300 to 500 watt @4ohms amplifier for subwoofer - diyAudio
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Old 9th August 2012, 07:52 AM   #1
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Default 300 to 500 watt @4ohms amplifier for subwoofer

Hello

I need a digital amplifier that could deliver 300 400 or 500 watts @ 4ohms for my subwoofer. distortion percentage is not very important . there is no problem for power supply. I can have access to any voltage and any power transformer.
I have built a low pass filter but i need a digital power amplifier .
thanx
please help me because i really need it. but i couldn't find any schematic diagram or PCB
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Old 9th August 2012, 08:13 AM   #2
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Hi nn20
greetings make the 900 watt amp on ucd 1200 thread it works and its simple to make no hard to get parts
warm regards
andrew lebon
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Old 9th August 2012, 08:22 AM   #3
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Thank you Mr Lebon
I wonder if it's possible for you to put the circuit here. because the topic is containing many pages and i don't know which circuit do you mentioned.

with regards
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Old 9th August 2012, 12:45 PM   #4
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Default sub amp

ucd 25 watts to 1200 watts using 2 mosfets

READ post 2174 by irvynejay its correct and tested
warm regards
andrew lebon
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Old 9th August 2012, 05:47 PM   #5
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Quote:
Originally Posted by andrewlebon View Post
ucd 25 watts to 1200 watts using 2 mosfets

READ post 2174 by irvynejay its correct and tested
warm regards
andrew lebon
thank u very much .
what about the output stage inductor. should i buy it ? or make it with core and copper wire? which type of core and what diameter of copper wire?
how much is the inductance of the inductor?
could it deliver 400 watts @4ohms by +-60 volts with 800 watts of power ?
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Old 10th August 2012, 12:32 AM   #6
Spec is offline Spec  Australia
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What about running this one bridged, Should give just enough power for your needs

Connexelectronic
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Old 20th September 2012, 06:44 PM   #7
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about 300 watts of power would be enough for my current subwoofer .

could anyone give me a circuit schematic without using gate driver ic's (IR2110 or similar ) that could provide 300 watts @ 4 ohms?
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Old 20th September 2012, 06:57 PM   #8
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about 300 watts of power would be enough for my current subwoofer .

could anyone give me a circuit schematic without using gate driver ic's (IR2110 or similar ) that could provide 300 watts @ 4 ohms?
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Old 20th September 2012, 07:18 PM   #9
AP2 is offline AP2  Italy
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Quote:
Originally Posted by nn20 View Post
about 300 watts of power would be enough for my current subwoofer .

could anyone give me a circuit schematic without using gate driver ic's (IR2110 or similar ) that could provide 300 watts @ 4 ohms?
Hi,
IR21xx why not? is perfect for a sub woofer, Also helps you to simplify the project. can guarantee that does not explode mosfet, if it is your first class d.

regards
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Old 21st September 2012, 02:41 AM   #10
paskal9 is offline paskal9  Malaysia
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if you're looking to drive a subwoofer with it, better to go with a bridged design as there will definitely be bus pumping effect.

how significant the effect will be only you could judge after powering them up and actually driving the sub with it. it's quite apparent enough in my application that i decided to bridge all my amp.

as for the design, irs900d is currently the most robust design that i've came across while keeping the parts count very low.
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