I'm official now!

[Cherian]

If I’m not mistaken RF frequencies are 100 kHz and higher. Much too high to be picked up by human ears and way too high for any amp to amplify. Most amps only go as high as 40 kHz. If one is looking to suppress EMI twisting the positive and negative leads around one another is a good idea. This will give you common mode cancellation.

 

[lugano]

If I’m not mistaken RF frequencies are 100 kHz and higher. Much too high to be picked up by human ears and way too high for any amp to amplify.

Sure Cherian, but when at the heart of your system you've got a PWM Amplifier as I do, you're a bit more concerned about RF than the rest of the folks...

 

[Cherian]

High speed switching amps, hmmm. I don’t know much about its EMC immunity. Looks like I have some good reading to do over the next few weeks.

Thanks for giving me something to think about.

 

[lugano]

Looks like I have some good reading to do over the next few weeks.

Thanks for giving me something to think about.

A nice article to start with is to be found here:

http://sound.westhost.com/articles/pwm.htm