Ricci

Those 10" specs look pretty good. Is this with a 4 layer coil?

Ok gotcha. You will be putting together some drivers on the 6 spoke frame with the spider adapter and new cones/ soft parts though correct? What does the 6 spoke frame limit you to mechanically?

I tend to think that 1/3rd is a little more accurate but there are tons of companies that use 1/2 too. Either way the important thing is to keep that in mind when comparing SD from different companies. I've seen drivers with large differences in the listed SD but when you get them side by side they have the same surround and cone profile.

Jake, You didn't list the 18" frame dimensions above. Do you happen to have those? (Saw your proto's video BTW... Gotta break some eggs to make an omelet. )

Thanks for the detailed info. Looks like the larger drivers drop in for the most part. Awesome. Any plans for 4" coil drivers using these parts?

Jacob, I have always preferred a soft bottom design where the suspension runs out of travel while the motor has also lost a large percentage of its force. You can still break these of course but they are more forgiving of a few instances of abuse than allowing full linearity right up to the point that the former cracks into the back plate or the triple joint into the top plate. You mentioned the new surrounds being capable of more than the clearance built into the new frames which seems to imply that these may lead to a mechanical hard bottom design. Do you plan to limit the stroke through reduction in motor force at high excursion and the spiders chosen or simply by having such a large amount of excursion that it would rarely if ever be utilized? Combo of all 3? Tooling your own frames and surrounds is a big effort that most would not undertake. Not to mention having the balls to get your drivers Klippel tested and posting the results. I like your Zv3 and SA series and will definitely be grabbing a couple of your 18" drivers using these new parts when they are available. I believe I even heard something about a copper pole sleeve at some point...Keep up the good work. BTW how much does the current Zv3 surround support, 40mm? Because it is no slouch when it comes to displacing some air. One more question that you may have answered some where already...Are the new frames compatible with the cut-out diameter and hole pattern from the common frames? 12 spoke, 4 and 6 spoke( Zv3 style), TC/Ti type and TC LMSR/Axis style plus a few other frames are all close enough to drop right in for each other in most cases. Just wondering if these are off sized.

Thank you. Looks like it's the Xcon.

I'm looking at purchasing either an Xcon or a Zcon. The Xcon is listed as having an aluminum shorting ring in the motor. My question is whether the Zcon does or not? I am assuming that it does not have an inductance demodulation circuit in the motor since it is not listed under the features. Can anyone confirm this please? Thanks.

That's why I asked. You addressed the possible rocking issue and also the comments about the stud and depth addressed the depth and frame strength question. You also sort of hinted that the gap is not larger than normal and also not tiny. The spider set-up is more or less fairly standard, but up to the task. You didn't answer the questions I really cared about. About the coil arrangement, etc.. You know the meaty stuff..(I figured you wouldn't anyway. I tried. ) A nice flat BL curve is good...Surely you didn't mean that this particular drive has bl^2/re over 2000? That's got to be some theoretical or prototype deal you guys are working on. What is the BL rating and RE on this? Even 35tm with an RE of 2ohms would be kinda nuts.

These questions may have been answered before but a quick search did not turn up the obvious answers. I have 2 completely separate and very specific applications I'm looking at for 12" drivers (neither of which involve being inside a vehicle BTW) and I need a little bit more information to help in the decision making process. What is the motor OD on the Q series and the BTL (11.5" I think?) What is the overall depth of the 12" version of the Q and BTL? Also what is the motor only depth of both from the back of the frame? What is the generic xmech of both series? It's nearly the same I assume as baskets, vc od and suspensions are very similar. I figure about 35-36mm inward and that both are suspension limited (spider) soft bottom designs? The former will not contact the backplate without breaking something in the suspension first correct? How bad is the inductance roll off of the Q and BTL series with the aluminum shorting rings in place? Is there a hump in the 50-70hz range and if so how large in magnitude? Is there any information regarding the inductance of either of these drives that could be shared? A Klippel type LEx type measurement maybe? I'm interested in the possible roll off from 50hz into the 100-120hz range specifically. Also there has been a recomendation against using the BTL in a sealed enclosure application due to the high BL low Q design and the general SPL oriented design. There are however some very good sealed enclosure drivers that have moderate to high BL and low Q so that by itself is not a deal killer. Can the BTL be used in an application that does require accuracy of reproduction albeit at very loud and sometimes sustained levels (again not car audio)? thanks,

Any comments on some of the questions about compromises with this type of design brought up earlier? Any new news? It appears that the spider compliment/placement is the same as a usual single motor driver and with the extra long former, how is coil rock controlled at high excursion? Extra wide gap sacking back some of the force gained with the double motor approach? I also wonder about possible frame damage or misalignment issues with so many parts stacking up and the back motor able to leverage so much force on the basket in a horizontal position? I know you probably won't answer but is it a single very long vc wind/ single very long gap or is it a split coil/ separated double vc/ 2 separate magnetic gaps approach? Perhaps even a triple/quad split coil with 2 separate gaps(yeah right). I'm going to guess that it is 2 separate overhung type motor systems and gaps in tandem on a single cone. You mentioned a BL^2/RE of over 2800!...I can't think of a single driver available that is over 350 even and anything above 200 is pretty strong already in day to day use. At some point doesn't the magnetic gap become saturated? How in the hell...Super tiny gap?