Two subs or not two subs...

I noticed this unit has outputs for a single sub, or a stereo pair of subs.

https://www.audiogon.com/listings/lis9bg0c-black-ice-audio-f360-tube-hybrid-preamplifier-tube

powerful amps for subs are not just to push a lot of air, they are needed to stop/control the woofer, as important, so go for subs that can contain themselves.

I'm a big fan of mains with no ports, full range for large rooms,

or, smaller mains with no ports, with stereo pair of front facing directional subs (self powered) for smaller rooms.

Bass is not mono as some believe, just listen to the placement of bass players in jazz groups, or listen to this!

https://www.amazon.com/Double-Bass-Niels-Henning-rsted-Pedersen/dp/B00000G62F/ref=asc_df_B00000G62F/?tag=hyprod-20&linkCode=df0&hvadid=312683822382&hvpos=1o1&hvnetw=g&hvrand=3655329634212047699&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9003511&hvtargid=pla-540093611693&psc=1&tag=&ref=&adgrpid=65958438881&hvpone=&hvptwo=&hvadid=312683822382&hvpos=1o1&hvnetw=g&hvrand=3655329634212047699&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9003511&hvtargid=pla-540093611693

IF ports, front facing.

Home theater, single self powered sub can be quite successful, but, if watching music concerts, then directional 2 channel full frequency mains or pair of stereo subs is advantageous .

mitch2

I don't want to expose myself to more than my pair of 15" woofers, I might want it. No room. 

wolf_garcia

good point about the bassovertones giving location.

After a lot of years, I simply sum up my preference for tubes as "Analog gets the Overtones right".

Did you see this thread about a bee's hive of subs?

https://forum.audiogon.com/discussions/best-bass-in-earth-bass-that-just-smells-right