Sub. with full range speakers ?

if your spk specs are correct and placement is good i concur with mrmikesmail post. 24 hz is damn low, i assume that figure is the 3db down spec mentioned. a good sub will reinforce this dip which is rare in music, but, the secondary harmonics from deep bass will feel richer. if you have the $ to blow you will obviously get a low boost but if it is really worth it is up to your tastes. is your space that large?

It will ease the load on your main amp which should help with power hungry speakers.

I'd suggest only buying if you can get a full cash return after an in home trial.

In most cases it's a huge improvement. It just adds that bottom end--better foundation and the imaging in all cases I've worked with improved as well. The trick is getting the integration right. Rel in general is a good sub for doing that last bit--below 40 Hz.

Hello,
I have had subs in my main 2ch systems for the last 35 years. I have had different speakers in my systems over the years and always enjoyed the music more with subs. I prefer 2 sub instead of one.
I feel the subs add more depth, imaging and substance to the music. At the present time I run my main speakers full open and run a second pre out to a crossover to the subs.
It works for me. Good luck.
Joe Nies