Those are nice looking!!
If those work in enclosure sizes close to the PE suggested cabinet sizes, they look great!! The 18” says 26hz f3 in a 5 cubic foot enclosure. That may push me to try a pair of 18s in my space.
They look very nice. I am no marketing person, but PE does have some redundancy in their sub lineup - the Ultimax II was a fairly recent addition - this one seems to fill a similar slot. It’s like they are competing with themselves. Maybe the UM-II will ride off into the sunset, like the RSS HE models did.
Nope, the UM2 are the economy car and number 1 seller. The Sig are the Ferrari by comparison. Bryan Meyers’ words from Toid interview.
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compared to the RSS subs? They seem to be priced similarly and the RSS subs have been around for a long time.
I believe the RSS are still considered to be the flagship line and top the list, unless they develop more Epique models in the future. The Sig, UM2, and MX are not as wide of bandwidth. The Sig is a close second in the hierarchy, preferences and costs aside.
BTW, the MX are like a still well running program car. Affordable, cheaper, but still point a to b doable. I place them like a UM1 with less power handling ability.
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Dang, that was fast.
I imagine that beast will perform admirably in a well designed guide
Uh oh, i must resist though price tag definitely a deterrent, guess keep an eye out post voice coil review heh.
Reduces worry about spending more on Xover parts… 
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These might be fun. Add a little baffle step and stay off axis and you might be ok.
Oh, a 6” version could be fun….
Some new Dayton 5 1/4 and 6 1/2 inch dvc high excursion max-x subs. Some competition for Tang Band. Didn’t realize this line had a shorting ring
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Those look promising, to be honest. When I get home I may do some modeling and see whats what. If I get curious enough, I’ll order one.
I do have a TB 6.5” sitting around doing nothing, maybe someone will want to buy that so I can justify buying another driver.
Chris Perez showed me and some others the 6.5” proto at the SDC back in August. These have a nicer look than it did. The DCS165 was PE first attempt at taking the long-stroke 5&6 title from TB. These appear a better attempt. I want to see an 8” model too. 
I’m curious as to why the 5” is more sensitive than the 6”? The DVC operation is wise, as TB have fewer wiring options. Both are ~85dB at 100Hz, which seems higher than TB spec. I like that they are MX models.
I’ll model these up too when I get a chance.
Oah my, nice looking FR and built-in bsc. Aluminum peak at 4khz. Seems promising for a woofer option in a 3-way… A small bookshelf 3-way. Gonna need PRs though… Or turn the port into the speaker stand 
The 5” shows some promise using the Dayton 8” DSA passive radiator, 0.375 cubes, and 100 grams added mass. Only takes 30 or so watts before breaching Xmax, however.
I wasn’t too happy with the 6.5” modeling, but it would probably be alright in a similar alignment honestly. Same enclosure, same passive tuning yields a very slightly lower extension but this driver will handle at least 70 watts so is capable of quite a bit more output. Both alignments have a peak around 35 hz of a db and a half, which is not necessarily a bad thing for a small woofer.
Overall, I think they would be better off used in multiples where you can Eq the shit out of them to hit a desired response. The problem is, using them in multiples quickly adds up to using a real subwoofer, cost-wise, that would smoke these in output.
Definitely a niche driver IMHO. YMMV.
These new? High-End Loudspeaker Parts | DIY Speaker Components | Madisound
Noticed VanceD(loudspk) unloading some other test sample glass cone woofer Pair (2) Gait Technology BGW-D182-86-001 Glass Cone 6.5” woofers | eBay and had mentioned Seas also tinkering with glass diaphragms.
I know the 5” Tang Band models nicely with the SB 5x8 racetrack PR, so it will be interesting to try that with the 5” Dayton MX.
The thing I find odd from the get-go is the impedance curve vs. the stated voice coil inductance (Le). The Dayton Le’s are considerably higher than the corresponding Tang Band, but the impedance curves are very similar. I was hoping maybe the aluminum sleeve in the Dayton would help more with the high frequency impedance, but I guess they should still work pretty well for a full range stand mount output limited 3-way. With the right PR or high pass filter, the output limitation might not be too much of an issue.