[W9TR]

There are two separate discussions going on here.

The first is how to properly integrate a sub with your mains so that the time response is correct. This will involve delaying the signal to the mains the exact amount needed to match the delay in the sub.

If the MEN 220 has a straight delay capability you can use that for the mains. Never owned one so I’m not sure.

To make up for the 12 mSec delay in the subs, you’d have to move the subs physically 12 feet forward! That’s an impossibility in most rooms.

By setting the sub distance in your pre/pro 12 feet farther back than it physically is you will delay the signal to the mains and surrounds by 12 mSec to match the delay in the sub. A little counter intuitive, granted, but you can’t turn back time and create negative delay!

Finally once you have the sub/main delay thing worked out the LFE is just a matter of setting the right levels.

The way REL integrates their subs by paralleling the mains speaker connection is technically incorrect. The steady state response is fine, but transients are not properly compensated. However, their subs are loved by many, so who am I to judge?

Tom