Quad Balanced Pre-Amp


Am in the market for a pre-amp to go in between my Oppo 205 and my Mcintosh Mc275 VI. Mcintosh just released their new pre-amp, the C49.  Anyone know what advantages their are to a quad-balanced pre-amp?
lilchris9
'quad-balanced' appears to be a marketing term for their DACs.
Odd that its a balanced preamp and doesn't have balanced inputs for the phono, since phono cartridges are balanced sources.
The C49 is about $500 more than the C47. Does the C49 have $500 worth of upgrades? Looks interesting though.