EBS Microbass ii with Rick-o-Sound

Short answer is no.
Long answer is still no, but with an explanation: you need two channel amp or two amps with separate speakers to have a "stereo" sound.

If you have some sort of a mixer/combiner you can combine two outputs and have different sound for each pickup and then go into one input of the amp, but that is not stereo.

 

Stereo is a much misused/misunderstood term. Technically, it refers to dual channel audio, but in today's world it has come to mean left and right imaging.

Whilst not technically 'stereo' in the modern sense, it will be able to handle dual channel output from your bass if you split the stereo cable from your bass into inputs A and B on the EBS.

Also check out the Radial Bassbone and Bassbone OD for similar usage.

Also, for a simple mixer, try the Boss LS2. I did exactly the same with the 'stereo' outputs from my Attitude bass, running each through different processors and combining with the LS2 to send to a single amp.

 

There are less costly and better ways of accomplishing it than the Microbass. I used to have one and while some aspects were cool, I found its EQ scheme with one channel having bass/treble and the other a parametric mid to be ridiculous.