It is very difficult to integrate sub with main speakers seamlessly especially the texture and speed of the bass notes. Maybe the servo controlled sub will (has not tried) but it is usually pricey for a good one. There are budgetary floorstander or standmount speakers could get down low to 20-30 hz range but keep good tonal balance.
Subwoofer suggestions for budget system?
My current setup is a pair of Magnepan 1.6 speakers, a pair of Schiit Vidars, Schiit Sol turntable w/Goldring E3 cartridge (I have a VAS-rebuilt Denon DL-103 with Ebony shell and microridge stylus when I can get someone to come set it up for me), Mani 2 phono stage, Asgard 3 headphone amp acting as preamp, Schiit SYS as source selector, Modi 3+ connected to Volumio for streaming digital and an Orchard Audio RCA-to-XLR converter to drive the Vidars in monoblock mode.
I'd like to add a subwoofer to the mix that can keep bass out of the Maggies. I'd, of course, prefer a dipole sub to go with the dipole speakers, but not terribly picky ATM. My budget is around $200 to $300 for now. I have been very tempted to build a pair of my own subs, but that's not in my budget right now.
Suggestions?