My BoomBox

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Introduction: My BoomBox

About: Hey! My name is Roey Leon, from Tel Aviv, Israel. On my free time, as a hobby of mine, I love building stuff from scratch. It always starts with a crazy idea, and then I realize that it`s too Dangerous / Una...

Hello everyone

Have you ever encountered a situation where you went with friends to the beach at night  or maybe some  friend's apartment and he had no  stereo system?

It happened to me, and it sucks! 

So , i decided to build one !    

although it weights 6.5 Kilo , You Grab it with both your  hands , put the music at Max and have the best time !


Enjoy!


Step 1: Shopping List

Materials :

1X1 meter of Plexiglas , preferable Transparent
screws & nuts - a lot!
12V 7 amp Batteries , preferred 2 for longer operation
Lepai Amp from eBay
12V Charger for the Battery -eBay
Speakers - i got the Pioneer 4.5" as Woofer / Mid-range  and a pair of Teac t20 Tweeters 
Volt-meter - ( not shown yet , but will be attached later )
Wiring for speakers
Iphone Dock
Aluminum Angles - comes in 3 Meter length - - for connecting the Plexiglas sides to each other

Tools :

Driller and electric screwdriver
Jigsaw - most important instrument - make sure you cut the Plexiglas with a refined saw (designated for steel)
Marker
Leveler
Calipers
A pair of clamps
Drill bits -  different sizes
Caliber
Tin snips + a pair of working gloves so you wont cut yourself 
Soldering iron - for the wiring
tin
Hot Glue

Time ,Patience , and lots and lots of Coffee !!


Step 2: Cut the Plxiglas

Start by planning the general size of your future to be Boombox.


Measure the inner diameter of your speakers , and accordingly mark it with the Caliber or some other ruler on the Plexiglas

Prepare the driller and and the jigsaw ,and off we go our way



 

Step 3: Cutting the Aluminum Angles

cut the aluminum with Tin snips .

* please be cautious 

Step 4: Drill Holes in the Aluminum and Plexiglas

Make sure you grab the Aluminum angles to some tight ground , only then Drill !

Use a special drill bit for metal, that way  the hole will be accurate and round , and  probably will take less time to drill.

Step 5:



after i finished the drilling , i took the Aluminum angles and attached them to the Plexiglas  with bolts and nuts




 

Step 6: Moved Forward

Continue  sawing slowly , be careful not to brake the Plexiglas ,it`s a very delicate material and it might crack easily .


Step 7: Strengthen the Boombox by Adding an Additional Middle Rib

Step 8: Prepare the Bottom .

since i plan to put two 12V batteries at the bottom , and they are heavy .we need to create a strong durable Plexiglas bottom.

I took two Plexiglas pieces , attached them to each other , drilled holes for the stand , and attached them to the sides with the Aluminum profiles

Step 9: Create an Upper Case Door , With Hinges

On top of the upper case i plan to put the Lepai amp and some Docking station for the iPhone

Step 10: Upper Look

I just put inside the Batteries in order to see if they sit properly 

Step 11: Last Steps of Drilling

before you take the Nylon off , it would be wise ( not like i did )  to finish with the Drilling . god forbids i`ll scratch it ;)



Step 12: Pealing Off the Protective Nylon of the Plexiglas

I pealed off the protecting nylon layer of the Plexiglas .

I had to unscrew all the bolts and nuts in order to get rid of the excess layers of nylon.


Step 13: Still Pealing Off

Step 14: Assembling All the Pieces Back Together

Without the Nylon

Step 15: Mounting the Speakers

Step 16: Almost Ready ...

all i need is to wire the speakers and tweeters do some  good soldering

Step 17: Hot Glue on the Tweeters

This thing sticks like charm!

At some point i decided to replace to old tweeters with a set of Teac T20 .

It was quite tricky the issue of releasing the grip of the Hot Glue from the Tweeters and the Plexiglas.

after Gooooogling for a while i found  a quick Cool way to remove the Glue

Alcohol ! 

 You just put  tiny tiny tiny little drop on the Glue and in seconds it releases it`s grip , like taking candy from a baby :)

Step 18: Soldering Ends to Wires and Connecting the Batteries in Parallel

Make sure that you did some good Soldering in here, we don`t want it to disconnect and perhaps make us some Short circuit .

I connected the batteries in Parallel in order to give me higher Amps . Total of 14 Amps
Still i will have 12 Volt direct and stable current






Step 19: Inside Look


Step 20: Charging Moment

After charging it for a few hours  ,the batteries gave me a reading of 13.2  Watts and 14 Amps

After 8 hours of playing the Boombox  i checked the Voltage with the Volt-Meter and the reading was 12.89 !!

 Amazing! 



Step 21: Done! - the Video ( HD Recommended ) - Would Love to Hear You Comments :) + VOTE

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    84 Discussions

    Thanks!
    it is actually the size of a Desktop computer ...

    I`m thinking about mounting him a pair of wheels so i can roll it over from place to place instead of lifting it ;)

    If this isn't sweet...I don't know what is! I love to see electronics made with Plexiglass. Wish I had the tools, time and patience.

    1 reply

    Thanks!
    appreciate it ;)

    Go for it , don`t waste time , invest in your self and start expressing your thoughts

    Very cool!
    Very nice looking enclosure too!

    Takes me back to my post high-school days when a friend and I used to make and sell sub-woofers, mostly for cars!

    Here is one more

    IMG_0476.PNG

    Nice build!!!

    I love that you can see the internals

    but to make it a bit more portable you should have used a like 2 of those in parallel i think you need 12v? than that would be an better option? Those car acid batteries are really heavy! but you choice =P Still a nice build!

    What is the bass like with this? By watching the video the bass almost sounds non-existent. But i assume that's just due to sound quality.

    6 replies

    your right!


    the bass is actually very surprising . it is very rich and soft and not cold and hard.

    it is all due to the Reflex port location and the middle partition , it gives the woofers a better sound

    Yep

    and the sound was rubbish/

    well at least the BASS was awful .

    you must let the Membranes " Breath " they are moving in and out , and the whole concept of Acoustics is give the sound waves the ability to move freely in the box


    either way , the sound is much better with a Reflex port \

    I've made an ammo box speaker (my profile picture) but i haven't put a reflex port on it. My problem is knowing where to put it, any ideas? i was thinking on the side of the box where the lid catch is but i don't know. There is a whole science of reflex ports, so any help would be appreciated!

    Well you are right about the science issue of those reflex ports

    to get the best sound we need to have a professional lab , with a few guys who know a thing or two about acoustics

    first i have seen already your boombox and it`s awesome!

    second , i would have make a small 3x3 reflex port between the speakers ( top side )

    or a better way - on the internal side ( where the air freshener is )
    cut a small 3x3 hole( even a 4x4 ) , put a round tube and get it to come all the way over the middle ( above the battery )

    i read an article about tubing inside a woofer box and it`s very complex , but it`s better then just making a hole.

    attached is picture

    I'm just a bit hesitant of cutting a hole as once it is cut then i can't go back. I have just ordered 2 more ammo boxes so maybe i'll transfer the guts into that one and put a port on it. I'll let you know how things turn out!