ReL Subs: High Level or Low Level connection

The only way to settle your quandary is to try in your system. Having said that, REL pride themselves on seamless integration through high level (speakon) connection. That’s how I am running my pair of REL’s. 

I just set up a S/510 for my Dad.   Awesome sub.  I used the Speakon connection and it sounds great.   I also have a REL in my second system and it is using Speakon also.   In my main system that sub was driven by the pre out .   I think it integrates better with Speakon and a low crossover setting 

Thanks all

Appreciate the input 

FYI, I have Anaylsis Plus cables with Speakons for the REL subs. The cables don't work with 2 pairs of spades on my Pass INT-25 (probably the same on your INT-60) due to the plastic protection caps on the speaker terminals.  You can run the sub cables off the speaker instead.  That also saves on cable length.

You likely already know this, but I forgot to say that the crossover setting on the sub is critical to getting it integrated.  Obviously it’s speaker dependent but I started with mine too low.