Is Bass Non-Directional In A Two-Channel Rig?

It should be non-directional but the timing issues remain, anyway, especially with wireless connections that introduce 10-20msec or more of delay. This can work but putting the sub up front with a wired connection makes it a lot easier.

Kal

Dual stereo L/R time aligned subs matched up with the mains is the way to fly. Even if you cross over the subs at 40hz the actual cabinet enclosure acts as a giant passive radiator creating at least 4th order harmonics that need to be blended in to the mains. It is very easy to hear the placement of one and near impossible to hear the two as described. Each woofer will greatly benefit in speed and transparency if the cabinet is direct coupled { use brass] to the mass of the floor. Direct coupling {use brass] the woofer cabinet to the floor will limit the upper harmonics into the midbass and beyond resulting in much more clear mids in the main speaker pair. Tom

Good answers...and the truth is..yes and no...based on the above.

In the old days of analog only, the answer was yes. Drive by a bar/dance club at night and you will only hear/feel the bass....sometimes the voices...but try to hear a cymbal...

It's I've read, but not what I've heard.

"
In the old days of analog only, the answer was yes. Drive by a bar/dance club at night and you will only hear/feel the bass....sometimes the voices...but try to hear a cymbal..."
Irrelevant. That has to do with sound absorption issues.

Kal