Final answer:
No, it is not possible to setup four independent, discrete mono reverbs using one engine on the S6000. However, you can create four busses and assign different mono inputs to each bus. Then, you can apply a reverb effect to each bus individually, effectively creating four different mono reverbs.
Step-by-step explanation:
No, it is not possible to setup four independent, discrete mono reverbs using one engine on the S6000.
On the S6000, you can only have one reverb engine active at a time. However, you can create four busses and assign different mono inputs to each bus. Then, you can apply a reverb effect to each bus individually, effectively creating four different mono reverbs.
So, while you cannot have four independent mono reverbs using one engine, you can achieve a similar result by using multiple busses and assigning different inputs to each bus.