Hi Asiatic
This question comes up once in a while, I like to have mine set to large. The VP150 is good to 85 hertz. That should cover most male voices in the lower register, even James Jones (this is CNN, I'm your father Luke, etc). However I am running a sep. power amp with 150 watts. So I have plenty of headroom to handle the lower frequences for the VP150.
Others on this forum will tell you to keep it at small, and since you are using a Denon, that may be the correct thing to do. Much depends on your room dimensions and how loud you like listen to your movies.
Remember it takes more power to reproduce lower freq. then higher. Some here will even tell you to keep you mains set to small. This will put less strain on your Denon. It all comes down how much available headroom you have. The best way to improve headroom is to increase power.
pn
