Hey guys, I just got a pair of rs210's last week and I took them over to our rehearsal room with some other gear and had ourselves an old fashioned shoot out. We had a markbass lm2, epifani 502, aguilar db751, hs410, ht112+ht210, and my rs210's. We first tried my markbass with the rs210's and we were both shocked at how amazing these cabs sounded. Across the whole spectrum low to high they were very even sounding. Nice highs, very smooth, very tight low end that held together when I boosted the bass quite a bit. Then we plugged in the epifani 502, and......eh, not that great, not compared to the markbass. We ran all the amps flat eq and the epifani just had wasn't as even across the board, it had a real distinct voice that to me wasn't as clear in the high mids or something, kind of a harsh sound compared to the lm2. Then we plugged in the aguilar, and no big surprise, it wiped the floor with everything in the room. It's not a fair comparison though, tube pre, 42lbs, much higher head room, and $2000 it just killed. Smoooooth low end for dayssssss, and beautiful highs. We then plugged all the setups through the bergantino ht112+210, and we weren't as impressed. The bergs had the midrange voice that they have, and did sound good, but still the rs210's covered the entire frequency spectrum much more evenly with no noticeable bumps of valleys in the eq. Finally, the hs410 we could only plug the aguilar into for time contraints, but that thing killed, i think between the rs210 stack vs. the hs410 was quite similar with a nod to the hs410 when it came to having more low end, but the rs210's were a bit quicker on the response end. We then took the markbass head to a store that had the tc 450 head and ab'd the two through a 210 +212 stack. The tc 450 sounded great and had some nice tones with using the tubetone knob, but when we plugged in the markbass, it was just so much tighter in the low end. The 450 was getting kind of boomy in the room we were playing, but the markbass just tightend it up. These cabs seem very transparent as the markbass sounded just like it should, very clean and even. So, the markbass is still my go to, and these cabs are slammin'!
Cool review. I agree about the Epi502... very strange voicing that kind of sucks the definition out of the upper mid range or something with virtually every cab I've played it with (Bergs, Epi's, etc.).
I did a pretty good comparison of the MB LMII and the RH450, and I agree, the LMII continues to amaze me, and is 'smoother', flatter, and cleaner than the RH450.
One thing about turning the bass control up with the RH450 versus the LMII, the LMII has a very nice, true 40hz shelving 'deep bass' control (similar to many amps out there). Out of the box, the RH450 has the shelving start point for the bass control at 280hz

So, when you dial that control up a bit, the RH450 really boosts the low mid punch and upper bass, and gets very chewy and fat versus low and clean and deep. I was pretty easily able to mimic the LMII tone by going into shift mode, and moving that shelving start point down to around 100hz, and moving the treble start point (set at a very low 1K or so out of the box) to around 4K and boosting a touch (the RH450 is quite a bit 'darker' set flat than the very even LMII).
So, +1 to your impression of the RH450 with the factory default EQ points. And +1 that the LMII just blows the RH450 out of the water with both set flat. The RH450 needs a bit of tweaking IMO to come into its own.
I too love that smooth, fat DB750 tone when played solo, but have been, in general, unimpressed in a mix... too much of a good thing... plenty of fat, plenty of smooth, not enough mid definition and upper mid clarity for me personally. IMO there.
Cool on your cab review. I'm pretty set with the AE410 (which sounds awesome with both the LMII and RH450), but would be interested in checking out the TC cabs eventually (2 x 210).
Edit: One additional comment... it's that 'chewiness and punch' in the upper bass/lower mids that has me loving the RH450. With my J style, single coil loaded instruments, the wide, pure, open voicing of the LMII, while sounding great, every once in a while lacked a bit of punch and burp in larger, boomy rooms. That upper bass/low mid control that the RH450 offers just POWERS a J Bass tone through a mix. I really dig that, even though solo, I prefer the LMII a bit. Both are great.