My understanding is that you wanted to connect 2 Powered Subs to an AVR which has a single LFE/Sub Pre out.Will this one do?
RCA Male to 2RCA Female Audio Video AV Splitter Jack 2pcs | eBay
So this goes into AVR ... then a Sub cables to connect into this Splitter at one end and on other end to "Y adapter" which goes in L & R of Sub.
Looking at Specs of both Subs, do you recommend trying out both together?
Correct?
The Y splitter is to be used for the above requirement and not for connecting the Left and Right channels to the same Sub.