How to Make Bluetooth Speaker With Powerful Bass

Hi readers In this instructables, i will show you how to create a Bluetooth speaker with powerful bass using readily available components

I made this surprisingly powerful speaker using easily available materials such as a speaker, Bluetooth module, audio amplifier, battery charging module, a 3D printed box, and a rechargeable battery. By combining these elements, i built a portable speaker that not only provides wireless connectivity but also delivers a rich and immersive audio experience.

I was really happy to see the results and therefore I want you to try building the same, i have provided list of all the components to make this and still if you find any need of additional information get in touch with me in the comments section.

Uses of this speaker!

There is not only one specific use but the areas of applications of this speaker are many, imagine a small house party with this bass-boosted speaker! or a game on your smartphone with the sounds playing on this speaker or replacing your low-sound laptop speaker with this! The application areas depend on you.

One thing is sure your friends will definitely be impressed by seeing your creation.

I will be adding name of the parts below and these are generic names you can just check for them on your local or online shops

Speaker

The speaker is the main part of any audio system. I got this speaker from an online store for less than 4$, I built the frame for this project taking into account of the dimensions from the speaker.

Bluetooth Module

A Bluetooth module allows wireless audio streaming from various devices such as smartphones, tablets, or computers. i found this inexpensive board on a local electronics shop.

Mobile battery

I wanted to make this project as small as possible so instead of using cylindrical shaped batteries i will be using square shaped battery from my old phone that still has a very good backup time

Audio Amplifier or pam8403-5v-2-channel-stereo-audio-amplifier

The signal from a Bluetooth board is very low to power this speaker so we need an amplifier. An audio amplifier is used to enhance the audio signal from the Bluetooth module and drive the speaker with sufficient power.

Battery Charging Module

To make the speaker portable, a rechargeable battery is needed. To charge the lithium polymer battery I will be using the TP 4056 charging board

3D Printed Box

I designed a 3D-printed box to enclose all the components securely. Designed the box with proper considerations to optimize sound quality and bass response.

Rechargeable Battery

While selecting the battery we need to consider a High-capacity rechargeable battery that can provide sufficient power to drive the speaker and maintain a reasonable playback time. I found that mobile phone battery fits these conditions while consuming very less space inside the 3d printed case.

The design of this project is very simple, I have designed the case or housing on tinkercad software and sliced the design using Cura.

I have added the design file at the bottom of this step, if you are willing to print these, just download the model, slice in cura, and feed the codes to the 3d printer.

I used orange PLA filament to print the parts you can use the color of your own choice.

The lid was also printed with the same color, the choice of infill I recommend is 40 to 50% for good strength.

It took me around 2 hours to print the main body and around 30mins to print the base, This speed may vary depending on the type of printer that you are using.

I will split the circuit into 3 parts

Audio amplifier, Bluetooth module, and Charging board, The audio amplifier and Bluetooth module are paired together.

As we are using a single speaker we don't need all of the ports on a board, Audio amplifier has right, common, and left ports, and same we can see on the Bluetooth board.

Connect the left and common of both boards together, Now for the power supply both boards need the power to operate So I will be connecting these VCC and GND pins to the output terminals of the battery charger.

To switch on and off whenever needed I added a switch to the positive side, Charging board b+ and b- is connected to a mobile battery.

Note: I added a 18650 instead of a mobile battery in the circuit, make sure you are soldering the right terminals of the lipo to the holder.

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We can start by soldering wires to the audio board and then connecting wires to speakers, making the connections step by step so that we do not miss any of the connections.

After this, we can connect the Bluetooth board to this amplifier.

Now let's move on to the battery and the charging board connections, and solder the wires to the charging board.

Connect the battery to the board, later we can finish the connections with a switch.

After you double check the connections we can start to house or case the components.

To do this I started adding the speaker first followed by adding hot glue to the sides, these ensure the speakers don't fall off by any chance, and now the leftover components can be added on the sides.

Use a tiny amount of hot glue to stick these components on the inner walls of the 3D-printed frame.

After the circuit is added you can gently place the battery on top of the speaker by adding a layer of hot glue.

The layer of hot glue must not be very hot as we are dealing with the battery, allow some time to stick.

Finally, add the switch to the base plate and close the back lid, fill the side surfaces with the hot glue.

• Using this speaker is very simple like eating a cake!
• Just charge the battery if you want to by connecting a charging plug to the port, allow to charge for an hour
• As of I tested charging for an hour will give you continuous 2 and half hours of backup time when the speaker is fully used
• After you switch on the device open Bluetooth on your phone or tablet
• You can see the name of our Bluetooth speaker as 3.0 BT, click on that and wait for the connection
• After the connection, you can start playing your favorite music or videos and take the feel of that pure bass coming out of the speaker

Like I said earlier you will be amazed by the quality of sound.

Don't miss to watch this video that includes complete step-by-step instructions and a working video.

Adding a separate link to watch if the browser does not support direct videos https://youtu.be/2tmpmo8Rk2Q

Hope you will definitely try to build this project in your spare time, Thanks, and have a great day.