+1 Tomic.
Considering how the M5-HP is filtering frequencies above 80 or so hertz, if you added the REL via the speaker connections, then it would be receiving a filtered signal (-6 db? at the crossover point). I don't know if you would be able to counteract the effect of the crossover. And, I don't know how you could get an unfiltered signal without removing the M5-HP.
Please read the 2wq manual, it has a graph and explanation of what is going on.
https://www.vandersteen.com/media/files/Manuals/2wqmanual.pdf
Bob
Considering how the M5-HP is filtering frequencies above 80 or so hertz, if you added the REL via the speaker connections, then it would be receiving a filtered signal (-6 db? at the crossover point). I don't know if you would be able to counteract the effect of the crossover. And, I don't know how you could get an unfiltered signal without removing the M5-HP.
Please read the 2wq manual, it has a graph and explanation of what is going on.
https://www.vandersteen.com/media/files/Manuals/2wqmanual.pdf
Bob