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TB21 TPA3116D2 50WX2+100W 2.1 Channel Bluetooth-compatible 5.0 Subwoofer Amplifier Board Power Audio Stereo Bass AMP
TB21 TPA3116D2 50WX2+100W 2.1 Channel Bluetooth-compatible 5.0 Subwoofer Amplifier Board Power Audio Stereo Bass AMP
TB21 TPA3116D2 50WX2+100W 2.1 Channel Bluetooth-compatible 5.0 Subwoofer Amplifier Board Power Audio Stereo Bass AMP
TB21 TPA3116D2 50WX2+100W 2.1 Channel Bluetooth-compatible 5.0 Subwoofer Amplifier Board Power Audio Stereo Bass AMP
TB21 TPA3116D2 50WX2+100W 2.1 Channel Bluetooth-compatible 5.0 Subwoofer Amplifier Board Power Audio Stereo Bass AMP
TB21 TPA3116D2 50WX2+100W 2.1 Channel Bluetooth-compatible 5.0 Subwoofer Amplifier Board Power Audio Stereo Bass AMP
TB21 TPA3116D2 50WX2+100W 2.1 Channel Bluetooth-compatible 5.0 Subwoofer Amplifier Board Power Audio Stereo Bass AMP
TB21 TPA3116D2 50WX2+100W 2.1 Channel Bluetooth-compatible 5.0 Subwoofer Amplifier Board Power Audio Stereo Bass AMP
TB21 TPA3116D2 50WX2+100W 2.1 Channel Bluetooth-compatible 5.0 Subwoofer Amplifier Board Power Audio Stereo Bass AMP
TB21 TPA3116D2 50WX2+100W 2.1 Channel Bluetooth-compatible 5.0 Subwoofer Amplifier Board Power Audio Stereo Bass AMP
TB21 TPA3116D2 50WX2+100W 2.1 Channel Bluetooth-compatible 5.0 Subwoofer Amplifier Board Power Audio Stereo Bass AMP
TB21 TPA3116D2 50WX2+100W 2.1 Channel Bluetooth-compatible 5.0 Subwoofer Amplifier Board Power Audio Stereo Bass AMP

TB21 TPA3116D2 50WX2+100W 2.1 Channel Bluetooth-compatible 5.0 Subwoofer Amplifier Board Power Audio Stereo Bass AMP

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1. How to choose the power supply?
The power supply with the board is very key, the selected power supply ripple must be small, ripple large power supply will lead to power amplifier bottom noise, there is a current sound.The higher the voltage, the higher the current, and the higher the power output. If you only have 12V 1A, you can have 3-4 inch speakers.If you are above 19V 5A, no problem with 8-10 inches, power must be highly valued.If the voltage is too low and the sound is amplified, it will easily cause sound distortion. If the current is too low and the horn cannot be brought up, the voltage will be pulled down, which will lead to abnormal operation or poor sound quality.
It is recommended to use 18V19V24V power supply with current above 5A.If you only have 9V12V or 1A 2A power supply, you can also use it but with low power. When using it, choose the volume close to the maximum, which may cause distortion and affect the sound quality.
2. How to select speakers?
About the speaker type: commonly used speakers are generally 4-8 ohms, can be used.Speakers in left and right channels need to be connected to full frequency or medium and high frequency speakers with power between 20W and 100W.Subwoofer speakers cannot be connected to ordinary speakers. Speakers with subwoofer speakers should be connected, with power between 20-100W.The subwoofer horn must have a dive frequency of at least 50Hz.
If your speaker power is small, such as between 20W-50W can also be used, the power supply voltage needs to be small, to prevent the loudspeaker burnt after loud, such as choose power below 15V.If you are a 50W-100W speaker, you don’t have to worry about burning out the horn. You can choose a 12-24V power supply. The higher the voltage you choose, the more sound or power you can output.Speaker power is not easy to exceed 100W, otherwise it will affect the sound quality.
3. Audio input mode
There are two audio input modes for this audio amplifier module: one is Bluetooth-compatible input and the other is AUX input. Bluetooth-compatible mode is preferred. Bluetooth-compatible can be connected in either mode.As long as the Bluetooth-compatible connection is successful, it is Bluetooth-compatible mode, and bluetooth mode supports automatic back up.AUX insert is AUX mode when Bluetooth-compatible is disconnected.It should be noted that the Bluetooth-compatible connection of this module is disconnected when using AUX mode.
4. How to adjust the main volume?
The MAIN – VOLUME knob is used to adjust the MAIN VOLUME.The right main volume goes up and the left main volume goes down.The master volume affects both the left and right channels and the subwoofer volume.
5. How to adjust the height and bass of the left and right channels?
R&L CHANNEL – BASS knob is for BASS, right-handed BASS enhancement, and left-handed BASS attenuation.When the knob is in the right-most position, it does not enhance or attenuate the bass.
The R&L CHANNEL – TREBLE knob is used to control the TREBLE, with right-handed TREBLE enhancement and left-handed TREBLE attenuation.When the knob is in the middle, it does not enhance or attenuate the treble.
Note when adjusting high and low sounds: when the TREBLE or BASS sounds are right-rotated to near maximum, if the sound distortion is distorted, the gain of the TREBLE or BASS sounds is too large. It is necessary to turn the TREBLE or BASS knob to the left to lower the gain or turn the MAIN-VOLUME knob on the right to the left to reduce the total VOLUME.
6. How to adjust the subwoofer?
SUBWOOFER – VOLUME controls the VOLUME of the SUBWOOFER.The right-handed volume goes up and the left-handed volume goes down.
The SUBWOOFER – FREQ knob controls the cutoff frequency of the SUBWOOFER.The right frequency increases and the left frequency decreases.The frequency adjustment range is 20HZ-200Hz.
7. It’s ok to have a small voice, but after the voice becomes louder, there will be the phenomenon of sound turbidity.
The sound is distorted, please turn down the total volume or change the adapter to a higher voltage level.
8. It’s ok to have a small voice, but when the voice gets louder, there will be the phenomenon of sound lag.
If the input power is insufficient and the power is protected by its own intermittent power failure, please replace the power with a more powerful one.Or the power is too big, the power amplifier heating seriously, appeared the heat protection situation, reduce the power use or strengthen the heat dissipation.
9.What factors are associated with sound quality?
The quality of sound is not only related to the power amplifier module, but also to the power supply, sound source and the whole sound system.Basically every link of the sound system will affect the sound quality, among which the main link is the audio transmission line, audio power supply, tone circuit, amplifier circuit, speakers and the surrounding environment.The sound quality is best when the sound source, power supply, amplifier module and the speaker are matched.

Brand Name:
TCXRE
Certification:
NONE
Origin:
CN(Origin)
Maximum Power Per Channel:
100W
Model Number:
ZK-TB21
Package:
Yes
Channels:
3 (2.1)

SHIPPING AND DELIVERY

We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.

REFUNDS & RETURNS POLICY

Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.

Refunds

Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
  • If you received the wrong item you can request a refund or a reshipment.
  • If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of Buying & arriving (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of https://fastedoor.com

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.

Exchanges

If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

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