Gjhallerhorn v2 or Submaximus for pair of Uxl's - Page 2 - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 162Likes
Reply
 
Thread Tools
post #31 of 248 Old 04-26-2015, 01:44 PM
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,262
Mentioned: 872 Post(s)
Tagged: 1 Thread(s)
Quoted: 2992 Post(s)
Liked: 3731
"I'm intrigued, do continue. Is this something you've been on for a while or did we peak your interest enough to draw this up?"


with what we learned about de-tuning high inductance drivers for horn modeling (thanks primarily to diy speaker guy), i thought it was about time to go ahead and redo-Submaximus. this one has a similar fold pattern as the f20 but this one is MUCH larger. it is huge actually. not meant to go after the very lowest notes, i still think the ported are best when that is the goal (i wouldn't be surprised to see this one get strong response down to around 16-17hz in room, even with a protective high pass, but that will depend on the room).


i lack any more creativity, so this one shall be known as...SUBMAXIMUS V3 UXL.

Listen. It's All Good.

Last edited by LTD02; 04-27-2015 at 12:29 PM.
LTD02 is offline  
Sponsored Links
Advertisement
 
post #32 of 248 Old 04-26-2015, 02:02 PM
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,262
Mentioned: 872 Post(s)
Tagged: 1 Thread(s)
Quoted: 2992 Post(s)
Liked: 3731
and same driver (detuned as well, and showing inductance effects) in a ~15 c.f. ported cab tune a little under 20hz driven with same 2kw power. looks like this horn is good for about 5-6db across most of the range. since it will be asked, dark red line is 5.5 cubic footer sealed. 2kw same motor detuning. hits just over xmax in this size cab with that power.





edit: this is slightly different from the picture that I had posted previously. this one includes a little larger ported cab to give a small 'peak' around the tuning frequency and represents about as much spl as one can get out of the ported cab from the uxl/2kw combination.
Attached Thumbnails
Click image for larger version

Name:	submaximus v3 horn vs same driver detuned as well in ported cab 2kw sealed 5.5cf 2kw.png
Views:	4377
Size:	46.5 KB
ID:	689401  

Listen. It's All Good.

Last edited by LTD02; 04-27-2015 at 12:21 PM.
LTD02 is offline  
post #33 of 248 Old 04-26-2015, 02:09 PM
 
Mfusick's Avatar
 
Join Date: Aug 2002
Location: Western MA
Posts: 29,681
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked: 2729
I'm getting horny
homeskizzle and STL D like this.
Mfusick is offline  
Sponsored Links
Advertisement
 
post #34 of 248 Old 04-26-2015, 03:17 PM
AVS Forum Special Member
 
diy speaker guy's Avatar
 
Join Date: Jan 2011
Posts: 1,416
Mentioned: 42 Post(s)
Tagged: 0 Thread(s)
Quoted: 510 Post(s)
Liked: 525
Quote:
Originally Posted by LTD02 View Post
looks like this horn is good for about 5-6db across most of the range.
After you factor in power and port compression, probably quite a bit more than shown.

For those that don't know (LTD knows) if you want a lot of gain over a ported box, the horn has to be a lot bigger than a ported box. And power and port compression means the ported box will suffer losses much higher than the horn at high output levels, so even if they sim at the same level when shown at xmax the horn will ultimately win in real life. This isn't something you can see in the sim but you will see it in measurements.

This sim is quite a bit bigger than the one I showed a couple of posts ago, and for that reason it's a lot better than mine if you can afford the space. The extra size improves the gain AND requires less power to hit xmax, win win. Bigger is better. Even bigger than shown here would be even better but at this size you quickly start getting into diminishing returns, so this is probably a good size to stick with, especially if LTD is willing to go to the trouble of folding and providing plans. It's a whole lot bigger than Ghorn but that's what it's going to take to make this driver really shine. Original Submaximus was fine IMO, this is a lot better.
diy speaker guy is offline  
post #35 of 248 Old 04-27-2015, 11:26 AM
AVS Forum Special Member
 
asarose247's Avatar
 
Join Date: Mar 2010
Location: DIY enabled in SoCal / OC
Posts: 4,487
Mentioned: 106 Post(s)
Tagged: 2 Thread(s)
Quoted: 1265 Post(s)
Liked: 1109
I've got to re-run REW wrt the inuke6KDSP for MAX, (and the new L/C/R combo), which now sits nearfield, 3 ft mol , In back of my couch
Even tho it sits 'almost" centered in the initial 14.5 x 28 ish space
Edge of Tomorrow, Gravity, games, GTA, Prometheus, etc.


to quote another guy who hangs out around here: It's all good


size? of V3 .. curious

DIY FAN Denon X4400 , ATI A 2000 for 7.4.6 SCATMOS Sammy 82" 4K/HDR
L/R: Fusion 15 V2 , C: 88 Special , SL/SR: 88 Special(V2) , RL/RR: F-3, TF/TR: Volt 6's TM: SLX, FH: F4Q4
SUBMAXIMUS V2, ,Submaximus V3,LOWARHORNCustom Dual Driver VBSS,2 x 6000DSP
asarose247 is offline  
post #36 of 248 Old 04-27-2015, 11:43 AM
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,262
Mentioned: 872 Post(s)
Tagged: 1 Thread(s)
Quoted: 2992 Post(s)
Liked: 3731
Quote:
Originally Posted by asarose247 View Post
size? of V3 .. curious

25.5" x 36" x 80"

Listen. It's All Good.
LTD02 is offline  
post #37 of 248 Old 04-27-2015, 11:49 AM
 
Mfusick's Avatar
 
Join Date: Aug 2002
Location: Western MA
Posts: 29,681
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked: 2729
Quote:
Originally Posted by diy speaker guy View Post
After you factor in power and port compression, probably quite a bit more than shown.

For those that don't know (LTD knows) if you want a lot of gain over a ported box, the horn has to be a lot bigger than a ported box. And power and port compression means the ported box will suffer losses much higher than the horn at high output levels, so even if they sim at the same level when shown at xmax the horn will ultimately win in real life. This isn't something you can see in the sim but you will see it in measurements.

This sim is quite a bit bigger than the one I showed a couple of posts ago, and for that reason it's a lot better than mine if you can afford the space. The extra size improves the gain AND requires less power to hit xmax, win win. Bigger is better. Even bigger than shown here would be even better but at this size you quickly start getting into diminishing returns, so this is probably a good size to stick with, especially if LTD is willing to go to the trouble of folding and providing plans. It's a whole lot bigger than Ghorn but that's what it's going to take to make this driver really shine. Original Submaximus was fine IMO, this is a lot better.
This is what I was thinking. Reality is funny like that.
Mfusick is offline  
post #38 of 248 Old 04-27-2015, 05:27 PM
AVS Forum Addicted Member
 
BassThatHz's Avatar
 
Join Date: Apr 2008
Location: Northern Okan range (NW Cascades region)
Posts: 10,933
Mentioned: 239 Post(s)
Tagged: 0 Thread(s)
Quoted: 3832 Post(s)
Liked: 4333
The air speed with horns is nearly non-existent until you push north of 120db @ 2M below 25hz.

Even though I haven't yet cut the side out of my horn's mouth, thus reducing it's surface area by 33%, it still doesn't have much of a problem even with this crippling.
Obviously if you want the Nth degree of performance then you'd cut the box Nthly precise as the design calls for.
Eventually I might man-up enough to jigsaw the side out, but even then, I'm not expecting any major change in performance.
BassThatHz is offline  
post #39 of 248 Old 04-29-2015, 09:35 AM
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,262
Mentioned: 872 Post(s)
Tagged: 1 Thread(s)
Quoted: 2992 Post(s)
Liked: 3731








- the internal panels are 24" wide (slightly less from rip cutting won't matter)


- the "braces/brackets" showing the measurements are for the internal air space.


- good bracing is required.


- i'm not sure if the black diagonal deflector at 14/15 actually does anything other than serve as a brace.


- side panels are 36" x 80". best practice would be to draw the panel layout onto a side piece.


- the measurements will vary by a slight amount depending on the precise thickness of the wood panels ("three quarter inch plywood" in many cases is 23/32). that won't affect performance in any way, just be aware of it where you want the panels to line up just right (on the outside of the cab for example).


- try to get measurement 1 as close as possible to 3.23 inches. that measurement sets the "compression ratio", which for this horn is actually pretty low, so there is actually some wiggle room there. but still, if only one measurement on the entire horn is 'perfect', that should be it.


- a removable panel could be cut in the side for access to the driver if that is desired.


- this aspect of the design process actually required the most time/work. if somebody could double check these measurements, i'd appreciate it.
Attached Thumbnails
Click image for larger version

Name:	Submaximus V3 April 2015 measurement diagram.png
Views:	4893
Size:	39.1 KB
ID:	692650   Click image for larger version

Name:	Submaximus V3 April 2015 measurements panels.png
Views:	4843
Size:	8.1 KB
ID:	692666   Click image for larger version

Name:	Submaximus V3 April 2015 measurements horn.png
Views:	4830
Size:	11.3 KB
ID:	693114  
kingpin111, ORIF and Boomassiv like this.

Listen. It's All Good.

Last edited by LTD02; 04-29-2015 at 01:50 PM.
LTD02 is offline  
post #40 of 248 Old 04-29-2015, 11:16 AM
Member
 
Join Date: Dec 2014
Location: Sacramento Delta
Posts: 198
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 98 Post(s)
Liked: 51
Is measurement 1 centered on driver or where it intersects with H?
Doradoguy is offline  
post #41 of 248 Old 04-29-2015, 12:41 PM
 
Mfusick's Avatar
 
Join Date: Aug 2002
Location: Western MA
Posts: 29,681
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked: 2729
ltd02 !

I think sometimes John is not real. He's a computer program designed by AVS for people to make wise DIY decisions.
kevings likes this.
Mfusick is offline  
post #42 of 248 Old 04-29-2015, 01:15 PM
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,262
Mentioned: 872 Post(s)
Tagged: 1 Thread(s)
Quoted: 2992 Post(s)
Liked: 3731
Quote:
Originally Posted by Doradoguy View Post
Is measurement 1 centered on driver or where it intersects with H?

measurement 1 is centered on the driver.





Quote:
Originally Posted by Mfusick
I think sometimes John is not real. He's a computer program...

;-)

Listen. It's All Good.
LTD02 is offline  
post #43 of 248 Old 04-29-2015, 01:19 PM
AVS Forum Special Member
 
asarose247's Avatar
 
Join Date: Mar 2010
Location: DIY enabled in SoCal / OC
Posts: 4,487
Mentioned: 106 Post(s)
Tagged: 2 Thread(s)
Quoted: 1265 Post(s)
Liked: 1109
For giggles i tried the data in Maxcut as I am sketchup illiterate but
I have been unable to enter a standard 4 x 8 sheet size . . . but i did it 3 weeks ago wrt my fusion 15 build
is this something that makes the freeware version a POS after 1 use
I saved my work anyway
so if somebody can clue me in wrt where to look and what to do to make the change from the default 108 x 72 ( a Whole Lotta Sheet!)(that would be why NO LOVE)
I'll revisit the attempt

looks like a simple easy 1 week build . . .

DIY FAN Denon X4400 , ATI A 2000 for 7.4.6 SCATMOS Sammy 82" 4K/HDR
L/R: Fusion 15 V2 , C: 88 Special , SL/SR: 88 Special(V2) , RL/RR: F-3, TF/TR: Volt 6's TM: SLX, FH: F4Q4
SUBMAXIMUS V2, ,Submaximus V3,LOWARHORNCustom Dual Driver VBSS,2 x 6000DSP
asarose247 is offline  
post #44 of 248 Old 04-29-2015, 01:34 PM
AVS Forum Special Member
 
asarose247's Avatar
 
Join Date: Mar 2010
Location: DIY enabled in SoCal / OC
Posts: 4,487
Mentioned: 106 Post(s)
Tagged: 2 Thread(s)
Quoted: 1265 Post(s)
Liked: 1109
While not necessarily just for anyone,
anybody in the
socal area, (hours drive from me) that might like to come build one (i have some resources-but you get to help and pay ) of MAXXX use your own driver and then take it home,
sure way cool , kinda like the rotary sub thing, look what "I" did
but
DO THE WORK TO SHOW
YOU
OWN
IT!!!

DIY FAN Denon X4400 , ATI A 2000 for 7.4.6 SCATMOS Sammy 82" 4K/HDR
L/R: Fusion 15 V2 , C: 88 Special , SL/SR: 88 Special(V2) , RL/RR: F-3, TF/TR: Volt 6's TM: SLX, FH: F4Q4
SUBMAXIMUS V2, ,Submaximus V3,LOWARHORNCustom Dual Driver VBSS,2 x 6000DSP
asarose247 is offline  
post #45 of 248 Old 04-29-2015, 02:43 PM
 
Mfusick's Avatar
 
Join Date: Aug 2002
Location: Western MA
Posts: 29,681
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked: 2729


15db at 20hz. Sure I would take it.

Did you compare the HST to the UXL for haha ? I am assuming the HST would be peakier ...
Mfusick is offline  
post #46 of 248 Old 04-29-2015, 03:28 PM
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,262
Mentioned: 872 Post(s)
Tagged: 1 Thread(s)
Quoted: 2992 Post(s)
Liked: 3731
one bracing strategy--single row of 6" braces down the center of the cab. two rows might be even better, but more work. doubling up on the first brace in front of the driver might not be a bad idea.





cut sheet layout suggests 4 sheets may be possible.


Attached Thumbnails
Click image for larger version

Name:	submaximus v3 cut sheet plan.png
Views:	3835
Size:	26.6 KB
ID:	693346   Click image for larger version

Name:	Submaximus V3 April 2015 one bracing strategy.png
Views:	3813
Size:	17.9 KB
ID:	693354  

Listen. It's All Good.
LTD02 is offline  
post #47 of 248 Old 04-29-2015, 03:53 PM
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,262
Mentioned: 872 Post(s)
Tagged: 1 Thread(s)
Quoted: 2992 Post(s)
Liked: 3731
Quote:
Originally Posted by Mfusick View Post

Did you compare the HST to the UXL for haha ? I am assuming the HST would be peakier ...
using the same de-tuning procedure, the hst18 (light gray) is showing this (same 2kw power):
sealed response model is in purple (9 cubic feet, 2kw power)




i'm not quite sure how to think about it. the fact that this is a giant front loaded horn with a low compression ratio is really helping, but it seems like even with all that, it doesn't look quite as good as one might hope. maybe best to use that driver in a big ported or sealed cab.
Attached Thumbnails
Click image for larger version

Name:	same detuning procedure for hst18 - gray line - not rec.png
Views:	2099
Size:	62.8 KB
ID:	693410  

Listen. It's All Good.

Last edited by LTD02; 04-29-2015 at 04:05 PM.
LTD02 is offline  
post #48 of 248 Old 04-29-2015, 05:17 PM
AVS Forum Special Member
 
WereWolf84's Avatar
 
Join Date: May 2011
Posts: 1,150
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 416 Post(s)
Liked: 176
John,

How does the Submaximus compare to Ghorn/Othorn/JTR OS?

Last edited by WereWolf84; 04-29-2015 at 05:29 PM.
WereWolf84 is offline  
post #49 of 248 Old 04-29-2015, 06:33 PM
 
Mfusick's Avatar
 
Join Date: Aug 2002
Location: Western MA
Posts: 29,681
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked: 2729
Quote:
Originally Posted by LTD02 View Post
using the same de-tuning procedure, the hst18 (light gray) is showing this (same 2kw power):
sealed response model is in purple (9 cubic feet, 2kw power)




i'm not quite sure how to think about it. the fact that this is a giant front loaded horn with a low compression ratio is really helping, but it seems like even with all that, it doesn't look quite as good as one might hope. maybe best to use that driver in a big ported or sealed cab.
It kind of looks like I was expecting.

For haha you should also overlay the LMS at full power and NO tweaking (because it doesn't need it).
Mfusick is offline  
post #50 of 248 Old 04-29-2015, 07:35 PM
d_c
AVS Forum Special Member
 
d_c's Avatar
 
Join Date: Feb 2010
Location: KCMO
Posts: 2,807
Mentioned: 247 Post(s)
Tagged: 0 Thread(s)
Quoted: 1183 Post(s)
Liked: 1615
I like where this is going. This is the exact measurements of the ported box I drew up for an hs24. What would the mouth cutout look like coming out of the 36" side in case one had a baffle wall space of 30" deep? Does it only need the same area of opening?
d_c is offline  
post #51 of 248 Old 04-29-2015, 08:28 PM
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,262
Mentioned: 872 Post(s)
Tagged: 1 Thread(s)
Quoted: 2992 Post(s)
Liked: 3731
Quote:
Originally Posted by Mfusick View Post
It kind of looks like I was expecting.

For haha you should also overlay the LMS at full power and NO tweaking (because it doesn't need it).

horns can be tricky. i'd design the horn differently for the lms. with the lms gone, not much point in doing so though.


black is lms (no-detuning on that one) with 2kw power. light gray is uxl (detuned motor).


Attached Thumbnails
Click image for larger version

Name:	lms.png
Views:	2076
Size:	47.3 KB
ID:	693826  

Listen. It's All Good.
LTD02 is offline  
post #52 of 248 Old 04-29-2015, 08:59 PM
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,262
Mentioned: 872 Post(s)
Tagged: 1 Thread(s)
Quoted: 2992 Post(s)
Liked: 3731
Quote:
Originally Posted by d_c View Post
I like where this is going. This is the exact measurements of the ported box I drew up for an hs24. What would the mouth cutout look like coming out of the 36" side in case one had a baffle wall space of 30" deep? Does it only need the same area of opening?
hhmm...many moons ago, somebody asked a similar question and i mocked up something like this.




it would be the simplest answer, just change all the depth measurements to width measurements and the area through the horn remains the same. the problem is driver spacing.


so that goes back to your question of side firing. this one has an assymetrical trapezoid exit that has the same area as the front firing. my guess is the effective path length is slightly shorter going that route, but i can't think of any reason why it wouldn't work.


maybe some other folks can share thoughts.








another option is to simply fire the horn to the side (either into a deflector or not).


of course, total devastation could be created by aiming a pair at each other. :-)
Attached Thumbnails
Click image for larger version

Name:	manymoonsago.png
Views:	2904
Size:	12.4 KB
ID:	693834   Click image for larger version

Name:	sidefiringmax.png
Views:	2389
Size:	15.9 KB
ID:	693842   Click image for larger version

Name:	sidefiringmax 2.png
Views:	2928
Size:	242.2 KB
ID:	693850  

Listen. It's All Good.
LTD02 is offline  
post #53 of 248 Old 04-29-2015, 09:13 PM
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,262
Mentioned: 872 Post(s)
Tagged: 1 Thread(s)
Quoted: 2992 Post(s)
Liked: 3731
of course, if you were to do one that way, you would have to do four. kind of like the danley--it starts to form its own wall and each driver feeds 1/4 of the bubble in front of the cab, so it sort of works like corner loading, sort of. i'm not sure if 140 db at 18hz is out of the question with something like this.


Attached Thumbnails
Click image for larger version

Name:	4xdanleyconcept.png
Views:	1998
Size:	451.3 KB
ID:	693858  

Listen. It's All Good.
LTD02 is offline  
post #54 of 248 Old 05-10-2015, 02:41 PM
Senior Member
 
JackNC's Avatar
 
Join Date: Aug 2011
Posts: 436
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 146 Post(s)
Liked: 40
My inquiring mind wanted to know so I tried the UM18-22 in Submaximus v3 UXL. First I just changed the driver specs, then I reduced the rear chamber volume to 123. The results are impressive. Its not quite as good as the UXL comparing sims without inductance correction. With correction on the UXL sim and assuming um18 doesn't need it, the cheaper driver may come out on top. I'm not comfortable with the correction process, so I will leave that to others.
Attached Thumbnails
Click image for larger version

Name:	SubmaxV3 w UM18.jpg
Views:	1990
Size:	73.3 KB
ID:	710170   Click image for larger version

Name:	SubmaxUlti Excursion.jpg
Views:	231
Size:	66.0 KB
ID:	710178  
JackNC is offline  
post #55 of 248 Old 05-11-2015, 09:32 AM
 
Mfusick's Avatar
 
Join Date: Aug 2002
Location: Western MA
Posts: 29,681
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked: 2729
You need to embed those photos so I can see them.
Mfusick is offline  
post #56 of 248 Old 05-11-2015, 10:16 AM
AVS Forum Special Member
 
asarose247's Avatar
 
Join Date: Mar 2010
Location: DIY enabled in SoCal / OC
Posts: 4,487
Mentioned: 106 Post(s)
Tagged: 2 Thread(s)
Quoted: 1265 Post(s)
Liked: 1109
^


+1

DIY FAN Denon X4400 , ATI A 2000 for 7.4.6 SCATMOS Sammy 82" 4K/HDR
L/R: Fusion 15 V2 , C: 88 Special , SL/SR: 88 Special(V2) , RL/RR: F-3, TF/TR: Volt 6's TM: SLX, FH: F4Q4
SUBMAXIMUS V2, ,Submaximus V3,LOWARHORNCustom Dual Driver VBSS,2 x 6000DSP
asarose247 is offline  
post #57 of 248 Old 05-11-2015, 10:23 AM
 
Mfusick's Avatar
 
Join Date: Aug 2002
Location: Western MA
Posts: 29,681
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked: 2729
so basically you did the picture posting right, but only did the first half of what you need to do.

After you upload them using AVS as the host site- you open the links for the pictures in a new browser or browser tab.

Example: https://www.avsforum.com/forum/attach...0&d=1431290457

You then copy the web address for the picture^

Add [IMG] before it and [/img] after it. (caps don't matter)

[img] + https://www.avsforum.com/forum/attach...0&d=1431290457 + [/img]

If you do it without spaces you get this:




No one with a mobile device wants to click picture links and navigate back and forth - it's too hard. So I just ignore them.

This is the first time I am seeing this. Since I embed it. I'm too lazy to click the little ones and bother navigating back and forth, and I suspect many others are too. If you embed them- then all can see them. And in fact- people no longer have the choice to see them or not- they are forced to see them. That should get most response and insight into them generally too.
LTD02 and rfbrang like this.
Mfusick is offline  
post #58 of 248 Old 05-11-2015, 10:48 PM
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,262
Mentioned: 872 Post(s)
Tagged: 1 Thread(s)
Quoted: 2992 Post(s)
Liked: 3731
good tip.

Listen. It's All Good.
LTD02 is offline  
post #59 of 248 Old 05-11-2015, 11:02 PM
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,262
Mentioned: 872 Post(s)
Tagged: 1 Thread(s)
Quoted: 2992 Post(s)
Liked: 3731
thanks jack for pointing out the um. here it is again, this time with the uxl vs the um18. the um probably doesn't need much motor detuning for modeling as its inductance isn't too high and appears to be pretty well controlled from what i've seen so far.


uxl in gray. um18 in black. both at 80 volts (approx. 1600 watts or so--a little more into the uxl as its re is a little lower). protective high pass would be advised in both cases. uxl has about 3-4db more output across most of the bass. the um may work, but its motor is already kind of weak relative to its moving mass and that hampers the upper end of the bass (though who knows what that actually is given the measurement discrepancy between what josh measured and the official parts express numbers). this is with the parts express t/s parameters. maybe we can take another look using josh's numbers....


Attached Thumbnails
Click image for larger version

Name:	um vs uxl.png
Views:	1910
Size:	22.3 KB
ID:	712074  
joebuddyguy likes this.

Listen. It's All Good.
LTD02 is offline  
post #60 of 248 Old 05-12-2015, 07:23 AM
Senior Member
 
JackNC's Avatar
 
Join Date: Aug 2011
Posts: 436
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 146 Post(s)
Liked: 40
Hi LTD:
Thanks for turning your expert eye on this. I can run the tools but I don't always know what to make of the output. It sounds like you have some concerns about how a build with the UM might turn out, based on your "it may work" comment. Except for that, if one were happy with slightly less output, it seems an easy choice as the UM is 1/3rd the price and readily available.
Jack
JackNC is offline  
Sponsored Links
Advertisement
 
Reply DIY Speakers and Subs

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off