"boom box" AMP 12 Volt

Magicdj · 2nd January 2007, 02:30 AM

I'm looking to build a portable "boom box" that is capable of producing ~110-115 SPL. Simular to the "podzuma" http://www.partsexpress.com/projects...uma/index.html
But the little T-amp is a little too small (10-15 watt) to achive those SPL's. What I'm looking for is a 12v amp that is ~30-50 watts. I'd like to know if any one sells finished amps, or if they could build one for me?

Thanks,
Mike

DcibeL · 2nd January 2007, 05:02 AM

Use a car audio amplifier?

Magicdj · 2nd January 2007, 03:33 PM

I have looked at car amps; they all are too large and heavy. There are only a couple that are Class D - full range, mostly all are subwoofer amps. I was looking for an amp I could fit into a small compartment. Any advice would be greatly appreciated.

dwk123 · 2nd January 2007, 09:25 PM

You can't do better than the little T-Amp on 12V unless you include a DC-DC converter somewhere to increase the rails on the amp. No home audio oriented amp will do this, as it would simply start with a higher voldage supply. So, any way you slice it you are probably looking at something from the car audio world.

What I'm planning for a similar effort is using an Alpine head unit that supports active tri-amping directly from the unit - (9815 maybe?) It's probably 20W clean per driver or so, but it's good enough for my needs which are far far lower than 110dB. I haven't really started this, although I do have the Alpine.

The other question I'd have is what the speaker system will be, as I can't imagine anything that can even remotely be described as 'portable' producing a clean 110dB+ level.

raintalk · 2nd January 2007, 10:16 PM

Quote:

Originally posted by Magicdj
I have looked at car amps; they all are too large and heavy. ...

The xtant 1.1i is pretty small.

The Pioneer PRS models, class-fd

, "Ice" while not as small are fairly small and light.

Pano · 2nd January 2007, 11:15 PM

dkw123 is right on all counts.

Magicdj · 2nd January 2007, 11:51 PM

That Podzuma in the "stock" form should be ~ 107 SPL. Bump it up to 30 watts per channel, now your in the area of 112 SPL.

I like that Xant 1.1, nice size plenty of power but a little pricey at $350...

I did see some other Tripath amp modules that where much higher power than the little T-amp. Does anyone know who makes a complete AMP based off a TK2050 Tripath module? That AMP shows 10-36 volt range.

lousymusician · 3rd January 2007, 12:43 AM

Quote:

Originally posted by Magicdj
Does anyone know who makes a complete AMP based off a TK2050 Tripath module? That AMP shows 10-36 volt range.

http://www.41hz.com/. See the Amp 4 and Amp 11 kits.

Magicdj · 3rd January 2007, 09:46 AM

That AMP 4 from 41 hz looks good, only problem it is aimed at someone who is skilled at AMP building. Self admittally, that's not me (with electronics at least). Does anyone have experince building this amp? Or who has one willing to part with it

Any idea what kind of power you can expect it @ 12 Volts?

Pano · 3rd January 2007, 10:09 AM

Quote:

Originally posted by Magicdj
Any idea what kind of power you can expect it @ 12 Volts?

Same as the smaller T-AMPs. 12 volts is 12 volts. It's the law, Ohm's Law.

Quote:

now your in the area of 112 SPL.

If you're in the area of 3 feet in front of it. Maybe, if you're lucky....

2nd January 2007, 02:30 AM	#1
Magicdj diyAudio Member Join Date: Jan 2007 Location: Wisconsin	"boom box" AMP 12 Volt I'm looking to build a portable "boom box" that is capable of producing ~110-115 SPL. Simular to the "podzuma" http://www.partsexpress.com/projects...uma/index.html But the little T-amp is a little too small (10-15 watt) to achive those SPL's. What I'm looking for is a 12v amp that is ~30-50 watts. I'd like to know if any one sells finished amps, or if they could build one for me? Thanks, Mike

2nd January 2007, 11:15 PM	#6
Pano diyAudio Moderator Join Date: Oct 2004 Location: North Carolina Blog Entries: 4	dkw123 is right on all counts. __________________ Take the Speaker Voltage Test!

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2nd January 2007, 05:02 AM	#2
DcibeL diyAudio Member Join Date: May 2003 Location: Saskatchewan	Use a car audio amplifier?

2nd January 2007, 03:33 PM	#3
Magicdj diyAudio Member Join Date: Jan 2007 Location: Wisconsin	I have looked at car amps; they all are too large and heavy. There are only a couple that are Class D - full range, mostly all are subwoofer amps. I was looking for an amp I could fit into a small compartment. Any advice would be greatly appreciated.

2nd January 2007, 09:25 PM	#4
dwk123 diyAudio Member Join Date: Feb 2002	You can't do better than the little T-Amp on 12V unless you include a DC-DC converter somewhere to increase the rails on the amp. No home audio oriented amp will do this, as it would simply start with a higher voldage supply. So, any way you slice it you are probably looking at something from the car audio world. What I'm planning for a similar effort is using an Alpine head unit that supports active tri-amping directly from the unit - (9815 maybe?) It's probably 20W clean per driver or so, but it's good enough for my needs which are far far lower than 110dB. I haven't really started this, although I do have the Alpine. The other question I'd have is what the speaker system will be, as I can't imagine anything that can even remotely be described as 'portable' producing a clean 110dB+ level.

2nd January 2007, 11:51 PM	#7
Magicdj diyAudio Member Join Date: Jan 2007 Location: Wisconsin	That Podzuma in the "stock" form should be ~ 107 SPL. Bump it up to 30 watts per channel, now your in the area of 112 SPL. I like that Xant 1.1, nice size plenty of power but a little pricey at $350... I did see some other Tripath amp modules that where much higher power than the little T-amp. Does anyone know who makes a complete AMP based off a TK2050 Tripath module? That AMP shows 10-36 volt range.

3rd January 2007, 09:46 AM	#9
Magicdj diyAudio Member Join Date: Jan 2007 Location: Wisconsin	That AMP 4 from 41 hz looks good, only problem it is aimed at someone who is skilled at AMP building. Self admittally, that's not me (with electronics at least). Does anyone have experince building this amp? Or who has one willing to part with it Any idea what kind of power you can expect it @ 12 Volts?

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