Page 1 of Subwoofer advice

I`m currently using my old B&W "Solid" range Powerbass subwoofer with my AV setup (Denon 2802 6.1 amp + Mission 72 speaker package). The subwoofer is 70W and frequency range goes down to 38Hz at -3dB.

How low should a subwoofer go down to, to get a good effect from movies? Some people say it should go down to 20Hz, but do many LFE signals in films reach that deep?

I was considering upgrading to a Yamaha YSTW320 which has a lot of recommendations, but its spec says that it only goes down to 40Hz, which is not far from my existing sub. Or am I missing the point somewhere?

Thanks.

Sarmad,

As far as I know, the lower the Hz the more lower frequencies you`ll capture (i.e. the Bass). I`m quite biased for going with headphones through to sub-woofers that can capture 10Hz (if it`s available of course).

BB.