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AmmoCan Bluetooth aptx speaker
AmmoCan Bluetooth aptx speaker
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Old 3rd January 2018, 01:55 AM   #11
martyparish is offline martyparish
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Join Date: Apr 2015
@H8T3R thanks for the recommendations. I ordered the amp already nice deal.

I'm probably going to use the TDA7492P that I already have for now.

TDA7492P 25W+25W Wireless Bluetooth 4.0 Audio Receiver Digital Amplifier Board Sale - Banggood.com

But it's the on-board bluetooth so range will probably be an issue. I can always switch it out later.

I'm going to use a pair of Fountek FE83 3" Full Range Driver 8 Ohm that I already own. The recommended ported volume is right on for the ammo box. Small I know, but they should be "ok".

That large ammo case project looks sweet!!! 21kg wow!

One more question if you don't mind: In project from post #7, how did you get the rolled edges on the speak holes?

Thanks!
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Old 3rd January 2018, 10:08 AM   #12
Nenola is offline Nenola  Finland
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Join Date: Feb 2008
A tip for martyparish, I your amp has hiss or other unwanted noise, you might want to check this out: How to prevent popping sound on power on on TDA7492P Amp?

I needed to bypass the opamp stage to make my amp silent.

And I might as well tell something else about that project cause I started:

-Case from an old Toshiba cassette radio (my grandad got it for his 60th birthday in 1990 )
-Low range is some cheap GGEC 640709/13448, guessing it is used in some OR speakers back in the day and they are in discount now
-Tweeters TANGBAND 13-1264S (just a cap for highpass)
-Amp TDA7492P
-Battery 4x 18650

Project wasn't as easy as I thought it was, needed to seal so many holes and add some damping matt for more rigid enclosure. Still have some minor things to do, but I say it's mostly done.
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Old 3rd January 2018, 03:29 PM   #13
H8T3R is offline H8T3R  Poland
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Join Date: Jan 2017
Dr1v3n , thanks for kind words and for your service .

martyparish ,happy to help , I've read lot's of good things about Fountek FE83 drivers , they can actually be really nice fit for the build.

I don't mind at all , so the edges of the speaker holes in mdf were rounded off with hand router. The holes in metal box were cut around 10mm smaller than those in mdf. After pressing in mdf box i used small hammer and some rounded steel rood to fold them over the mdf . I basically hammered them down till they folded nicely , minding not to damage the mdf. Next I smoothen out everything with sand paper , after that there were 3 coats of primer paint and some sanding it down, to even out surfece for the flat forest green paint.

Nenola you got some old school stuff going on there , I like it.
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Old 3rd January 2018, 03:36 PM   #14
martyparish is offline martyparish
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Join Date: Apr 2015
Thanks for the tip on the flared speaker holes. Very nice job!

I can't wait to build mine.
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Old 18th January 2018, 06:33 PM   #15
H8T3R is offline H8T3R  Poland
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Join Date: Jan 2017
A while ago I mentioned that I'm planning on adding some more weight to the speaker and I'm going to deliver on that promise by adding one more woofer ( faital pro 5fe120) , changing bass ports , making new top cover and some other cosmetic changes.

So far I have managed to install new bass ports 70mm inner diameter at the opening , I've added some 90 degree bends from pvc pipes to mix it a little bit. I have also cut some beauty/reinforcement rings from 1mm thick steel.

The small dark green plate was cut on water-jet from 2mm h17 steel and was later painted with some camo spray paint. It's meant to be a mounting bracket for the woofer.

This large green plate was cut from PE1000 , 10mm thick and it will work as a top cover. It was cut using hand router and some ratchet *** jigs, like lose a finger type deal

I'm still waiting for the woofer to arrive so TO BE CONTINUED .....
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Old 28th January 2018, 09:13 AM   #16
H8T3R is offline H8T3R  Poland
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Join Date: Jan 2017
So I finished upgrading the large speaker a while ago and it looks like this now. Aside of it getting heavier the bass is much deeper and more pronounced , depending on the room it could become overwhelming at times , off course it could be adjusted by proper knob. Overall I would say that it's a fun speaker to listen too although I wouldn't crank it up in smaller rooms .
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Old 28th January 2018, 01:58 PM   #17
martyparish is offline martyparish
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Join Date: Apr 2015
Wow that ammo can looks like a real room shaker! Very awesome!
Is the woofer mounting plate designed for rigidity or is it covering a larger-than-needed hole

Would you mind telling us the specs of the drivers and amp(s)?

By the way, I have built my ammo can as well. It's still needing some finishing touches like power switch, securing the innards and maybe some damping material. I am pretty happy with it so far. Will post up a pic soon.
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Old 28th January 2018, 02:24 PM   #18
martyparish is offline martyparish
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Here is my humble version. 50 cal ammo box with 2 Fountek FE83 and Sanwu TDA7492 amp. It's running on 4 18650 li-ion. Roughly 1.5x2.5 inch port made from cardboard tube lol.

The inner wood lining is made from snap together flooring that I had laying around. It is glued in with latex caulk. I put the wood in one piece at a time instead of building a box to fit the case.

It has decent bass for such small speakers but I already want to make another with larger speakers! LOL
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File Type: jpg jammo-can.jpg (232.5 KB, 23 views)
File Type: jpg ammobox.jpg (676.4 KB, 36 views)
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Old 28th January 2018, 02:29 PM   #19
martyparish is offline martyparish
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I forgot to mention that the Bluetooth range is terrible as expected. The source must be within ~10 feet. Also need to finish it up with some lining material and secure the hardware. Needs a power switch as well.
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Old 28th January 2018, 04:38 PM   #20
H8T3R is offline H8T3R  Poland
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Join Date: Jan 2017
@martyparish
Thanks for sharing your project with us.
Looks really nice definitely better than my first one , which was a mess cables every were and I f***ed up the cut for the bass port so I had to cover it up with the ss plate. I don't have photos from before tidying it up .

Adding some dampening should further improve the sound. I'm currently using a combination of felt and some synthetic cotton like material for the back wall , back corners and bottom lining.

So about the hole and the plate , the hole was cut to match the outer dimentions of the speaker driver which is bolted on to the plate and than the plate is glued and bolted on to the body of the box it's both a mounting point and reinforcement.

Box is using TAS5613, 2.1 Amplifier with CSRA64215 module , battery is made of 21, samsung 18650s configured as 7s with BMS board ( I don't use one shown on the photo anymore it was garbage , I changed it for better one. I'm planning to make a change for 7 liitokala 26650s 5ah each ,to make battery lighter.
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