Tight bass sub recommendations

+1 for Rythmik

Owned various REL, Velodyne, ML, Revel, SVS, Infinity, B&W, Wharfdale, Sunfire, plus others I don't care to remember...  an MBL too....   Only Wilson impress more but doesn't like that price tag.  I like JL too but matching it seamlessly is very hard.

I use a Klipsch sw308 sub with a pair of Kef ls50s. Great combo. I can highly recommend this sub for very articulate, tight extended bass. It uses two 8" passive radiators in conjunction with its 8" bass driver to do the deed very well indeed but in a more compact package than most.

Does the op have a budget or any room/layout constraints?

martin logan dynamo is a really fast, tight sub which should pair well with the maggies--very good value used.

Hey Shcmitty1 I have my 1.7i's for 4 years and have worked on various ways to improve bass with most of the suggestions posted here. The problem is the Maggie's produce such a clean it's hard to integrated a sub without smearing the existing sounds. My last addition is a 1000 want parasound 21+ and a slight increase in volume. They are so power hungry and sing when feed. I would like to hear from more Maggie owner being this was the question you posed. Thanks