Hi ,Welcome to my instructables
This instructables will guide you to build simple,cheep and yet powerful diy Bluetooth speaker. And its very easy to make , I had uploaded all possible pictures of the process please go through all images provided and fell free to ask any doubts.
The dimension of the speaker is: 11 cm length ,7 cm height ,5.5 cm width and weighs just around 300gm which is very handy and portable.
They are 3W+3W speakers with heavy sound and powerful bass compared to its size
The best part is the bluetooth range of this speaker up to 30ft (no joke) and battery backup of more than 20hrs on a single full charge (its powered by 3.7v 5200 mah cells)
Over all its a cute Little Monster. Video
You may notice there are two types of speaker that's because my amp is very powerful and my 1.5 inch speakers couldn't resist at full volume and they get blown and i replaced them with very cheap 2inch speakers.
About the speaker:
A good speaker system requires a good amplifier I had tried Pam8403 , Ns4248 these two amp never satisfied my needs as they failed to produce bass and at last I found 8002B Amplifier which is really good ,so i recommend you to use this amplifier rather Pam8403 .
Use passive radiators they serve low bass frequency , and try to fit then either bottom or back of the speaker , they produce audible bass when they are closer to the ground or wall .
Use full range speakers so that they can deliver high, mid and bass frequency and try to find speakers with larger/powerful magnets.
For this project I followed my own two rules
- Only do paint job after you cut out holes for the items such as speakers, switch,passive radiator ...
- Make the speaker airtight as possible, that's why I chose airtight container
To follow this rule I had to eliminate few options such as volume control, Aux option , micro USB charging ...
If there's any air leakage the speaker may produce annoying air leaking noise and may affect tight bass.
Umm and that's it Let's get started!!
Step 1: Parts & Materials
Step 2: Making Holes for Speakers
- First know your speaker dimension
- And draw the markings
- Cut out the marked area. make sure to sand down all the plastic burrs afterwords
I heated up a knife and made it to red hot then slowly made the cuts .
- Do the paint job.
- Now screw the speaker's into the position and apply some glue in between .
Be generous in applying glue and make sure no air escape from that gaps , the glue won't leave any marks after it dried
- Give some time to glue to dry.DONE
Step 3: Adding Passive Radiator and Switch
Do the same procedure mentioned on previous step
Step 4: Connections and Circuit
All the required circuit and individual connection are provided in this step