Presonus supports the use of up to 4 Quantums on a single Thunderbolt enabled computer. Each Quantum supports the use of 2 DP88's with remote preamp control.
The way that this setup works is that each Quantum will have it's own user interface within Universal Control software. Within each user interface for Quantum, you have access to the local preamps of the Quantum as well as the remote preamps of the connected DP88. With 4 Quantums showing in Universal Control, there is an interrogation button that will allow you to see which physical Quantum you are dealing with.
96k sampling rate is supported for all Quantums and DP88's when aggregated.