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Class D Switching Power Amplifiers and Power D/A conversion

Safety GND question Amp6 basic
Safety GND question Amp6 basic
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Old 4th November 2008, 07:52 PM   #1
sts9fan is offline sts9fan  United States
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Default Safety GND question Amp6 basic

I just put together a amp6 basic. It uses a wall wart and a round dc plug. Is it possible to ground the chassis or should i not worry about it? i guess i should at least get plastic standoffs.
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Old 4th November 2008, 08:16 PM   #2
albin is offline albin  United Kingdom
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Default safety earth,not sure

Good question.Do you have 3 pin plugs in USof A .wire a seperate earth wire to a pin & plug it in to the wall,connect to chassis.Anyone else correct me.important stuff.
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Old 4th November 2008, 08:16 PM   #3
infinia is offline infinia  United States
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As long as the wall wart has safety markings i.e. UL CSA etc, and is under 24V (SELV) your good to go. An input fuse would be a good idea anyway.
Ground is mainly provided for safety. If you have EMI RFI, ground loops, then a good filtered barrier strip might be an idea.

edit> hopefully the DC input has some EMI filter/s on the amp?
Switching amps are sources of noise so conn to grounds would make other things worse, unless you have very elaborate real earth grounds.
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Old 4th November 2008, 10:55 PM   #4
Saturnus is offline Saturnus  Denmark
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We're talking very low voltages here, around 12 volts, so it really doesn't matter. The AMP 6 BASIC has an input fuse already on the board, and there's basically no way you can damage them if you soldered everything in right.

Sturdy little buggers. I used mine on festivals where you in the mornings could see dew dripping off the board it was so damp, and the sound was still perfect.
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