Do you use a Subwoofer when listening to stereo?

I thought I wanted more bass in my stereo room so I grabbed the dolly and rolled my old mirage with 2 opposite side firing 12” woofers, set it between the two speakers and ran a sweep. Amazing, reasonably flat response to 20 hz. I didn’t care for the way the hvac ducts were rattling and tbh getting a stereo pair set for room gain, or when the bass is locked in 45 hz is great for 90 % of the music I play. Subs in my truck are another story.

@ Emergingsoul 

Hello It's a matter of preference I think it depends on the speakers your powering and the type of music your listening to also. I am using a set of large speakers that don't need a sub there set to full range and 2 channel is the way to go for me some others may not agree but it's what you prefer. I like to know that I can have concert level sound with just 2  good full range speakers and leave the bells and whistles off. Have a great day!

Atmasphere, I am going to disagree on this one. My experience is different but I think I might go about it differently than most. Up at the crossover point I am just listening and I do not want to hear it. The subwoofers should just disappear(remember I use a crossover point of 125 Hz). It has to sound like I am listening to one speaker. As I evaluate lower down I go from listening to feeling. Do I feel that kick drum the way I do at the club. Are those low synthesizer notes shaking me the way they should. Does the room move under low organ pedal. Hearing is one thing feeling is another. Part of the thrill of live music are the visceral sensations you get.
These sensations are missing or greatly attenuated in most home systems. I started playing around with subwoofers in 1978 for this very reason. I wanted to feel as if I were at a live performance. Again, I can now move a subwoofer 15 feet just by delaying it 15 msec. I can change crossover points and slopes on the fly at one Hz increments 2nd to 10th order. You can hear these changes immediately. It is easy to demonstrate that with everything aligned perfectly those visceral sensations come through in spades any movement away causes instant deterioration in those sensations up to completely obliterating them.
Dukes instructions represent a reasonable way to set up his system without expensive test equipment. You can purchase his system for a very reasonable price commensurate with what most of us have to spend on a system. Brilliant. Using modern resources you can however go beyond this. You just have to be willing to put in the time and money.  

drlisz, the type of music has nothing to do with this unless you only listen to string quartets. A good system will play anything equally well. If it can't it is not a good system.

I don’t get multiple subs.

waves of low frequencies are very large so the spread all over quite well.  A nice 12 inch drive does not seem to need any help in a room that’s say 15x20.  Smaller subs I guess might be spotty and maybe more than one might make sense.

Further, does it really matter where the sub is positionEd?  If I blindfolded someone and said find the sub, could you find it?