I use a QSC K-12 1,000 watt (2,000 peak) powered monitor w/horn and 12 driver. Weighs about 40 lbs.
Here's the full rig:
SKB pedalboard from left to right: Sansamp Bass Driver Deluxe, Boss Chorus, Boss Tuner, Ernie Ball Volume Pedal and Dunlop Bass Wah. All cables are George L.
And Music Man Sting Ray Classic 5 (soon to be replaced by EUROPA 5).
The XLR output from the Bass Driver feeds the PA mixer and the 1/4 output feeds the input on the QSC monitor.
OR
If no PA is available to me, I can use the same pedalboard feeding the effects return (power amp input) on a conventional bass amp such as an SWR 750SX with a conventional bass speaker cap.