I could be wrong but your current 5200s don't support EBA and, in my experience, EBA took the overall sound quality including bass to a new level. What I would do is use the sub woofer funds and trade the 5200s for EBA compatible DSPs. That would be a more sustainable future path, of course it may not be what you want to do. JMO! Good luck.

Roon, Technics SL10 turntable, Meridian 218, Jolida tube DAC, Nuforce STA 200 Amp and passive Swallow Acoustics ALS2 speakers