Vandersteen sub question


Hi All,
I have 2 Vandersteen 2w subs I am currently running through the M5-HP crossovers in my 2 channel system. I have acquired a REL B1 sub and want to know would there be any issues to the crossovers or anything else if I connected this to my system?  It hooks up basically the same as the Vandersteen subs. Just wondered if anyone on the forum has done this.
Thanks.
flippinjaz
I looked at the excellent REL manual, I think the easiest route is to use a high quality Y splitter AFTER the M5-hp filter and run line level to the REL  using mode position 2 on the REL which bypasses internal REL filter. Run the Vandersteen side as you have been.
Factory is open today, give Richard or Nathan a call to confirm the Y splitter does not change M5 output.
Audioquest makes a decent quality RCa splitter
@tomic601 
I forgot about a Y-splitter. Having no experience with REL subs, I didn't know there was way to avoid the internal crossover.
You da' Man...
Bob