Build a Bluetooth Boombox Speaker
Plan, Canvas And Gather Information:
Before you go crazy on shopping spree. Be sure to read more articles in the net, canvas more about their prices, read more reviews and take a lot of consideration in selecting brands. I'm a practical kid, I try to buy things worth my budget.
Speaker Drivers:
To start off, Parts Express (online site) is a great source for speaker sales. Brands that I recommend buying are Dayton, Focal, Fostex, Seas, Tang-Band & Zalytron.Try to find speakers that can reach a wide range of frequency. For woofers, a frequency response of 60Hz - 6kHz are good to start with. A frequency response of 200Hz - 6kHz for midrange speakers and 4kHz - 20kHz for tweeters.Remember that the human ear can only hear 20Hz - 20kHz of audio frequencies so don't get excited if you find speakers that can go above or below the audible frequencies, it would be a great impracticality.
The Crossover:
Audio crossovers are a class of electronic filter used in audio applications. Most individual loudspeaker drivers are incapable of covering the entire audio spectrum from low frequencies to high frequencies with acceptable relative volume and absence of distortion so most hi-fi speaker systems use a combination of multiple loudspeakers drivers, each catering to a different frequency band. Crossovers split the audio signal into separate frequency bands that can be separately routed to loudspeakers optimized for those bands.As much as possible go for the bessel or linkwitz type of passive crossovers. They are the most common type of crossover filters, it has been and will always be the trusted and safest.
Enclosures:
There are two commonly used speaker enclosures, one is the ported and one is the sealed. The sealed enclosure is perfect for small speaker enclosures, it dampens the sound given off, resulting to a punchy sound rather than the woofy effect. The cons: is that this design will require a 100% airtight enclosure for it to be effective. The ported enclosure is only ideal for large speakers (+ 6.5 inch").
Here's a list and link of all the things I used to make this project. Some of the links below are just alternatives since I bought most of the materials locally. I still recommend sourcing your local shops ans suppliers for cheaper and better parts.
Finally got to work with BANGGOOD.com! I've been buying a lot of from them ever since. They offer a lot of cheap quality electronic kits and components! They also offer fast free shipping and have a great customer service! Now, they're now one of my official sponsor. Yay!
If you are instrested in sponsoring me with my projects, instagram, YouTube channel and Instructables; feel free to contact me in my contacts below. We can make arrangements for endorsements and sponsorships. I barely charge anything, as long as you provide me with the components.
Most modern day appliances use Lithium batteries inside them mostly because Lithium batteries have a high energy storage to size ratio. This means, you get to store a lot of charge in small packages of rechargeable batteries.
For this project I used 18650 Lithium-Ion batteries. They're cheap, common and safer than Lithium-Polymer batteries. 18650 batteries are also called vape batteries. If you opt not to order online, just go to your local vape shop and you will be able to find a lot of these.
The bluetooth amplifier board that I used in this project requires an input voltage of 8v-25v, this means we need to put together at least three of these batteries in series which will give you 11.1v of power. We have to anticipate the voltage drop everytime the boombox discharges so to be safe, I used a 4 cells of lithium batteries (four 18650s in series).
This is a basic unprotected setup. It requires a monthly balancing in charging. If you have an advanced know how in electronics, I suggest adding a Li-ion balancing circuit protection board to prevent the cells from having uneven charges. This will reduce the risk of Lithium battery fire and explosion incidents.
Your parts may vary form mine, depending on your selection of materials. You'll have to use a ruler and a vernier caliper to acquire the measurements of the parts that you have. After you do this, write them down on a piece of paper, you'll be needing them in the enclosure designing step.
Building good speakers require a little tad of engineering. You don't just put speakers on a box. If you want to get the most out of your speaker's specs, you'll have to design a special speaker enclosure in accordance to your speaker driver's datasheets.
Using mathematical formulas are inevitable, but most of us are unfamiliar with them right? Yes! Here's a link of an online calculator app that will automatically solve for your enclosure dimension needs. It also comes with instructions and explanations on how to use it.
Build a Bluetooth Boombox Speaker
Plan, Canvas And Gather Information:
Before you go crazy on shopping spree. Be sure to read more articles in the net, canvas more about their prices, read more reviews and take a lot of consideration in selecting brands. I'm a practical kid, I try to buy things worth my budget.
Speaker Drivers:
To start off, Parts Express (online site) is a great source for speaker sales. Brands that I recommend buying are Dayton, Focal, Fostex, Seas, Tang-Band & Zalytron.Try to find speakers that can reach a wide range of frequency. For woofers, a frequency response of 60Hz - 6kHz are good to start with. A frequency response of 200Hz - 6kHz for midrange speakers and 4kHz - 20kHz for tweeters.Remember that the human ear can only hear 20Hz - 20kHz of audio frequencies so don't get excited if you find speakers that can go above or below the audible frequencies, it would be a great impracticality.
The Crossover:
Audio crossovers are a class of electronic filter used in audio applications. Most individual loudspeaker drivers are incapable of covering the entire audio spectrum from low frequencies to high frequencies with acceptable relative volume and absence of distortion so most hi-fi speaker systems use a combination of multiple loudspeakers drivers, each catering to a different frequency band. Crossovers split the audio signal into separate frequency bands that can be separately routed to loudspeakers optimized for those bands.As much as possible go for the bessel or linkwitz type of passive crossovers. They are the most common type of crossover filters, it has been and will always be the trusted and safest.
Enclosures:
There are two commonly used speaker enclosures, one is the ported and one is the sealed. The sealed enclosure is perfect for small speaker enclosures, it dampens the sound given off, resulting to a punchy sound rather than the woofy effect. The cons: is that this design will require a 100% airtight enclosure for it to be effective. The ported enclosure is only ideal for large speakers (+ 6.5 inch").
Here's a list and link of all the things I used to make this project. Some of the links below are just alternatives since I bought most of the materials locally. I still recommend sourcing your local shops ans suppliers for cheaper and better parts.
Finally got to work with BANGGOOD.com! I've been buying a lot of from them ever since. They offer a lot of cheap quality electronic kits and components! They also offer fast free shipping and have a great customer service! Now, they're now one of my official sponsor. Yay!
If you are instrested in sponsoring me with my projects, instagram, YouTube channel and Instructables; feel free to contact me in my contacts below. We can make arrangements for endorsements and sponsorships. I barely charge anything, as long as you provide me with the components.
Most modern day appliances use Lithium batteries inside them mostly because Lithium batteries have a high energy storage to size ratio. This means, you get to store a lot of charge in small packages of rechargeable batteries.
For this project I used 18650 Lithium-Ion batteries. They're cheap, common and safer than Lithium-Polymer batteries. 18650 batteries are also called vape batteries. If you opt not to order online, just go to your local vape shop and you will be able to find a lot of these.
The bluetooth amplifier board that I used in this project requires an input voltage of 8v-25v, this means we need to put together at least three of these batteries in series which will give you 11.1v of power. We have to anticipate the voltage drop everytime the boombox discharges so to be safe, I used a 4 cells of lithium batteries (four 18650s in series).
This is a basic unprotected setup. It requires a monthly balancing in charging. If you have an advanced know how in electronics, I suggest adding a Li-ion balancing circuit protection board to prevent the cells from having uneven charges. This will reduce the risk of Lithium battery fire and explosion incidents.
Your parts may vary form mine, depending on your selection of materials. You'll have to use a ruler and a vernier caliper to acquire the measurements of the parts that you have. After you do this, write them down on a piece of paper, you'll be needing them in the enclosure designing step.
Building good speakers require a little tad of engineering. You don't just put speakers on a box. If you want to get the most out of your speaker's specs, you'll have to design a special speaker enclosure in accordance to your speaker driver's datasheets.
Using mathematical formulas are inevitable, but most of us are unfamiliar with them right? Yes! Here's a link of an online calculator app that will automatically solve for your enclosure dimension needs. It also comes with instructions and explanations on how to use it.
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