Hi Sepp
good reverb requires the following:
-good design (diffusers/early reflections placement)
-many internal delay lines in the reverb
-diffusers with many internal delay lines
-delays for early reflections
-accurate filters/Eq for sound shaping
These are all modules. In many of them you can choose how many delay lines are working.
Obviously *good* reverb IS demanding on DSPs resources. So the unit can provide 4 or even more reverbs in a single DSP/preset, but they won't sound like better & bigger structures do. The optimal quality/size ratio in the H8000 is 2 verbs per DSP/preset, so 4 in all. The PERFECT quality is one in each DSP. Here we are talking supreme filters at work.
Another limitation IS sampling rate. Above 48KHz, quantity is cut in half!
Show More...Here's a list of 4 & 2 verbs in a preset:
1621 4 Reverbs (FoH)
1032 4 Stereo Verbs
1033 4 Stereo Verbs 2
1039 MIDI Dual FX #4
1030 2 Stereo Verbs
There some others you may want to search for.
Obviously the quality of 2 verbs like the ones in the "H8000 _ Reverbs" bank is something else.
all the best
Italo