Dude, I have worked in a recording studio with mother-effing great monitors (and I still miss that dynamic capacity). IMHO, you need at least 1 high excursion 12" per side, if not 2. But everyone’s got their limitations of size or $$. Good luck. look at the recent discussion of the MCM 8" woofer for $15. Eight of those a side with a good sub would make some sound levels.
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The Dayton doesn’t have the mechanical ability to be used in a small, boosted alignment and have any output capability IMHO. The new Signature subs probably do, but doesn’t look like they will play high enough to meet a dome midrange.
Another factor to consider is using limiters to achieve output. Obviously you would lose bass response as you get louder, but theoretically you should be able to tune the system to hit full rated power. Quite a few smaller active monitors likely use some combination of high pass and limiters to boost maximum output. Very few 8-10" woofers can actually do what the manufacturers claim without using that tech. I have seen very expensive 6" monitors claim 105 db maximum from 40Hz on up. Ridiculous claim.
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Yeah, I was going into it with performance expectations matching a 7-9 inch driver. Again, the Neumann KH-310 seemed to be using something fairly pedestrian. An 8.25-ish inch woofer which they claim a max SPL for bass frequencies (averaged between 50 to 100Hz) is about 106dB. Averaged is doing a lot of work here. In a sealed box even of ~27 liters like the KH310, they only need an xmax of 6mm to get that number. Of course they also use DSP with limiting, which was my plan as well, and the system is intended to be paired with a sub… So I thought all of those little factoids would cover it~ 
^^; … WinISD seems to agree, as long as I’m happy with 97dB @ 50Hz, that should be within this driver’s capabilities… Maybe only “just” within them, but still…
Of course I could also use the reference series sub, as that seems purpose built for sealed enclosures, high output, and can play near where this sig270 can. But still, I don’t think the DSP/limiter route with this signature driver would be too bad either. Unless 97dB @50 Hz isn’t nearly as loud as I think it is.
I would suggest the RSS210HF. Itwill do 40 hz in a 1 cf closed box and handles close to 300 watts.
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I would be REALLY sceptical of any speaker (completed speaker not driver) manufacturers spl numbers. If you dig deap enough you can often find that their spl numbers come from a combination of driver output and room gain. Like all technical specs they get exaggerated when the marketing department gets involved. Sometimes they will also list max spl at something closer to xmech than what they could accuratly reproduce.
Back in my car audio days we would call those exaggerated specs I.L.S. specs. I.L.S. = if lightning strikes.
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Indeed, although I will say I strongly dislike the pictured aesthetic of that driver in smaller sizes. It was actually on my shortlist for this project before I convinced myself (see above) that this 10 inch signature driver was at least comparable to the driver in the KH310, which is a well renouned and respected pair of main monitor speakers in a great many studios, especially if you can cross it with a sub.
I’m a little skeptical of the rs210’s ability to supplement the dome near 1kHz. But I’ve never heard the driver in person. . .
I have the HO version and it works very good up to 1500 hz. Even has baffle step built in to the response.
Yeah, looking at the factory sheet, the cone breakup is high up there in the frequency range. All the shorting rings in the motor delay the impedance rize so it should play nice enough with a passive lowpass.
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Albeit low sensitivity. DanP built his Boxers with the HO and a waveguided RS28A, IIRC, and that was the only detriment.
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Is my reasoning about having substantial overlap in the handoff between woofer and dome (potentially even using a low shelf on the lower end of the dome to prevent distortion) semi sound? Or would I be much better off just using steeper crossovers higher up/lower down?
I know JR just crossed higher to prevent the problem altogether. But thats kinda why I’m asking. . . Heck, at this point if i were to change to an rs210HF/O, should i consider a different dome altogether? MDM 55? Not sure if it performs better than this hivi dm7600 or not.
Personally I would use a 2nd order with a notch on the breakup on the RSS210HF. I used my HO version like that just to see how it sounded in a 2 way. I was not dissapointed. Surprised actually, since these are, technically, subwoofers. I was using two 8 ohm versions in parallel to get better sensitivity but like I said, they easily take the 300 watts which should give you all the output you want.
I have not tried the 7600 but I am using a 2" Tang Band soft dome crossed at 1khz and it is stunningly good!
With that said, if the 3" dome can’t work below 1khz, I wouldn’t use it.
It should be fine playing to 600 if you have the ability to eq it actively, I crossed at 800 - was just easier passively.
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I crossed it at 550 just fine - I just liked the increased guts offerred by the 8" woofer crossed at 800 Hz better, in my listening environment using a sub below 80 Hz.
The DM7600 is worth the expense IMO.
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