After reading the thread again i realize i have misunderstood the semantics.
The terminology is not really used with 100% consistency, so it's sometimes necessary to explain what is meant.
I would think of Ric-O-Sound as stereo if both channels are kept separate from bass all the way through to the speakers. But IMHO there really should be no intent to run the speakers physically separated to try and create any sort of stereo effect, as this will result in undesirable phasing between the cabs. Since there is no intended effect IMHO it could also be called dual mono and I would not quibble.
For the record yes, I have run Ric-O-Sound and tried it with the cabs both separated and together. Running the cabs separated can be cool for the bassist. The phasing comes into play more from the audience's perspective. Separating the cabs will cause the frequency response to vary more at different positions in the room. So if the bass rig is expected to carry the room, separating the cabs is somewhat problematic.
I have multiple bass amps with Dual Mono outputs. They have one channel preamps, but break the signal into two channels. Some have separate volume and effects loops. If you apply stereo effects, it's arguable that you could call it stereo out. Some of them have two outputs, but no separate volume or effects loops. The idea is each channel is 100% identical and the benefit is you can run more speakers. I would call this dual mono, or possibly even just mono.
I also have some amps with two preamp channels but only one power amp. Some of these amps are channel switchers so only one channel is active at a time. But you can run both channels simultaneously on my vintage SVTs. I would call this mono with multiple inputs, then explain whether the inputs are switching or can be run simultaneously.
I also have a bunch of amps and can multi-amp. With Ric-O-Sound you could call it stereo. If you are splitting a full-range mono signal to both amps, I would probably call it dual mono. I would be more likely to call it multi-amping as opposed to biamping. IMHO, Biamping breaks the signal down into high and low frequency ranges. One amp carries the highs, and the other amp carries the lows. There are some people that insist this approach should be called biamping though.
For many years I toured a rig that had the capability to be full stereo. The rig consisted of a rack mixer and stereo power amp. Sometimes it served as my bass amp, and sometimes I added speakers and mics, and it served as a small PA.
