I'm waiting for an Anti-mode 833S to be delivered. Tim Ryan at Simplifi Audio is letting me exchange the 833C for the 833S. The summed signal from the pre-out of a Musical Fidelity X-150 caused a horrible racket - I was only able to calibrate one channel. The 833C is best used with a LFE output, the 833S is geared towards a 2.1 set up.
My thought is to connect the 833S's summed signal to one (left or right) input on the ForceXL - that way the volume of the sub can be adjusted. I watch movies in 2.1 and sometimes the bass track is too startling. I love the realistic sound of an upright or electric bass - even the odd organ note - but I can do without the realistic sound of bombs going off in my living room. I live in a condominium and have the luxury of downstairs neighbors who are away for 90% of the time but I don't want the rest of the building to think we are under attack! The ForceXL is that good.
Stay tuned. I'd be interested in your experience, too.
Kevin O'Toole