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Old 17th March 2009, 11:33 PM   #1
lejaybo is offline lejaybo  United Kingdom
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Default ghetto blaster

howdy peoples

i wanna make a simple ghetto blaster style portable system

doesn't have to sound the greatest but i'm looking for a simple amplifer that'll run of batteries

plus has anyone played with dab tuners?][;p
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Old 18th March 2009, 04:53 AM   #2
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im currentley working on a 2x 20 watt amp using the tda 2003 its quite cheap to make and decent sound quality i dont know what its like with regular batterys but it runs for a good time on my drill battery

anyway heres the circuit diagram for it
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Old 18th March 2009, 05:22 AM   #3
star882 is offline star882  United States
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There are plenty of hybrid digital chips designed for battery operation. Of course, pretty much all of them are SMD. But some of them are still easy to work with.
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Old 18th March 2009, 08:46 AM   #4
lejaybo is offline lejaybo  United Kingdom
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sweet i'll have a butchers

i found some old low power 8inch cheap drivers

i wonder if thats a bit too much for a ghetto blaster lol
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Old 18th March 2009, 11:02 AM   #5
Stuey is offline Stuey  Australia
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Too much? Check this...!

The Boominator - another stab at the ultimate party machine
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Old 18th March 2009, 11:05 AM   #6
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Default Re: ghetto blaster

Quote:
Originally posted by lejaybo
howdy peoples

i wanna make a simple ghetto blaster style portable system

doesn't have to sound the greatest but i'm looking for a simple amplifer that'll run of batteries

plus has anyone played with dab tuners?][;p
Parts Express has a sale on a T-amp (today only?). Sounds pretty decent and is pretty efficient.
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Old 18th March 2009, 11:34 AM   #7
AndrewT is online now AndrewT  Scotland
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for battery operation use high efficiency speakers.
8ohm >=96dB/W/m or 4ohm >=96dB/W/m>=99dB/2.83V/m
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regards Andrew T.
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Old 18th March 2009, 11:42 AM   #8
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TEA2025 is a nice simple chip that will run BTL, runs of 6-12 volts, and will put 4.7 watts into an 8ohm speaker in BTL.
Idea chip for battery operated devices.
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Old 18th March 2009, 11:54 PM   #9
johnr66 is offline johnr66  United States
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What battery type do you plan to use? What voltage?

I just got some TDA7267 ICs. After doing careful tests with my oscilloscope and function generator, I found it to deliver 1.8 watts (non clipping) into a 5 Ohm load with a 9 volt Vs. This is very good performance for a single ended output IC. It requires very few components.
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Old 19th March 2009, 08:47 AM   #10
lejaybo is offline lejaybo  United Kingdom
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cool info guys

i'm thinking roughly to use 9 to 12 volts
AA tyes me thinks, something thats easily avaiable

the best power i can get for this power is my aim

plus i know it'll sound a bit better than those plastic crapola boombox i keep seeing


anyone seen quad channel IC ?
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