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Old 16th July 2007, 04:58 PM   #1
jaya000 is offline jaya000  India
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Default most powerful class D for car without inverter

I will like to make sub amp around 80~100W class D for car. But i need without inverter. It should work on 13.2V Dc. I am ready to hv it @1 ohm load.
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Old 16th July 2007, 05:07 PM   #2
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A www.41hz.com amp9 with all 4 channels parallelled should give you around 100 watts into 1 Ohm on a 13.2 volts supply.
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Old 17th July 2007, 01:03 PM   #3
jaya000 is offline jaya000  India
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Yes. But cost will be too high.
I am looking 4 solution previously offered by probably IRF chip solution. It was giving 80W@.75 ohms. It was simple, cheap.
waiting for more solutions like this.
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Old 17th July 2007, 07:57 PM   #4
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Default Inverterless car amp

If it was easy everyone would do it. Seriously, you just cannot get enough voltage for that power level without an inverter.

There is a development concept circuit on my web site at www.schematicsforfree.mattsoft.net for what you want in the Audio section. But it is not a finished design.
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Old 17th July 2007, 08:40 PM   #5
Arx is offline Arx  Canada
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it should be doable with a low enough impedance, though your cables will all need to be ridiculously huge.

-Nick
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Old 17th July 2007, 11:50 PM   #6
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Default No inverter amp

And you'll need to find some 1/2 ohm speakers.
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Old 18th July 2007, 12:17 AM   #7
Arx is offline Arx  Canada
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probably 4 dvc woofers in parallel.

I'm not saying it makes a lot of sense, just that it's doable.

From 12v you're going to have to choose between not enough power into one speaker, or not enough power into 4 speakers.

It's probably as cheap to buy 2 speakers and build an inverter to drive them properly.
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Old 19th July 2007, 07:27 PM   #8
jaya000 is offline jaya000  India
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Dual voice coil car woofers r easily available. by just buying two speakers i can get 1 ohm impedance. Hence looking for above solution.
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Old 19th July 2007, 07:46 PM   #9
Arx is offline Arx  Canada
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It does seem a tad silly though getting 4 woofers and then having under 100W to drive them.

-Nick
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Old 20th July 2007, 06:00 AM   #10
jaya000 is offline jaya000  India
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arx,
i think u hv not understood.
I am talking of buying two woofers of dual voice coil. This can be 8 ". So i think the power 80~100W@1 ohm i require is ok for my car.
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