Introduction: Cardboard Mini Speaker System

It is a self powered mini speaker system made with packaging cardboard. The bcardboard thickness was 6 mm and with proper pasting and ribs, i got a rigid mini box. Due to high damping property of packaging cardboard, i got a good quality sound output.

Basically i made this in 2006 for my SE k750i phone, even today it is working nicely. It gives a warm tube-like sound with emphasis on vocals and satisfactory high tones.

Comments

author
dasimpson1981 made it! (author)2011-11-08

is that the tda2822m ic?

author
kuldeep1 made it! (author)kuldeep12011-11-09

ya. thats a TDA2822m running on 9V

author
dasimpson1981 made it! (author)dasimpson19812011-11-09

i have one on a bread board going into 5w 4ohm stereo speakers running of 5 volt usb load enogth with out been to load

author
kuldeep1 made it! (author)kuldeep12011-11-09

Good. How about sharing that. Later i also made a 5.1 home theater system. -http://diygainclone.blogspot.com/2011/09/lm4780-based-diy-51-home-theather.html

author
dasimpson1981 made it! (author)dasimpson19812011-11-10

still on a breadboard ill try and take a photo the idea was to make a 5.1 system for my pc just never got round to it the spekers will be full range speakers so they be no need to have a sub 1 watt each speaker i think be more then enogth volume

author
dasimpson1981 made it! (author)dasimpson19812011-11-10

after all the parts come out of a 5.1 speaker set for the pc but they was a problem with it it was not a dolby amp but yet when i connected the front speaker inputs sound came out of all the spaekers

author
kuldeep1 made it! (author)kuldeep12011-11-10

Well, if u plan for 5.1 DIY style, i will recommend TDA1554Q. its a super simple 4*20W channel amplifier chip with minimal parts. just get 2 chips and u can make amplifier for 5 satellite speakers + 1 sub in BTL mode.

author
dasimpson1981 made it! (author)dasimpson19812011-11-10

thanks ill look into that prob more then the speakers i have could handle

author
dasimpson1981 made it! (author)dasimpson19812011-11-10

here is the photo of the stereo amp tda2822m the 4 greenish resisters add up to 10k on the input lead i put 100k this limits the amp from overloading and distorting

DSC00006.JPG
author
dasimpson1981 made it! (author)dasimpson19812011-11-09

ignore that comment i just scene them hideing under the caps

author
dasimpson1981 made it! (author)dasimpson19812011-11-09

dose it work fine with out the resisters and the ceramic capaciters

author
pfred2 made it! (author)2011-11-08

How do you open it non-destructively if there is a problem inside that needs to be serviced? How are the speakers held in anyways?

Reminds me of something I did when I was in school with a paper bag that we named the musical bag. This is more elaborate than that was though. But my musical bag was easy access to internal components.

author
kuldeep1 made it! (author)kuldeep12011-11-09

Actually there is not a way to open it non-destructively. I didn't planned it that time. its a closed system. hopefully till now there is not a problem.

Speakers are screwed to a thick cardboard frame and the frame is again pasted to the main body. So i got a rigid speaker holding.

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