[mikeeastman]

I don't know if this is the right place to ask this but here it is. I'm building a class d amp with tube buffer on the same chassis, which will be made of wood and sandstone. i am lining the box and placing dividers between components  with copper sheeting and was wondered if a layer of either aluminum or steel sheeting would help or just be over kill? Also as I'm new to all this any suggestion on any part of build would also be appreciated.

[wushuliu]

I'm sure some would say there's no such thing as overkill when it comes to shielding. My thoughts would be that the copper sheeting should suffice and any additional shielding could be focused on the signal wiring. But also may depend on which amp you are building and if you using a SMPS power supply as well. There are class d amp modules like the TA3020 that are known to be very sensitive and do need as much shielding as you provide, but the classdaudio amps on the other hand are fine in a simple wood enclosure.

[mikeeastman]

Thanks, it is a classd audio SDS 254 amp and I'm using the 12v power supply as my whole system run off batteries. What kind of shielded wire would you recommend?

[wushuliu]

Thanks, it is a classd audio SDS 254 amp and I'm using the 12v power supply as my whole system run off batteries. What kind of shielded wire would you recommend?

Then you should be okay. As far as shielded wire options, that I don't know much about - never needed them. Hopefully someone will offer suggestions or better yet ask in the classdaudio mega thread in cheap&cheerful...

[Steve]

May I suggest checking if any RF is leaving via any leads, whether power supply or jacks (using scope etc).

Cheers.