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Old 6th December 2001, 01:51 AM   #1
lpoht is offline lpoht
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Hi, I've been reading the site for a while, just trying to see what people have been up to as far as DIY audio. Lately, I've been idly thinking about building a subwoofer cabinet (easy) and a monoblock amplifier (hard) for my car. I figure that the amp doesn't have to be of the absolute highest quality, so this ought to be a good way to get started in DIY. Anyway, I was wondering how difficult and expensive building a 400-500 Watt amplifier would be. I'm going to start working on electronics, and I thought this would be a good project, if its not too expensive. This question may seem a little mundane, but thanks for your help.

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Old 6th December 2001, 07:47 AM   #2
 is offline
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Default Much easier to buy subwoofer amplifier

Don't bite off more than you can chew, unless you can find a kit somewhere.
Why do you need 500 watts?
Do you know how to solder? Do you know how to use a voltmeter? Do you know how to read schematics? Do you know resistor color code? Can you identify all the different components? Do you understand all the markings? Do you know the difference between voltage and current? Do you know the difference between impedance and resistance?
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Old 6th December 2001, 11:41 AM   #3
leroy is offline leroy
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A 500W amplifier will need a switched power supply,
I suggest: start building something else because this will end up in a complete disaster.
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Old 6th December 2001, 12:02 PM   #4
P.Lacombe is offline P.Lacombe  France
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Location: Orleans, France

A 500 W amplifier with 12 V dc supply is a complex appliance, which can be build only by experienced technicians, using generators, oscilloscopes, etc...

Regards, P.Lacombe.
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Old 6th December 2001, 12:03 PM   #5
AudioFreak is offline AudioFreak  Australia
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Switching power supplies otherwise known as PWM or Switching Mode Power Supplies are wonderful things but are not for a beginner ..... consider this ..... if you use the wrong coil the power supply usually self destructs often in an explosive manner.
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Old 6th December 2001, 08:30 PM   #6
Kilowatt is offline Kilowatt  United States
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Location: Harlowton, MT, USA
Car amp power supplies are not worth building. I've all but given up making a 600W (200 x 3) car amp, even though the amps would be easy to build, because of the switching supply. Getting a supply for a 500W amp from 12V DC is no easy task, I must warn you. If you can get at least the power supply in a kit or something, you'd be good from then on. You can probably find a 500W amp project somewhere on the internet. Tripath has powerful integrated amplifiers (up to a few 100 watts on a chip) and class T drivers for projects up to 1kW. (fancy digital amps)

I'm doing better on my 7200W amp that plugs into AC. It's easier to do even that than a switching supply for a beginner.

[Edited by Kilowatt on 12-06-2001 at 03:32 PM]
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