Should I bother to try a subwoofer?


My speakers are listed as going down to 40 HZ (Dynaudio 1.3 MkII monitors).
There is an REL Strata III available locally that I might snag, try out and re-sell if I don't like/need it. My question is this: since I would not be using this for movies, do I even need this? I mostly listen to classical music, more chamber than symphonic, and occasionally listen to rock, jazz and other pop styles.

Am I likely missing something without that lowest octave? I'm thinking that 99% of the time the sub might not even be in use if it kicks in at 40 Hz.

Any comments, purely theoretical or from experience, will be welcome.
128x128tostadosunidos
Tostadosunidos, what you will find pretty amazing is not the lowest octave, but the amount that your soundstage will open up with more air around all the individual players on the stage. When I shut off my subwoofers, I use a pair in my system, my soundstage collapses and everything sounds so much flatter. As mentioned I use a pair , however I believe you will get the same results using one.
I am not a big fan of subs for music, your Dynaudios are a very fine speaker that would not benefit from the addition of one.

for those watching TV and need to reproduce the exploding gas truck it is a different story.
Yes, you are missing something, especially with classical music. Try a sub, but don't cross it over too high, and don't turn it up too loud. If your monitors are rated down to 40 Hz, try crossing over at 45 and 50 Hz. With good recordings and good components, you will hear and mostly feel exactly what you are missing.
If you were thinking of buying any other subwoofer besides a REL the results would be questionable, but REL subwoofers don't sound like subwoofers. A REL will produce clean musical bass that will complete your system. You won't believe what you've been missing. Granted, your Dynaudios may be rated to 40Hz, but those little mid/woofers just don't move much air.

You've got nothing to lose. If you don't like it REL's are easy to sell. I say go for it.
Try the REL subwoofer, as I did (with a REL Stentor). I think you'll be favorably impressed with the bottom octave as well as the improved soundstaging (as stated very well by Teajay). If you don't like the change, there are lots of folks who like the REL, and you could sell it easily if it's in good shape. By the way, I'm a music-only listener.