Is LM3875 Enclosure Venting Required?

[ransom peek]

Am building Brian GT lm3875 rev 3 in a small wood enclosure. 330 VA Avel toroid, and a substancial, shared, finned heat sink 7" x 1 1/2" x 1 1/8".

I'm not planning on any sort of venting (it is unsightly in a cherry enclosure) but could put holes in bottom, sight unseen.

Anyone have experience with this chipamp - will it generate too much heat that needs to be dissipated with ventilation? From reading the postings, my selected heat sink ought to do a fine job given a reasonable ambient temperature, but... the issue is where does the heat in the enclosure go?

[mhb]

Ransom:

You'll be fine if the heatsink is mounted externally. If the heatsink is enclosed, all bets are off.

cheers,

m

[ransom peek]

OK, small wood enclosure, no venting, heatsink exposed to outside.

How about that big old 330va Avex toroid poer tranny - does it need venting? Does it get hot?

[sivan_and]

Some vents on the bottom plate/chassis toward the front end and some vents on the back...will create an airflow towards the back from the front side...