ghetto blaster

lejaybo · 17th March 2009, 10:33 PM

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

teherrorofdoom · 18th March 2009, 03:53 AM

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

star882 · 18th March 2009, 04:22 AM

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.

lejaybo · 18th March 2009, 07:46 AM

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

Stuey · 18th March 2009, 10:02 AM

Too much? Check this...!

The Boominator - another stab at the ultimate party machine

benchtester · 18th March 2009, 10:05 AM

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.

AndrewT · 18th March 2009, 10:34 AM

for battery operation use high efficiency speakers.
8ohm >=96dB/W/m or 4ohm >=96dB/W/m>=99dB/2.83V/m

Rainwulf · 18th March 2009, 10:42 AM

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.

johnr66 · 18th March 2009, 10:54 PM

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.

lejaybo · 19th March 2009, 07:47 AM

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 ?

17th March 2009, 10:33 PM	#1
lejaybo diyAudio Member Join Date: Jan 2009	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

18th March 2009, 04:22 AM	#3
star882 diyAudio Member Join Date: Mar 2007	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. __________________ "Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!

18th March 2009, 10:34 AM	#7
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	for battery operation use high efficiency speakers. 8ohm >=96dB/W/m or 4ohm >=96dB/W/m>=99dB/2.83V/m __________________ regards Andrew T.

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18th March 2009, 07:46 AM	#4
lejaybo diyAudio Member Join Date: Jan 2009	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

18th March 2009, 10:02 AM	#5
Stuey diyAudio Member Join Date: Mar 2006 Location: Perth, Western Australia	Too much? Check this...! The Boominator - another stab at the ultimate party machine

18th March 2009, 10:42 AM	#8
Rainwulf diyAudio Member Join Date: Feb 2009	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.

18th March 2009, 10:54 PM	#9
johnr66 diyAudio Member Join Date: Mar 2009	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.

19th March 2009, 07:47 AM	#10
lejaybo diyAudio Member Join Date: Jan 2009	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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