I think the quickest path is using an adapter like this one: http://www.monoprice.com/products/produc...=1&format=2

Along with a transformer that has the 1/4 connector on a short lead, like the Sescom ones I've seen. Not only is that simple to procure and install, it may also be the solution to fit into the tightest space. I don't have very much clearance behind the 990. It already took a custom-designed/made cabinet *and* a recessed pocket in the awl behind the cabinet to accommodate the 990 and the XLR and power connectors.

It's a shame the 978 isn't going to be 5" or so shorter in depth. The cabinets on many pre pros are definitely way too big. Then again, I may just have to jump onto something else toward the end of the year if the 978 isn't released.