For what it's worth, I sold my Powerhouse 412 and replaced it with 2 Berg HD210s. The sound is more articulate and attack more immediate. There is a warmth and clarity throughout the range which I find satisfying.
I know there's a lot of love for SVT810s out there. I own one. But my paired Fender Rumble 410s are tighter, punchier with a growlier bottom end. They now have the nickname 'giantslayers'.
I'm told the output stage and platform is identical in both. The pre-amp tubes are the big difference. Apparently it goes like a train. I'd love to try one.
Just to wade in again...the rumble 410 cabs are not heavy and stack beautifully. And yes when played through my EBS head they spank my Ampeg SVT810. Spank it into submission. Band agrees. No contest.
Now I'm keen to try Hartke cabs! But what I can say is this: My paired Fender Rumble 410s spank my SVT 810. Tighter, punchier and more responsive. There are surprises out there.
You probably need to get away from a combo. I love my Rumble 200 for practice and in an emergency I could gig it with an extension cab. Having said that, my pair of Rumble410s sound great with a separate head.
Well this should make Rumble fans happy: My pair of Rumble 410s just spanked my Ampeg SVT810. They are clearer, louder, punchier, more articulate and more responsive. And tweeters were off!