Rel sub

Just get a second REL sub, I have monoblocks and researched the issue of a single sub, not good for REL subs or any subs for that matter. My present setup with the two REL subs provides me with most coherent low bass I've yet experienced. This vs. various single subs setups via low level outputs and DSP. Mijostyn is talking about room modes, here-https://www.youtube.com/watch?v=TiIIHztRqCA

Also, I run only a single signal wire out, hot to positive on amps, ground to chassis. With two signal wires, to both positive and negative binding posts I get excessive output, read about this in owners manual and/or forums. And, I run a set of diy cables to the REL's, I use only Neutrik brand, no fakes, and just enough length of Duelund tin plated copper, far superior to the stock cable in any length. The cabling does affect sound quality of REL subs. I'm next going to experiment with VHAudio AirLock, OCC copper/ solid core wire, this vs the Litz wire in stock and Duelund cables. Some claim solid core more impactful, articulate than Litz.

I meant to say Neutrik CONNECTORS, there are inferior fakes out there.

@fertguy I'm using Duelund tin plated copper wire on REL's, I'd take easy bet on these diy cables being superior to the two you mentioned, read some reviews on the Duelund wire for speakers. For DIY cables you don't even have to know how to solder, with the Neutrik you can clamp without solder, bare wire at both ends. You don't have to spend big money if you diy, and diy can be superior to any pre-assembled REL cable out there. Just like the amp, cables affect sound quality of REL's, part of tuning these subs for coherence with main speakers.