2ammon speakers box 2

8/21/2019 2Ammon Speakers Box 2

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Ammo box speakers
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4/23

Hi all! As the title suggests I'm doing this instructible on ammo box speakers! I

came across this instructible > http://www.instructables.com/id/Ammo-Box-

Speakers-1/ a good few months ago now, and this gave me all the

ideas/concepts/designs to give me courage to build my own. I suggest you check

out that instructible first just in case i miss anything out (the comments wereespecially helpful!) :)

I thought I'd tell you a little bit about myself as this is my first instructible.

Name :- William Roberts

Age :- 18

Bio:- I am a student currently studying Design and technology: graphics products,

physics, maths and geology. I absolutely love DIY ideas and i am very

appreciative of design influences. I love the great outdoors and i regularly

participate in sports. I also love the occasional extreme sport (mountain boarding

most notably). Live in the UK, you could probably guess that since i quoteeverything in .

well now that introduction is out of the way i'll get on to the 'ible!

Step 1: Parts and Tools
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6/23

On this build i wanted to keep the costs as low as possible but without sacrificing

quality. To get it as cheap as possible this meant shopping around on the internet

(Ebay especially!). Due to keeping costs down i did buy some stuff from China so
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7/23

this greatly increased waiting time in order to build. so, on with the parts list!

1)Ammo box - 12.73(Ebay, price has gone up) http://www.ebay.co.uk/itm/50-

Cal-Ammo-Box-Genuine-Army-NATO-Surplus-Tool-Box-Military-Metal-Storage-

EMPTY-

/251185389448?pt=UK_Collectables_Militaria_LE&hash=item3a7bd0df88

2)Speakers - 28.99(incarconnections) http://www.incarconnections.co.uk/4-

inch-10cm-car-speakers/blaupunkt-gtx-402-sc-4-inch-10cm-100mm-in-car-

speakers-2-way-coaxial-140w.html

3)Battery pack - 2 http://www.ebay.co.uk/itm/New-8X-AA-battery-holder-

battery-case-DC-12V-battery-box-with-wire-lead-

/390442532128?ssPageName=ADME:X:RTQ:US:1123

4)Mini 12v amp- cost me 2.50 in an auction from this

sellerhttp://www.ebay.co.uk/itm/230636408043?ssPageName=STRK:MEWAX:IT

&_trksid=p3984.m1423.l26495)Panel mount 3.5mm jack-

2.48http://www.ebay.co.uk/itm/200822445403?ssPageName=STRK:MEWAX:I

T&_trksid=p3984.m1423.l2649

6)Rubber feet - 1.78http://www.ebay.co.uk/itm/Square-Self-Adhesive-Rubber-

Feet-10mm-x-2-5mm-high-

/190739998572?pt=UK_BOI_Electrical_Components_Supplies_ET&var=&hash=i

tem2c68fd676c

7)3.5mm to 3.5mm jack - 1.98http://www.ebay.co.uk/itm/3-5mm-1-8-jack-

Male-audio-aux-to-male-M-M-Retractable-Extension-Cable-for-mp3-

/170933865858?pt=UK_Computing_Sound_Vision_Audio_Cables_Adapters&hash=item27cc73cd82

8)Batteries! (wouldn't get far without these!) bought at Cost-Co pack of 48

for about 5

9) on/off switch -

3.84 http://www.ebay.co.uk/itm/130431853243?ssPageName=STRK:MEWAX:I

T&_trksid=p3984.m1423.l2649

10) Panel mount Female DC connector -

1.38 (ebay) http://www.ebay.co.uk/itm/300826668342?ssPageName=STRK:ME

WAX:IT&_trksid=p3984.m1423.l2649

11) DC connectors (ebay) 1.48 x2 -http://www.ebay.co.uk/itm/310403522222?ssPageName=STRK:MEWAX:IT&_trk

sid=p3984.m1423.l2649

Total= 65.64 (with loads of extra batteries!)

Add i t ional i tems (improv ements)


8/23

12v deep cyc le battery 9Ah - (ebay) 17

12v battery c harger (just a cheap one) - 7.90 -

http://www.ebay.co.uk/itm/221162894590?ssPageName=STRK:MEWAX:IT&_trk

sid=p3984.m1423.l2649S

Some decent wire 1 (1m).

spade connectors 1 for 10 (local store)

extra 26.90

TOTAL COST OF MATERIALS = 92.54

(i could have reduced cost by using cheaper speakers or getting the right battery

to start with)

Tools used

1) Cordless drill with appropriate drill bits (2,3,10mm metal drill bits)

2) Jigsaw

3) Round metal file

4) Scissors (wire strippers would be better!)

5) Electrical tape

6) Towel (not nessesary, just used to protect table)

7) Quick-grip bar clamp

8) Small flat head and Phillips screw drivers

9) Bit of wood (see later)10) Hand saw

11) EAR AND EYE PROTECTION. This is vital! I started cutting without these

and i got hit around my eye multiple times from metal fragments. And the noise is

deafening. You've been warned.

12) Compass (for marking out)

13) Pencil/marker pen (or even a nail, works just the same)

14) Dustpan and brush!

15) rotary tool (Dremel) with grinding tool to remove some burrs

Things I should of used

1) Wire strippers

2) Soldering iron and solder


9/23

3) Spot light (or just better lighting in general)

4) 20mm metal hole borer (would have been a lot easier and neater)

Step 2: Preparation

Before i go into the main part of this instructible i'll just give you a rough time

guide. All times will be slightly exaggerated ;)
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10/23

1) Marking out - 10 min

2) Setting up - 20 min

3) Cutting and filing - 1hr 30 min (take your time on this!)

4) Circuitry - 30 min

5) Mounting - 15 min

6) Cleaning up - 20 min (I got metal filings EVERYWHERE! plus you need to

put the tools away)

7) Testing - 999999999999 min (well maybe not, but you need to give plenty

of time to admire your work :) )

Obviously some people will do this quicker than others so don't take these times

as set guidelines. If you do it slower who cares, you'll still get there in the end!

So here we go!

Marking out

The way i did this was... placed the speaker grills where i wanted them, traced

the outline in pencil, found the middle using the compass, center punched the

middle, set the compass to 93mm (size of speaker mounting hole) then draw the

93mm circle. This will give you the hole you need to cut. For the on/off switch,

3.5mm jack and external power just draw the circles you need to cut out in the

appropriate place.

Step 3: Wiring
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14/23

My knowledge of electronics is very limited so i did refer to Google quite a few

times!

I thought this would be the hardest part due to my lack of electrical knowledge

but this was the easy part! As you can see from my parts list I've gone for easy

connectors (screw terminals and crimp connectors) as my soldering iron broke

and gave me a nasty electric shock last time i used it.

Parts needed

Battery pack
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15/23

on/off switch

Mini amp

Small amount of electrical cable (I just cut some off the battery pack)

Batteries

Panel mount 3.5mm jack

3.5mm to 3.5mm jack

Just to be safe (to test the system)

Speakers and speaker cable

mp3/phone for music

This part is best shown with pictures.

Step 4: Cutting
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18/23

This is by far the longest process. Make sure you have all your tools ready for

this step.

Make sure you wear eye and ear protection!

support the box with a bit of wood (see pictures).

Drill a starter hole, then jigsaw your way around the markings.

Step 5: Mounting
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19/23
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20/23

There's not much to say with this really, just follow the instructions on the

speakers and use your common sense!

I still haven't secured my amp to anything because i don't know where to put it

but it seems to be fine loose in the box.

Step 6: Turning up the volume!
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21/23

The fun part! Just don't do this late at night ;) Pick out your favourite song, plug

the mp3 player in, turn speaker on (make sure lid is closed) and press play! Don't

put it on full volume straight away! gradually increase... Enjoy! :)

Easily fills a sports hall with music! I even use it instead of my home stereo

system!

Step 7: Overview
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22/23

Ok so I've thoroughly tested this and these are my findings.

Firstly, i never needed to buy the AA battery pack. The 12V sealed battery i

replaced these with lasts 75 hours (being played at 60% volume)! For all the

people who think that is a crazy amount of time, it is. Your standard electrical

equations do not work with this system because of the deep cycle battery. Usingsome basic formulae (V=IR , P=VI etc...) i worked out that they should only run

about 15 hours when being played at 25% volume. After doing some research

into this I found out about the Peukert effect. Honestly i still don't fully understand

it (not even my physics lecturer could), but if anyone could explain it well then let

me know!

Charge time is roughly 8 hours.

Secondly, this weighs a tonne ( well not quite). So don't drop it ( i have on

multiple occasions and there is a few dents to show for it) the battery itself

weighs about 2.7kg.

Thirdly, there seems to be some feedback in the system (but only when i

plug a 3.5mm in) I think it could be that the cable is cheap but i'm open to

suggestions!

lastly, don't bother screwing around with a bass port. It sounds SO much
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23/23

better closed.

If you want any more detail or if i have any mistakes just comment below!

Thanks for looking! and if you wouldn't mind voting for me i wouldn't say

no ;)

EXTRAS

I did try a Lepai amp in this set up but it drew too much power. It would only last

around 18 hours on a full charge! the Lepai is a lovely amp but not for me.

The paracord handle makes it nice to carry and i think it makes it look better.

I have considered painting it, but i love the original look too much!

I have also considered a folding solar panel (in the process of testing it on a

smaller scale (only 5v)). So depending on how that goes, i may end up charging

from solar!I did use this system with the AA battery pack i bought but the battery life was

only 2 hours when being played at 50% volume. Pretty disappointing considering

the deep cycle battery lasts 75 hours easily.

2ammon speakers box 2

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