How to distinguish a reactor 900 from a 600?

[robreid]

I'm very new to this forum (2nd day), and from what I read as a guest, there's a mix of people discussing things from an audiophile's perspective and others just celebrating the Phantom range. So I wouldn't (personally) consider this exclusively a forum for audiophiles.

While I'm certainly not an audiophile, I love the Phantoms. I can obviously appreciate the difference between mono and stereo but am not in a position to buy a second Phantom at the moment. So will continue to enjoy my Phantom in mono in the meantime.