If you have many components in a closed-front entertainment console, I strongly suggest putting a small cooling fan in the back. It's very easy to cut a circular hole in the thin rear panel and mount a small, quiet ball bearing muffin fan. It makes a big improvement in component life and safety. Before I did this my digital cable box got so hot I couldn't put my hand on it; afterwards it was barely warm. Just one small fan mounted almost anywhere will be a huge improvement in a closed-front console.
