Why I'm not adding a sub to my 2-way monitors for music

I own stand mounts as well as floor standers ,and by asd8ng a subwoofer - A Quality one ,two even better more even bass , the bass fundamentals just donot effect the low frequencies ,but also up into the lower midrange .

when setup properly the music as a whole is much more substantial as music 

as a whole .i  have been into audio for a long time and owned a Audio store fir 10 

years  and have had the opportunities to compare most every type of Loudspeaker type ,and setup in rooms . Whst ever you do is totally up to you ,but there is ample proof out there 1-2 subwoofers of respectable quality is a win win ..

svs 3000s has a great app to find tune your system , JL  Audio,  Rel , Kef , and several others are verygood.

Well obviously this is your opinion and your room with your speakers.  It may work for your system but that in no way guarantees the dame result for someone else.  Lately I have been reading too many opinions, etc., that are somewhat useless for other people's systems.

Happy Listening.

Adding subs is always an improvement if crossed over right. But each person has to decide if the cost, space and complexity is worth it to them. 

You're right. Everybody's situation is different, and the type of sub makes a difference, too. In my small 2.1 setup I use a 300w RMS 8" sealed sub that has substantially improved the sound of every bookshelf speaker I have tried.  It doesn't hurt that it has a rare high pass filter on the high level outputs.

I just added an SVS Micro 3000 to my Harbeth M30.1 based system.  Its certainly filling in space I knew I was missing.  My listening area is the right side of a 27 x 13 room and is pretty well damped.  

I can see how setting up a sub could be a PIA.  The SVS app on my android phone allows for tweaking in almost real time.  For my purposes I set the sub to "kick in" at 51hz and the volume setting at -28.  Most of the other settings I've left alone for now.  

I'd love to find an android app that can help with room measurements from my sitting position.  Any of you guys (or gal) know of an app that might be suitable?