Nobsound TA-21 Mini Bluetooth 5.0 Digital Amplifier User Manual

Nobsound TA-21 Mini Bluetooth 5.0 Digital Amplifier

Specifications

• Brand: Nobsound
• Model: TA-21
• Audio input: 3.5mm AUX / Bluetooth
• Audio output: banana speaker jacks
• Bluetooth version: 5.0
• Max output power: 100W+100W
• Amp IC chip: TPA3221
• Matched speaker: 3”-10”/ 4-8
• Frequency response: 80Hz-20KHz
• Working voltage: DC 9V-24V / 3A or above
• Minimum input power: 50W
• Dimensions(WDH): 907823mm/3.543.070.91in
• Net weight: 143g/0.32lb
• Package weight: 600g/1.32lb

Product Usage Instructions

Connect Power Supply
Connect the power supply to the amplifier first and then plug it into the socket to avoid generating electric sparks.

Adjust Volume and Playback Controls
Use the buttons on the amplifier to adjust the volume, and play or pause music.

HOW TO USE

1. Connect the power supply to the amplifier first and then plug it into the socket to avoid generating electric sparks.
2. Wireless Input
3. Correctly connect passive speakers to the amplifier output with high-quality cables.
4. Long press the power button 2S to turn it on, and the indicator will be flashing blue(BT mode).
5. Turn on your audio source’s Bluetooth function, search, and click to connect. The blue indicator will be after a successful connection.
6. Wired Input
7. Correctly connect your audio source to the amp input with a high-quality AUX cable, and connect passive speakers to the amp output.
8.  Long press the power button 2S to turn it on, and the indicator will be steady on green(AUX mode).
9. Then through buttons, you can adjust the volume, and play or pause music.

WARM TIPS

1. Please connect the power supply to the amplifier first and then plug it into the socket to avoid electric sparks but this condition is normal and safe and has no harm to the amp.
2. The default comes with a power supply( 12V/5A Max Output 60W), it is enough to drive most home speakers. And speakers with bigger power please change the larger power supply(DC 9-24V).
3. When plugging in the AUX cable, the blue indicator(BT mode) will turn green(AUX mode), it will default select AUX input. If you want Bluetooth input, please plug out the AUX cable.

FRONT AND REAR PANEL

• Blue- -Bluetooth input
• Green– AUX input

Power input: DC9V-DC24V
This amplifier requires a 50W power supply at minimum, its auto power-off during use means that your speaker needs a high power supply to drive, please turn down the volume or change to another power supply with a higher output.

PARAMETERS

• Brand: Nobsound
• Model: TA-21
• Audio input: 3.5mm AUX / Bluetooth
• Audio output: banana speaker jacks
• Bluetooth version : 5.0
• Max output power: 100W+100W
• Amp IC chip: TPA3221
• Matched speaker: 3”-10”/ 4-8Ω
• Frequency response: 80Hz-20KHz
• Working voltage: DC 9V-24V / 3A or above
• Minimum input power : 50W
• Dimensions(WDH): 907823mm/3.543.070.91in
• Net weight: 143g/0.32lb
• Package weight: 600g/1.32lb

FREQUENTLY QUESTIONS

• Q: All cables are connected, but no sound output?

  • A: 1. Check if the indicator is on, and turn on the power button or knob if it is not on. If the indicator is still not on after turning on the power, you can find a laptop power and connect to test whether it is a machine fault or a power failure.
  • 2. If the indicator is on, check whether the VOL knob is in the minimum position. If so, turn clockwise to normal volume.
  • 3. If both of the above are normal, check the input device if it is paused, mute, or the volume is minimized.

• Q: Why there is sound distortion?

  • A: When the output power exceeds the normal power of the amplifier, there will be a large distortion. you can turn down the preamp volume or the power amplifier volume.

• Q: Why do loudspeakers make a lot of electric noise?

  • A: if you are not using the original factory standard power supply, please replace the power supply before testing. Many power supplies in the market have large interference coefficients, which will cause a lot of current sound.

• Q: Why after connecting the signal line, there is interferential sound even if not playing music?

  • A: If you use unshielded signal lines, there will be interference signals entering the power amplifier. If you hate the noise, please use the shielded signal lines or unplug the signal lines.

• Q: Why does the amplifier stop working after some time?
  

  • After some time off, it will work again.
  • A: The amplifier may be overheat-protected in this case, and the output power may have exceeded the rated power, so you can turn down the volume and try again.

• Q: Why does the volume of the machine stay the same, while the sound of different audio sources (such as CDS and mobile phones) is different?

  • A: The output range of different types of audio source devices is different, the mobile phone is usually 0.35mV, and the CD is 1V.The signal output amplitude of the sound source will directly influence the volume.

• Q: Why the sound of the power amplifier is not very good at the beginning, the high frequency is not clear, but after working for 8 hours the sound is normal.

  • A: Speakers and amplifiers are very sensitive equipment, they also need a process to know and match each other, after working together for 8 hours the sound will be good, new power amplifier and new speaker need more than ten hours.

CONTACT INFORMATION

• Address: Room 1329, Wang Cheng Building, Long Guan Street, Long Hua New District, Shenzhen, Guang Dong, China
• Contact: LIU CHENXI Tel: +8618570015672
• Email: nobsound@doukaudio.com

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