I run a Mesa M9>>>>LDS 15/6 which is very similar to a fEarful (uses the same 3015LF driver with an 18sound 6" mid). I absolutely love this setup. The Mesa Carbine heads are not high-passed like most heads and they are very conservatively rated in terms of power. The match is supreme for clear, deep lows because the fEarful (and similar ) cabs (unlike most stock cabs including Mesas) CAN actually project those lows at gig volume. Not everyone likes or wants that, but I do, in spades. If you want deep, clear and wide low end with no compromise in the mids or highs this pairing will deliver.
some of my heros: Buckminster Fuller, Jean Beliveau, Galileo, Richard Dawkins, Bobby Orr, Nelson Mandela, Terry Fox
Crappy Bassist with Expensive Gear Club member 156