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Old 27th January 2007, 11:50 AM   #1
v-bro is offline v-bro  Netherlands
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Default Portable sound system gallery...

Hi,

I figured class D would be used by many for portable applications. I built a small sound system for a friend who rides with it on his bicycle.

He sent me a picture that inspired me to open up a gallery.

Feel free to post your pictures with a nice 'on the road' feeling or pictures of your portable system!

This system uses 41hz.com AMP32, two Visaton FR7 (for now...), a Transcend T-sonic 610 (the 620 is out and is supposed to sound even better, though I can't imagine...) and a 6A Nicad battery in the bottleholder... The system runs for about 25 hours (much longer than the T-sonic..) at full power...

Love to see some of your pictures!
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File Type: jpg bikesound3.jpg (93.3 KB, 1748 views)
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Old 27th January 2007, 12:04 PM   #2
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V-Bro,

Again totally cool and also a bit bizarre.
Your cycle-audio friend does not live in The Netherlands or else never leaves his bike within spitting distance?
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Old 27th January 2007, 02:44 PM   #3
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On a second look, it doesn't look like an audio equipped bike at all but more like something to blow up stuff with. I bet he can't get near the Binnenhof with this vehicle :-)
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Old 30th January 2007, 05:10 AM   #4
Xspunge is offline Xspunge  United States
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I hope that is a Flash based MP3 player...nothing like constant jarring hits on a MTB to destroy a hard drive... but it is a cool system.
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Old 30th January 2007, 11:16 PM   #5
v-bro is offline v-bro  Netherlands
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Hahah, thanx, the system can be detached pretty easily and it IS a flash MP3 player (there's a 4gb version out now, but this one is 2gb).

I have a Marrocan friend, cool guy...walked into my appartement one day and -as he's quite a humoristic guy- he took two of my bottle batteries in his hands and said he'd never get even near schiphol (amsterdam airfield) with those...

I'm going to upgrade the system with lower weight batteries, lighting system, phone charge, usb connection, solar panels (flexible ones!) voltage meter and waterproof speakers in the near future....
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Old 31st January 2007, 07:45 PM   #6
v-bro is offline v-bro  Netherlands
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Well, anyone got some nice on the road audio pics? Or perhaps even street party pics?

Did the ghettoblaster go completely extinct?

Or do we have to wait until summertime....
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Old 19th February 2007, 12:11 PM   #7
pekar is offline pekar  United States
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Here's an awesome system by Buckapound-
mini boom box

Here's my system-
http://www.diyaudio.com/forums/show...106#post1137106
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Old 19th February 2007, 12:47 PM   #8
v-bro is offline v-bro  Netherlands
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whoa! looking good!

I allready made a 5V usb supply, I can listen and charge at the same time from my Transcend T.sonic 610 player.

Only problem is that sometimes I get some noise coming through, don't know what to do about this....

The link you provided doesn't seem to work, but I did find your design.
http://www.diyaudio.com/forums/showt...06#post1137106

Why Nimh batteries, are they the best value for money? I did have a look at the new 2.7A penlites, they sure are light! But perhaps Lipoly is the best choice disregarding the high price...
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Old 20th March 2007, 02:07 PM   #9
pekar is offline pekar  United States
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The NIMH batteries are an experiment. They are lighter in weight, smaller in size, and I can get a higher voltage out of them (by increasing # of cells), resulting in higher volume output.
I use 10 cells, which is over 13 volts fully charged.
The pack in the picture is 10 aa cells, it cost about $20 to make.
I have built a pack using C size cells as well which gives me 5 Ah capacity. That runs for days!
Lipos are too finicky for me to recommend to anyone else.
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Old 20th March 2007, 06:27 PM   #10
v-bro is offline v-bro  Netherlands
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Funny man! I just wanted to do the same thing, I saw 2.7A (!!) Nimh AA batteries @ conrad.nl a while ago. So I allready ordered holders for 2 AA batteries, those things cost practically nothing (0.27EUR!) to make a thing long pack out of it. I want to make it watertight with a bicycle inner tube ouround them (also 10C in series...).

Only I stumbled upon very nice regulated Lipo batteries (in hard box) and a very nice waterbottle battery with 7Ah capacity!

Look:
http://www.batteryspace.com/index.as...&Category=1069

http://www.batteryspace.com/index.as...OD&ProdID=2218

And this great deal :
http://www.batteryspace.com/index.as...OD&ProdID=2884

I suppose the supplied charger treats the cells well enough...?
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