I had a 3 pro for around 4 years. Really enjoyed it with the tube gain and master cranked and bringing the gain up to taste.
I ran it with ashdown mag 210 and 115 and it always did the job volume wise. Struggled oncertain in a marquee with a boomy stage, but still had enough in it.
I experienced a fault once but it still ploughed on. I ended up changing for a light weight option, now have an Ashdown and I haven't really missed it. It was my first proper rig and I had a real thing for ampeg at that point.
If ampeg sound is what you're after, it'll do it well. Then again, so does the vt Bass and a power Amp, without the ampeg logo of course!