12V portable soundsystem help

Bakewell · 29th October 2010, 02:49 PM

Hey guys I am trying to build a portable system as part of my HNC project that will consist of a 12V battery (possible 2 in series or parellel) that will run a couple of old technic 8ohm hi-fi speakers I have (they can always be upgraded when I have some more money) I am trying to make the amplifier pretty water resistant so I can use it for festivals, BBQs and the like

My initial idea was to run some plastic tubing around and power it with a small fishtank type pump and an external reservoir, poissibly with a PC fan inside to to control the temperature.

I have to admit my knowledge isn't that fantastic on this sort of thing, but I have spent a few days researching and have done some soldering in the past.

My question really is what is your advice, I would like to build the amplifier rather than buy it but am undecided on whether to buy the ESP project 3A or the 41Hz project 6 basic. Alternatively at the college we have access to PCB wizard and I have Express PCB, I have only briefly looked at these and found them quite difficult to grasp (only really have knowledge of multisim) oh the college has an PCB etching machine so it would cut my costs down alot.

Anyways any help/advice etc. would be much appreciated
Thanks alot

Bakewell

ampimp · 29th October 2010, 03:31 PM

How much power are you looking for ????
ian

Bakewell · 29th October 2010, 10:32 PM

I was thinking around 2x30W if you think that would be loud enough as a small outside system? Also i believe that this would run cooler than having a 60W mono amp?
Thanks alot

JMFahey · 9th November 2010, 12:07 PM

A couple TDA2005 will give you almost 20W RMS each into 4 ohms.
That's quite loud for BBQ and similar events, and just enough (with a small battery powered mixer) for a couple guys with acoustic guitars and headband mics, forget about Thrash/Punk, etc. of course.
It can be powered by a relatively light 12V7A gel battery.

29th October 2010, 02:49 PM	#1
Bakewell diyAudio Member Join Date: Oct 2010	12V portable soundsystem help Hey guys I am trying to build a portable system as part of my HNC project that will consist of a 12V battery (possible 2 in series or parellel) that will run a couple of old technic 8ohm hi-fi speakers I have (they can always be upgraded when I have some more money) I am trying to make the amplifier pretty water resistant so I can use it for festivals, BBQs and the like My initial idea was to run some plastic tubing around and power it with a small fishtank type pump and an external reservoir, poissibly with a PC fan inside to to control the temperature. I have to admit my knowledge isn't that fantastic on this sort of thing, but I have spent a few days researching and have done some soldering in the past. My question really is what is your advice, I would like to build the amplifier rather than buy it but am undecided on whether to buy the ESP project 3A or the 41Hz project 6 basic. Alternatively at the college we have access to PCB wizard and I have Express PCB, I have only briefly looked at these and found them quite difficult to grasp (only really have knowledge of multisim) oh the college has an PCB etching machine so it would cut my costs down alot. Anyways any help/advice etc. would be much appreciated Thanks alot Bakewell

29th October 2010, 03:31 PM	#2
ampimp Banned Join Date: Sep 2009 Location: coventry	Power rating ?? How much power are you looking for ???? ian

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29th October 2010, 10:32 PM	#3
Bakewell diyAudio Member Join Date: Oct 2010	I was thinking around 2x30W if you think that would be loud enough as a small outside system? Also i believe that this would run cooler than having a 60W mono amp? Thanks alot

9th November 2010, 12:07 PM	#4
JMFahey diyAudio Member Join Date: Mar 2009 Location: Buenos Aires - Argentina	A couple TDA2005 will give you almost 20W RMS each into 4 ohms. That's quite loud for BBQ and similar events, and just enough (with a small battery powered mixer) for a couple guys with acoustic guitars and headband mics, forget about Thrash/Punk, etc. of course. It can be powered by a relatively light 12V7A gel battery.

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