Is 4x10 400 watt 8 ohm Hartke with fender rumble 500 head loud enough for live shows

I have never played a gig where your set up would not have been adequate. I have played some where it may not have been optimal, but I have never played one where it wouldn't have worked.
This is partially true, poor eq choices can make almost any amp unhearable in the mix, while good eq choices make it much easier to hear a smaller amp. I suspect the OP has bass cranked and wonders why he can't hear himself.
 
I would not want to play in a band where your rig would not be enough to get the job done. That being said for you to get the best sound out of that head I think you would be better off with two 8 ohm 210s or as someone else suggested one 4 ohm 410. Having the extra head room can improve your tone, but what you have will work.
 
gutairist has a 4x12 half stack marshall... house parties and local clubs venues
Your Behringer would probably have been ok for these gigs, maybe even adequate. 250W out of the Rumble and that cab should be more than enough, not quite to say 'you are bringing too much amp to the gig,' but I doubt you'd be going over half on your volume ever in those size rooms.

It will be plenty loud unless the guitar player likes to dime the Marshall. Basically when competing with tube guitar stacks there is no such thing as the bass being loud enough
This right here is what you should be paying attention to.

A 30W 212 guitar amp would probably be plenty loud for those gigs. Just so you know. What's the actual amp head? How high up is its volume? If you stand in the very back of the place can you clearly hear every drum beat over the guitar? Even with a half stack, 100W is enough for an outdoor stage, very large concert hall, etc. For reference, the 50W 5150 III (based on Marshall designs by way of Peavey and now Ed's own company) is described thusly;

the EVH 5150III 50W ... is the perfect amp for players who want arena volume and performance in a compact package.

50W guitar head is 'arena volume' (according to marketing hype, but this is just to illustrate the point). Yes speaker area, ohms, and efficiency all matters just like it does for you. But while they need 50W for 'arena volume' you are asking if 250W is enough. Those two wattages, if they are both tube amps and 'equivalent' cabs (half stack = 810, 215, 218, or 412 for you) are approximately equal. With the rumble into 8 ohms you are about 2/3 or 3/4 'equivalent' power if they are running 50W tube head, and severely outgunned if they run 100W tube head.

Other than vocals what's going into the PA? Your volume should be more dependent on whether drums/which drums are in the PA than the guitar amp in those size venues; ie not being drowned out by toms or kick. Even for hard rock and hardcore, it's likely too much guitar amp for the stage.
 
Fender Rumble 500's are powerhouses. They don't have a lot of extras but the juice is there .I have two Rumble 4x10 cabs and rarely use both. It is crazy loud. One 4x10 hartke 400 watt cab with the 500 Rumble head is plenty.(Try the vintage and bright settings,cut back on the bass and up the low /high mids to avoid the Rumble's boom and you'll cut through without any mud ). They'll hear you alright.. snag some good pro ear-plugs too...
 
Depends.
410 can be enough.
With certain bands it's barely enough and riding on edge.

Not really about the watts. It's about speakers. So if 4x10 ain't enough. You need 2. Hence the 810 and why it lives on

I haven't had to look for a cab upgrade for zillion years. Don't have to Worry about scientifically correct EQ curves. Or never touched a high pass filter. Or for good sakes don't come up with some incredible mismatched cab setup that so so amazing

Pretty simple. One 810 for everything lol
And 2 when I want more.
 
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