Still fuzzy on adding a Subwoofer to bridged ACA monoblocks

Having read these threads, and being a less technical DIYer, still not clear about if or how to safely add a SINGLE subwoofer to my bridged ACA monoblocks.

I am using smaller speakers and on other set ups i’ve enjoyed what a decent sub can do for overall soundstage etc. curious to know if i can take the ACAs a small notch higher.

I would use high level connects betw the ACAs and the sub.

Can i safely connect REL using their approach or an SVS sub using their standard (4) speaker connects?

How to check for problematic ground issues?

Is the reversed polarity a concern?

See, a very non-technical solder by numbers DIYer.

Any insight is appreciated. Its been great fun to build the ACAs and an ACP+ for my first builds.

Chuck
 
while speaker is getting signal from two hot outputs , nothing is preventing you to send signal to sub taken from one hot output ( as live) and from ACA GND

that, presuming that subwoofer demands SE high level input

now, just take care of fact that ACA outputs are somewhat confusing, PLUS outputs are actually on GND potential

if in doubt what GND is, use your ohmmeter; define what GND out is (connected directly with RCA GND), other one is live

simple as that

if you need to flip/try other polarity of signal sent to sub, just take live out from other speaker hot
 
Not sure if this will help but I have 2 RELs hooked up to an AlephJ and was told to hook them up like this. The grounds are floating. REL also has a set of videos on hook ups here. https://rel.net/blog/2018-01-04/how-to/how-to-connect-my-rel/
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