I have not. Sorry.
Im currently using low pass from each Rel to each pre out...via y adapter :/
One could just use the sa3 as a pre amp but I’m stubborn. And I like how the stack sounds.
I also prefer the high pass on the rels. Bass is better, sound is better. :/
I suppose there are a couple things I haven’t tried... those 2 things are:
Upgraded cables and..
Someone suggested soldering the BLACK wire on the rel cable to the outside shield of a rca plug...and connecting them to unused inputs on the sa3. Rel claims there’s no difference in that than there is using a rca from sub to input(which didn’t work) I haven’t given up...just taking a long break and trying to to enjoy my music.
I even talked to Ian..the IOTAVX’s head engineer and ceo. He called me from England and we talked for almost an hr. He called because I sent in pix of the way rel told me to hook it up for high pass. He couldn’t believe it and was basically like what the hell is that. He flat out said he hasn’t seen that kind of connection since the 70s. Then he went on to say...I developed a very good sub out...use it.
Still...I a/b tested it. And to my ears...high pass sounded better.
Keep me posted man. I’d like to know what u decide to do. Which rel are u thinking abt?