Greetings, Im in the process of building a pair of down firing sonotube subwoofers utilizing one Dayton Ultimax 15" driver per cabinet. I have a pair of Bryston 4B amplifiers that I was planning to use to drive each sub. I was hoping to run each in mono, providing 800w RMS x 8Ohm per sub. My question is, is it dangerous to run the Brystons in mono to provide a 4 ohm load for the Ultimax drivers? I'm not quite sure how stable these 4b's are built to be for 4 ohm loads when run in mono. Can anyone shed some light on the Bryston amplifiers when ran in mono for a 4ohm load?