REL subs with BAT amps

Thanks for info Tom...love the Rex mono's..very similar to 150 se I had and sold years ago. Missed sound.tried Plinius 103 pass labs 160.5  but came back to Bat's something was missing with other amps. Love sound and yes no fuses is a big plus.

I use BAT amplification with the REL b2. You don't have to attach the ground wire to the amp frame. The most convenient, and right way is to attach the ground wire to the BAT preamp's ground connector. That's what I did, and that's what's described in my REL manual for the balanced amps. You can, of course, attach the ground wire "to amp frame somewhere", but why?

For me it would be easier to attach to the amps. My preamp is close to 30' from amps,  and possibly farther from subs depending where they end up.