Kevon that is not really the sort of thing that we do here. There are plenty of reviews and builds with them on the DIY forums. The flat packs are simple sealed boxes of 4 cu ft or 3 cu ft depending on the size of the drivers and throw the driver of choice in there and provide the amp of your choice. What we would test here is the drivers in a variety of boxes and there are already sealed enclosure sizes on hand that are close to the volume of the flatpack enclosures.
Upcoming Testing Possibilities?
Posted 21 November 2013 - 06:01 PM
A copy and paste from the Ultimax18 thread at AVS. This is a response from Rory of Dayton Audio addressing a couple of points about this new driver.
Hi, a couple notes.
1) This driver has no relation to the Fi Audio car subwoofers except for using the same basket casting. If you want to break the bank when developing a driver, insisting on a custom tooled die-cast frame is an easy way, so most manufacturers use off-the-shelf basket castings, or open tooling for the die casting. The open-tooling 12-spoke "MTX-style" basket used for the other Ultimax drivers is only available in sizes from 8" thru 15", so we had to look around for an open-tooling 18" 12-spoke basket that would provide the most similar cosmetics and functionality to the other 18" Ultimax drivers. There have been at least a couple variations of 12-spoke 18" frames created that have open tooling (since opening the tooling is a way to reduce the cost of having the tooling made), and I know that this frame is shared by at least the Fi Audio car subwoofers, but SSA Audio is another company that is using a different 18" 12-spoke basket. This doesn't indicate a tie to a particular build house, and I have not investigated where the Fi Audio drivers are made.
2) The Ultimax 18" model uses aluminum shorting rings instead of copper, again to avoid breaking the bank on details and to enable us to be very competitive on pricing. The aluminum shorting rings provide very nearly the same effectiveness for inductance control as copper, at least in this design, such that the extra cost of copper shorting rings was not justifiable. Most of the extra inductance comes from the larger and much longer coil than the other Ultimax models (10" thru 15").
Glad to see all the interest in these drivers.
Rory Buszka - Product Manager
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Posted 13 December 2013 - 04:13 PM
Thought I might add a bit here...Things are piling up...Seems like the same thing happened last holiday season.
I have a couple more commercial powered subs to review for Audioholics that just came in...
I ordered a Dayton UM-18 out of pocket for testing.
There is another commercial sub on loan from a forum member that I'm not going to talk about until it gets tested but it should be interesting.
I should also have a Sundown Zv4 18" on hand eventually.
Stereo Integrity is sending me their wee little 24" driver. Gotta build a cab for that thing...
Nick at Stereo Integrity also sent me this happy little guy...
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Posted 13 December 2013 - 06:14 PM
Man - you get to play with all the big toys...
My checkbook says I can only play with pea shooters, but I do have some of those on hand to play with.
I'll be testing the Sundown Ev2 10s soon. For the money, they're a meaty driver. Lots of motor, decent clearances, and they look to be well-built.
I hope that the specs I get are similar to the published ones, if so they'll be a great little driver for an 8 cubic-foot tapped horn I have drawn up.
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Posted 13 December 2013 - 10:57 PM
Josh, is the "happy little guy" the Schlafly Kölsch, or the fat tire surround ... subwoofer?
what's the SI driver in the pic? I'm not familiar with it, but that's some surround ...
Looking forward to your Audioholics reviews, always solid stuff there.
Posted 16 December 2013 - 04:34 PM
The SI driver is their prototype of the new upper scale home theater line. It uses some of the parts developed for the Sundown ZV4 series which is targeted more at car audio but also has notable differences like a much softer suspension and lower resonance for instance. They will probably be around the $600 mark for the 18" but things aren't finalized just yet.
Yes it is a big driver and the surround is absurd looking. Imagine what it looks like on a 15".
Posted 18 December 2013 - 02:41 AM
A surround like that is kind of needed. Look at the LMS for example. The surround inhibits outward excursion beyond about 31mm or so iirc, doesn't even come close to meeting the published specs. I look forward to seeing what they do with these and the talk of a higher bl 21 or 24" is quite interesting.
Posted 20 December 2013 - 03:13 PM
I wonder the same thing about TC sometimes. They have been really quiet for the last few years. Other than PE selling them you wouldn't hear anything. Those same driver designs have been produced for quite a few years now. I know they are working on new drivers and amps, etc...But that was mentioned years ago. Who knows.
Posted 30 December 2013 - 04:45 PM
I was talking with Nick from SI and he said that he and Jake actually inquired with the surround vendor about a 24" version of the new surround and the vendor said "No we cannot make it. Regardless of the tooling costs". I asked if they asked the vendor about a 21" surround then, but he said they did not. I haven't seen the surround on the 24" yet but it is pretty darn big to begin with much wider than the ones used on 18's like the UXL or Fi stuff so it should allow some extra to begin with.
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