Your sub experience: Easy or hard?

I have two JL Fathom v1 13’s and use a DBX Venue Driverack 360 to integrate them into my system.  It has on the fly gain, phase control, delay, subharmonic extension, frequency slope adjustment and more.  I was constantly experimenting with adjustments and still am, but having on the fly adjustment is great.  Some of the best producers and engineers rolled the highs, as well as the lower end off and ruined good recordings.  Classical and some Country, as well as other genres have been consistent in having well produced recordings, but as I said, too many rolled the best part of the recording off.  It’s hard to add what was never there, but the DBX unit does a good job compensating.  

Started off with one, added another shortly thereafter with good success and a bit of trial and error.

It is essential that you choose a sub or subs with room correction for best results, if you do not otherwise already have RC elsewhere in your system at present. It is very effective at aiding in the integration process, especially one with an infinitely variable X-over point.

According to my experience the choice of a sub (or more than one) depends also very much on your room and its acoustics - and, of course, on the quality of the components in your stereo system (low, middle, consumer, high end). 

I assume nobody out there knows or remembers the make of the sub I use: Acustik-Lab Stella Novus (originally spelled name), a Swiss made component which was very in demand in Asia in its time (and very costly, unfortunately). It allows settings in many ways, which was prior to today's DSP. (The company no longer exists.) So my favorite crossover setting  is 42 Hz...quite discreet. 

Set-up was quite easy, and I needed just some days to find the right listening setting (for me). As another A'goner wrote, the recordings (LP & CD) vary, and depending on that I am able to adjust the sub's settings (by remote control). 

Just a quick note to everyone.

Thank you very much for sharing your insights and staying (mostly) on topic.

Erik

Trying to integrate one was very difficult. Never blended right and never sounded balanced to me. But integrating two was much easier and sounded great. I settled on line-level with a cable from amp speaker taps to a powered subwoofer for each of the two channels.