Paul, welcome. As other replies have indicated, the so-called "bi-amping" feature that some receivers advertise isn't real bi-amping and is essentially meaningless. It simply sends the same amount of power from the the one main power supply section of the receiver to the speaker through two sets of output transistors(one set previously unused for the back surrounds)rather than one. This can't double the maximum power available(as some imagine)or increase it by any amount.
Bridging is an entirely different process. It sends two voltage inputs into the one set of speaker terminals. The reason that the two don't collide in the speaker driver and neutralize each other is that one voltage is reversed in polarity so that it "pulls" while the other "pushes" and the two co-operate to power the driver. Theoretically the double voltage could result in a maximum quadrupling of the power since when the voltage is doubled into the same resistance the current is also doubled(Ohm's Law). This doesn't happen in reality and the best that can be achieved is about a tripling of the maximum power. Incidentally, it can be pointed out that the amplifier doesn't "see" a lower impedance when it's bridged, as is sometimes said. The impedance of a speaker is set by its wiring and the amplifier can't change this. The higher current in bridging is due to the higher voltage into the same impedance.
So, if you actually need more maximum power, bridging could be tried; however it seems highly unlikely that your 5007 wouldn't supply more than enough power already, unless you care to operate at sound levels that permanently damage your hearing.
