Subwoofer boom is too much for me...

This has worked for me every time I’ve set up a sub, whether it be REL or another brand. The idea of keeping the crossover as low as possible while volume high was tough to swallow at first, but now makes sense.

A horrible compromise at best and only recommended if you can do nothing about the response of your mains. Meaning, no high pass filter and won’t/can’t plug your port.

Many A'goners have gone the other way and been much happier.

Spend $10k on dsp, bass traps, diffusers, and absorption. Or, get a pair of athletic socks, ball them up and stuff them in and send me the $10k.

Also think placement then crossover setting/gain key. Perpahs four is too many?

Much has to do with the quality of your sub , I went from the $500 Svs pro 

to the 1000sb $1000, to the $svs 4000 sb $1800

and the 1000 had much more control and articulation ,

then to the 4000 SB-Sealed box. It took it to another level altogether the bass much faster,more articulate and controlled. ,No boom whatso ever .

you didnot mention what subwoofer you were having issues with.

Try a lower level for the sub ...