Rather a newbie question I'm sure to most but looking for some advice.
Four piece band here, guitar, bass, vocalist, and drummer, playing classic to modern rock in small 'dive bar' locations mostly less than 100 patrons. Kick drum is mic'ed, never had a problem with them carrying, just like to give the bass drum some punch. Guitarist and bassist have their own amps, though looking to put them eventually into the sound system so as to reduce stage volumes. Moving to powered speakers to help reduce the equipment load and have picked up a pair of Dark Matter 112's which carry the vocals nicely. My question is we are looking to add a sub(s) to the mix to to help reinforce the kick drum and potentially the bass. In this situation would it be best served by a 15" or 18" sub or set of subs?

Thank You!!!

I didn't find the right solution from the Internet.

References

https://peavey.com/forum/viewtopic.php?t=45535

Field Management Video