technology

How to get your old speakers sounding brand new

In this DIY we’ll be making a wireless Bluetooth-enabled amplifier that will make your speakers sounding brand new, not only does it deliver a clean sound, it is a perfect device to use during parties due to its loud volume.

The simplicity of this device will shock you, this DIY is so easy to build that you can even make it as a school project, as it can be built really swiftly.

Materials

Amplifier make sure it has an inbuilt Bluetooth receiver with play back controls and a dual channel 50 watts amplified chip

Aluminium sheets

Stratocell foam

Screws

2 battery pack, one with 6 holding space and one with 4.

Power jack

PCB standoffs.

Cut aluminium sheets

Once you have got your hands on the material, we can start off by making the aluminium panels, you’ll need 2 one-millimetre-thick aluminium sheets, start of by cutting the rectangles with the measurements that is 6cm in length and 27 in width.  

Drill the holes

Screw some holes into the aluminium, 4 of these holes need to line up with the mounting holes on the amplifier, while the other four needs to be on either side of the small battery pack. Once you’ve marked all the places the supports, that will be fixed later, will be placed, you can drill the holes using a 3 millimetres drill bit, it is recommended to drill both the aluminium sheets together. If drilling is not up your ally, then you can make holes using a hammer and a nail.

You’ll need to make some extra holes on the base aluminium sheet, the sheet that will be at the bottom, so you can hold the battery packs in place with the help of some cable ties.

Use stratocell to extend playback button

Keep the aluminium sheets aside for some time, and take out the amplifier. We need to work on extending the amplifiers playback buttons so that they could be operated easily.

Cut out a piece of stratocell packaging foam, make sure that the cut out is long enough to cover the bottoms and high enough that they are at the same level as the supports that will be used.

Insert screws

Insert some screws into the foam at 1 centimeter interval, the screws should line up with the buttons on the amplifier, now get the aluminium sheet that will be on the top and drill matching holes so that the screws can poke through. Since you are already drilling holes make some more for the output terminals to make the process of connecting the speakers easier.

Clean up rough ends

Use a file to clean up the holes and the edges of the sheets, you can round up the edges as well, you don’t want to be bruised later while using it, this also gives it a sleeker finish look.

Assembling everything

The fun part begins, it’s time to assemble them all together. The battery packs, there are 2 battery packs that will be used, one that holds 6 batteries and other one that holds 4 batteries. The way you’ll be connecting them is in wires so that they act like one big battery pack, with an output of around 12 to 15 volts.

To achieve this, connect the red wire of one pack to the black wire of the other pack, you can either twist them together or solder them, get a power jack and twist or solder to the other two remaining wires, this time the red wire can be connected to the red wire of the jack and the black wire can be connected to the black wire of the jack. Once you’re done with this, insulate the joints with the help of some tape.

Attach the packs

As the packs are now ready, attach them to the sheet using some cable ties, you may need to make some holes in the pack for the cable ties to go through, forming a loop.

Attaching the supports

The supports that would give your amplifier a look are PCB standoffs. You’ll need 4 tall 25mm standoffs and four more shorter ones, make sure that the shorter ones when combined are the same height as the taller ones.

Screw in the taller standoffs to the base sheet on either side of the smaller battery pack. Screw the shorter standoffs together on the holes made on the amplifier which you will then screw to the base sheet, if it’s too shorts you can use washers so that they match the height of the taller standoffs.

Add in the batteries

It is recemented to use rechargeable batteries so that you wouldn’t have to unscrew the lid every time the batteries die out.

Before we move on to screwing the lid shut, make sure you switch on the amp’s power button. And the tiny switches are switched off.

Place the button extender over the buttons, you can use some tape so that it stays in place.

Put the lid on

You can finally put the lid on and tighten all the screws. TADA your creation is now complete, take some time and admire it. If you want to stick on to a speaker you can use Velcro to attach it, wire the speakers to the output terminals.

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