HSU vtf3 mk3 with Martin Logan Dynamo

I already have an existing ML dynamo and have recently purchased a HSU vtf3 mk3 sub. Would it be ok to use both subs in my setup? Would there be a mismatch in my bass effects? I have a denon 3808 ci receiver.
Also what is the best way to add 2 subs to my setup?
I plan to place the ML dynamo on top of the vtf3 with the driver facing into the room. I currently have the dynamo in down firing position.