after reading what you said i got quite interested in the actual ranges of such instruments as the kick drum, bass quitar, piano, etc

here is a chart showing the standard freq. ranges of some of these instruments
http://homerecording.about.com/libr...hics/frqpno.gif
of course these will change to compared to what the instrument is tuned to
i also have one of classic instruments if you would like it

as you can see that 70 is not even close to "below" the freq. range of those you stated
i side with you when you pointed out that this is pretty decent for movies, that i agree however music..no
i have about 300 mp3z ranging from hip hop, r&B, metal, rock, classic and from these a sub tuned to 45hz can only properly represent about 70% of the songs not one of them being a "bass" track..the closest to these would be pieces like 3-6 mafia and other bassy groups
this conclusion was based off having a 10" ported sub tuned to 44hz in a 1.50 cuft enclosure with about 17 sq. in of port area getting 200 watts of power..this setup could not represent quite a few songs i have(this was solved by changing the enclosure to a 1.65cuft net with 14sq of port tuned to 35hz) so from what i've gather from using different setups including computer selections..i'd want atleast 40-45hz from my sub, which btw even 50$ setup of 4.1 do

but then again is when it comes down to it is this setup really worth 200$?...the soundcard's "features" seem to be quite lacking..only thing noting surround features is "WinDVD Software Q-Space Tech, Transforms Stereo Sound Source to Multi-Channel Sound. Great for Multimedia, Gaming, Presentations & Karaoke
" which seems to be similar to a dolby pro-logic setup or logitech's M3d decoding
givin the speakers power and size..they would be in the 100$ range..and allow this "built-in" soundcard 100$ in cost...these speakers would get their A$$ kicked by most speakers even in the sub 80$ range
and from the specs noted on their site..this "built-in" soundcard is not worth the 100$

hope this look run on sentence here isn't to hard to understand

oh ya btw, any 5" speaker in caraudio that can't perform down to 90hz free air isn't worth having
poping any 5" speaker into a small enclosure should yeild a good 75-80hz

thx