Do you use a Subwoofer when listening to stereo?

@emergingsoul --

Do you use a Subwoofer when listening to stereo?

I do, very successfully, and god (or, that is: the DBA-inquisition) forbid only two of them. They're tapped horns taking up 20 cubic feet per cab, and tuned just below ~25Hz. Low-passed @83Hz, and symmetrically set up in relation to the main speakers. Smooth, enveloping and totally effortless bass.

I really think subs and surround for the home is nothing but a marketing gimmick. just distracting garbage. If I won lotto (gotta play first) and could hire a qualified team to design a system ground up using a stereo pair of speakers and subs maybe, but why not use the subwoofer/s money to get better mains? nah not even if I could do it for free.

If you are using a 2 way crossover rolling the 804s off say at 100Hz 24db/oct several things happen. You will increase the headroom of the satellite system. Essentially, it now has more power to spare.
You will drop the distortion levels of the 804's woofer. Everything else that woofer carries will be much cleaner. This all assumes at least two subwoofers adjusted correctly. Subwoofers set up incorrectly will more than likely make things worse. Unfortunately, in most systems subs are set up by trial and error. Then you have to deal with room acoustics which sub performance is very sensitive to. This is an important reason why multiple subs are required. I and others seem to have landed on 4 subwoofers as optimal. Ideally, you have digital control of crossovers, EQ and time and phase alignment. You measure the sub from several points in the room and overlay the curves. Peaks or troughs present at all locations are due to the subs performance and need to be corrected. Those that vary from one place to another are due to room modes. Correcting these is a waste of power and does not make anything sound better except at one specific point in the room. It will also add distortion due to higher loads on the driver and amplifier. If the bass does not sound good at the listening position you can start EQing the bass to neutralize some of the modes at the listening position.
Without digital bass management setting up the woofer depends on somebodies interpretation of the sound. Then, trial and error adjustments with the crossover and position of the speakers. It really is hit or miss. In many instances subwoofers should be avoided.

I run a pair of subs with nmtched amp and preamp to my main speakers.  It allows me to listen to music I would otherwise avoid, since I have no tone controls  Mainly old LP's.

I use two Velodyne DD-15's with no xover for the mains. I can turn them off with the remote if I want to but usually keep the on.