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Class D Switching Power Amplifiers and Power D/A conversion

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Old 6th January 2015, 04:44 PM   #1
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Default 250 Watt class D on DX.com

While looking on DealeXtreme - Cool Gadgets at the Right Price - DX Free Shipping Worldwide I came across these:
250W Mono High-Power Digital Amplifier Board - Blue (Dual DC ± 42-± 58V) - Free Shipping - DealExtreme

Wondering if they would be any good
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Old 6th January 2015, 09:51 PM   #2
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there are range of power supply voltage, from 43v to 58v, +0-
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Old 9th January 2015, 05:07 PM   #3
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I might buy one and see how they sound... only $30. Can't be any worse then the L25D from ljm that cut off at half power on 6Ohm loads
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Old 11th January 2015, 07:23 AM   #4
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these are all the same IRS2092 design from many suppliers from ebay, aliexpress etc. hard to tell who is the real manufacturer.
you can also find one with relay protection and rectifiers and caps. these have slightly beefier output switches
Assembled IRS2092 Top Class D Power Amplifier Digital AMP Board Dual Rectifier 350W 700W free shipping-in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group
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Old 11th January 2015, 09:11 AM   #5
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Ebay has them too. Nice black pcb, looks like the same layout but different components. Even cheaper at ~21usd delivered. 50V PSU is recommended, which will probably be quite a bit more expensive than the amplifier.

IRS2092 Class D Mono Amplifier Amp Board 200W IRFI4019 | eBay
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Old 11th January 2015, 01:10 PM   #6
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Thanks both of you for the heads up.
I have a 500 watt transformer 36-0-36 AC that would work with the black ones on ebay.
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