Have i got this right ?? Some bass players are using power amps (as in PA systems ) as Bass Amps ??? I have come across the QSC RMX 850 for 349 euro and you can get 2 x 300 watt at 4 ohm , which seems to be lots of power for the money ie 600 watt for 350 euro !!,, but how does it sound ???? Does anyone here use a power amp ??