How to Make a Powerful High-Bass Bluetooth Speaker From Old TG-113 Speaker

If you think the TG113 Bluetooth speaker is just an average budget speaker, think again! In this project, I transformed the simple TG113 speaker box into a powerful Bluetooth speaker that delivers crystal-clear audio with deep, punchy bass—far better than its original performance. This upgraded speaker is not only loud and immersive but also easy to operate, portable, and stylish. The best part? The whole modification is easy to build, requires no expensive components, and can be done using simple tools at home.

Whether you love DIY audio projects or want to breathe new life into an old Bluetooth speaker, this guide will show you step-by-step how to create a powerful and stylish Bluetooth speaker box with excellent sound clarity.

6mm MDF Board

TP4056 charging module

In the first step, take your old TG113 Bluetooth speaker box and carefully open it using a small screwdriver or pry tool. Once the case is opened, gently remove all the internal components one by one. Take out the speaker driver, the passive radiator, the battery pack, and the amplifier/Bluetooth module.

Make sure you do not damage any wires or connectors while removing the parts, as we’ll be reusing every component in our new speaker box. After removing everything, keep all the parts safely aside.

For building the new and stronger speaker enclosure, take a 6mm MDF board and cut out all the required pieces according to the dimensions below:

1. Left & Right Side Panels: 7.5 cm × 6.8 cm
2. Front & Back Panels: 24 cm × 8 cm
3. Top & Bottom Panels: 24 cm × 7.5 cm

Make sure all the cuts are straight and accurate, as proper alignment helps in achieving better sound quality and strong bass response. After cutting, smooth the edges with sandpaper to ensure perfect fitting during assembly.

Next, take the front MDF panel (24 × 8 cm) and mark the positions where the speaker and passive radiator will be installed. Refer to your design or picture for exact placement.

Use a cup drill/hole saw to cut out perfectly round holes that match the size of your TG113 speaker and passive radiator. Make sure the cuts are smooth and aligned properly so the sound output remains clean and distortion-free.

Once the holes are ready, insert the speaker and the passive radiator into their respective openings. Apply a hot glue stick around the edges to fix them tightly in place. Ensure there are no gaps, as a well-sealed front panel enhances bass performance and overall sound clarity.

Now it’s time to build the main enclosure. Take the left, right, top, and bottom MDF panels and start assembling them around the front panel.

Use Fevicol or Heatax wood adhesive to stick all four panels firmly in place except the back panel. Make sure the edges align properly, and press the joints tightly for a perfect seal. Allow the box to dry for a few hours so the structure becomes strong and stable.

After the glue has dried, position the back panel and drill small holes for screws. Fix the back panel using screws so that it can be removed later if needed for repairs or upgrades.

Once everything is fixed, use sandpaper to smooth all the edges and corners. This not only gives the box a clean look but also improves the finishing before painting or polishing.

To make your speaker box fully functional and easy to operate, prepare the top and front panels for switches and indicator LEDs.

On the Top Panel:

Use a 5mm drill bit to make five holes for the push-button switches. These buttons will control functions like power, mode, play/pause, and volume adjustment—just like the original TG113 speaker.

On the Front Panel:

Drill three 5mm holes for LEDs:

1. 2 LEDs for charging indication (charging & fully charged)
2. 1 LED for power on/off status

Make sure the holes are aligned properly and clean the edges with sandpaper for a neat finish.

In my TG113 amplifier board, the charging section was damaged, so the built-in charging system was not working. To solve this and ensure safe charging for the 3.7V Li-ion battery, I added a TP4056 charging module, which is perfect for single-cell battery charging.

Installing the Charging Module:

1. Take a Micro USB female connector jack and mount it on the back panel of your speaker box.
2. Connect the Micro USB jack wires to the input terminals (IN+ / IN−) of the TP4056 module.
3. Now, connect the output terminals (BAT+ / BAT−) of the TP4056 directly to the battery input terminals of the amplifier board.
4. BAT+ ➝ Amplifier Battery +
5. BAT− ➝ Amplifier Battery −

This setup provides a stable and safe charging system for your battery and works far better than the damaged charging section of the TG113 board.

Make sure all connections are secure and insulated properly to avoid short circuits.

To improve the overall performance and appearance of your Bluetooth speaker box, we will now enhance the back panel by adding an external antenna and an SPST power switch.

Installing the Antenna

Attach a small external antenna on the back panel for better FM radio reception and a more premium look.

1. Drill a hole according to your antenna size.
2. Fix the antenna firmly using screws or a nut.
3. Connect a wire from the antenna terminal to the FM ANT point on your TG113 amplifier board.
4. This greatly improves FM signal strength and clarity.

Adding the SPST Switch

Next, install an SPST ON/OFF switch on the same back panel.

1. Drill a hole according to the switch size.
2. Insert and tighten the switch.
3. Connect the battery’s positive wire to one terminal of the switch.
4. Connect the other switch terminal to the amplifier board’s positive input.

This allows you to manually power the speaker box ON or OFF without depending on the amplifier’s soft switch.

Now it’s time to connect the control switches and place all components inside the speaker box.

Connecting the Push-Button Switches

Take five long-tail push-button switches and connect them in parallel with the existing button pads on the TG113 amplifier board.

These switches will handle all the main functions such as:

1. Power
2. Play/Pause
3. Mode
4. Volume Up
5. Volume Down

After confirming proper connections, insert all five switches into the drilled holes on the top panel and fix them securely using hot glue.

Complete the Wiring

Now connect the remaining components carefully:

1. Speaker wires → to amplifier SPK+ and SPK−
2. Battery wires → from TP4056 output to amplifier battery input
3. Antenna wire → to FM ANT point
4. LED wires → to corresponding indicator terminals on the amplifier

Make sure every connection is solid and insulated to avoid short circuits.

Final Assembly

Place all the components neatly inside the MDF speaker box:

1. Fix the amplifier board
2. Secure the battery
3. Position the TP4056 charging module
4. Arrange wires cleanly

Finally, fix the back panel and tighten it properly with screws. This completes your custom high-bass Bluetooth speaker box.

Now it’s time to test the final result of your hard work. After assembling everything and tightening the back panel, power ON your new Bluetooth speaker box.

You can see in the video link that the sound quality is highly impressive. The speaker delivers:

1. Clear vocals
2. Powerful bass
3. No distortion even at higher volumes

Check Complete Project Video Here 👉https://youtu.be/uL4rf8w00HQ

The FM radio reception has also improved significantly because of the external antenna you added. The tuning is smoother and the audio clarity is much better compared to the original TG113 speaker.

Overall, the upgraded speaker box performs far better than the stock TG113, both in sound quality and bass output, making this DIY project totally worth it.

In this project, we transformed an ordinary TG113 Bluetooth speaker into a powerful, high-bass, and crystal-clear sound speaker box using the same internal components—speaker driver, passive radiator, amplifier board, and battery. By building a custom MDF enclosure, adding proper ventilation, installing external switches, upgrading the charging system with a TP4056 module, and improving FM reception with an external antenna, we achieved a speaker that performs far better than the original TG113 design.

The new enclosure boosts the bass response, enhances clarity, and gives the speaker a premium, professional look. With better control buttons, strong MDF construction, safe battery charging, and improved FM signal strength, this DIY build is perfect for anyone who wants to upgrade their old Bluetooth speaker into a more powerful and stylish audio system.

The final result is a compact, good-looking, and highly impressive Bluetooth speaker box that delivers loud audio, deep bass, and smooth FM performance—making it a fun and rewarding DIY project for electronics lovers.