the pins of the tube with the holes in the tube socket.
2. Observe the gap mark on the tube socket and ensure the arrow on the tube is aligned with this gap.
3. Gently push the tube straight down into the socket until it is firmly seated. Do not force it.

Image: Diagram illustrating the correct method for installing vacuum tubes, showing alignment of pins and socket gap.

5.2 Connecting Speakers

Connect your passive speakers to the "SPEAKER OUTPUT" terminals on the rear panel. Ensure correct polarity (+ to + and - to -) for each speaker.

Image: Close-up of the speaker output terminals on the rear of the amplifier.

5.3 Connecting Audio Sources

Choose your desired input method:

• RCA (AUX-1/AUX-2): Connect analog audio devices (e.g., CD player, turntable with pre-amp) using RCA cables.
• Optical (OPT): Connect digital audio devices (e.g., TV, game console) using an optical cable.
• Coaxial (COAX): Connect digital audio devices using a coaxial cable.
• PC-USB: Connect to a computer using a USB cable for digital audio.
• Bluetooth: Ensure the Bluetooth antenna is attached. Pair with your Bluetooth-enabled device (see Operating Instructions).
• U-disk: Insert a USB flash drive containing audio files into the PC-USB port.

Image: Close-up of the various input ports on the rear panel, including RCA, Optical, Coaxial, and PC-USB.

5.4 Power Connection

Connect the supplied power cord to the AC IN port on the rear panel, then plug it into a suitable wall outlet.

Image: Close-up of the AC power input and main power switch on the rear panel.

6. Operating Instructions

6.1 Powering On/Off

Flip the power switch on the rear panel to the "ON" position to power on the amplifier. Flip it to "OFF" to power off.

6.2 Selecting Input Source

Press the "INPUT" button on the top panel to cycle through the available input sources (AUX-1, AUX-2, BT, OPT, COAX, PC-USB). The corresponding LED indicator will light up.

Image: Close-up of the input select button and indicators on the top panel.

6.3 Bluetooth Pairing

1. Select "BT" input using the input select switch. The Bluetooth indicator will flash.
2. On your mobile device, enable Bluetooth and search for "Nobsound B100".
3. Select "Nobsound B100" to pair. Once connected, the Bluetooth indicator will remain solid.

6.4 Adjusting Volume

Rotate the "VOLUME" knob on the front panel clockwise to increase volume and counter-clockwise to decrease volume.

Image: Close-up of the volume control knob on the front panel.

6.5 Media Playback Controls

For Bluetooth and U-disk inputs, use the "Pause/Play", "Next Song", and "Previous Song" buttons on the top panel to control media playback.

6.6 Subwoofer and Headphone Output

Connect an active subwoofer to the "SW.OUT" port for enhanced bass. Plug headphones into the 3.5mm headphone jack for private listening. Note that plugging in headphones will mute the speaker output.

7. Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use liquid cleaners or aerosols.
• Tube Replacement: If tubes need replacement, ensure the unit is powered off and unplugged. Allow tubes to cool completely before handling. Replace with compatible 6P17A vacuum tubes.
• Ventilation: Keep the ventilation openings clear of dust and debris to prevent overheating.

8. Troubleshooting

9. Specifications

10. Warranty and Support

For warranty information and technical support, please refer to the documentation provided with your purchase or contact Nobsound customer service directly. Contact information can typically be found on the manufacturer's official website or on your purchase receipt.

For spare tubes or specific technical inquiries, please contact Nobsound customer support.

11. Official Product Videos