12" JBL speaker $29 on black friday at Bestbuy - Page 80 - AVS Forum | Home Theater Discussions And Reviews
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post #2371 of 2698 Old 07-26-2019, 11:53 AM
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Originally Posted by Roccoman View Post
I know this is OT, but I am having a hard time finding the info for the inuke fan mod. Anyone with better search skills could lend a hand? I've just picked up a NX6k if it matters.

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Roccoman, I have a little writeup about the fan swap on a nu6000 in my sub build thread, page 4. Link in my sig, or below:


https://www.avsforum.com/forum/155-d...d-plans-4.html
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post #2372 of 2698 Old 07-26-2019, 01:03 PM
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Quote:
Originally Posted by OJ Bartley View Post
Roccoman, I have a little writeup about the fan swap on a nu6000 in my sub build thread, page 4. Link in my sig, or below:


https://www.avsforum.com/forum/155-d...d-plans-4.html
Thank you sir!

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post #2373 of 2698 Old 07-27-2019, 01:04 PM
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Bought a few. Have zero plans for them, though! haha
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post #2374 of 2698 Old 07-30-2019, 09:33 PM
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Originally Posted by doodoobutter View Post
They're so cheap, I think everyone would be better off doing a ton of them sealed. Easier to build than ported.
I've not read through all 80 pages of this thread (but at least 20 of them) so I'm sorry if this has been mentioned but is there any kind of consensus on sealed box size? I've seen a few posts mention 1.2-1.7 cu. ft. per driver, but what kind of bottom end is there with that size? Are people able to get solid, sub-20hz performance with that size sealed?
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post #2375 of 2698 Old 07-30-2019, 10:15 PM
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Only if you eq the bajezus out of them. That's kinda the point; good, low distortion driver, cheap... use a ton and eq to hell.

I like them 1.5 cuft and above each, but if you have enough that doesn't matter as much. Use twice as many as you think you need. I wouldn't go below 1 cuft each pretty much no matter what, I think around 1.2 is where it starts to be ok.

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post #2376 of 2698 Old 07-30-2019, 10:31 PM
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Originally Posted by Chris Popovich View Post
I like them 1.5 cuft and above each, but if you have enough that doesn't matter as much. Use twice as many as you think you need. I wouldn't go below 1 cuft each pretty much no matter what, I think around 1.2 is where it starts to be ok.

Chris


For the recommended box sizes, are you talking about the gross box volume? Or the net after you've subtracted the driver and bracing volume?
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post #2377 of 2698 Old 07-30-2019, 11:00 PM
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Net.
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post #2378 of 2698 Old 07-31-2019, 06:25 AM
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post #2379 of 2698 Old 07-31-2019, 08:41 AM
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Originally Posted by Chris Popovich View Post
Only if you eq the bajezus out of them. That's kinda the point; good, low distortion driver, cheap... use a ton and eq to hell.

I like them 1.5 cuft and above each, but if you have enough that doesn't matter as much. Use twice as many as you think you need. I wouldn't go below 1 cuft each pretty much no matter what, I think around 1.2 is where it starts to be ok.

Chris
That is what I was hoping to hear. I have 6 cuft of internal space available under a couch so 4 of these subs would just fit.

Thanks.
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post #2380 of 2698 Old 07-31-2019, 08:55 AM
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Quote:
Originally Posted by OJ Bartley View Post
Roccoman, I have a little writeup about the fan swap on a nu6000 in my sub build thread, page 4. Link in my sig, or below:


https://www.avsforum.com/forum/155-d...d-plans-4.html

I believe I used this as a reference when I did my fan swap and it was very easy (and worthwhile).
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post #2381 of 2698 Old 07-31-2019, 09:25 AM
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Originally Posted by TooHappy View Post
I've not read through all 80 pages of this thread (but at least 20 of them) so I'm sorry if this has been mentioned but is there any kind of consensus on sealed box size? I've seen a few posts mention 1.2-1.7 cu. ft. per driver, but what kind of bottom end is there with that size? Are people able to get solid, sub-20hz performance with that size sealed?
I'm running 8 of them right now (soon to be 18). As mentioned before, they will definitely hit 20Hz and below, but you have to EQ them to get that (boost the low end). I had to do that to my two sealed UM18-22's as well so I don't feel bad about it one bit. The end result is flat to 20Hz with a nice house curve so it's all good.
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post #2382 of 2698 Old 07-31-2019, 09:35 AM
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Quote:
Originally Posted by OJ Bartley View Post
Roccoman, I have a little writeup about the fan swap on a nu6000 in my sub build thread, page 4. Link in my sig, or below:


https://www.avsforum.com/forum/155-d...d-plans-4.html
Thanks for linking that (and the original post on the fans).
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post #2383 of 2698 Old 07-31-2019, 04:34 PM
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Originally Posted by jcmccorm View Post
I'm running 8 of them right now (soon to be 18). As mentioned before, they will definitely hit 20Hz and below, but you have to EQ them to get that (boost the low end). I had to do that to my two sealed UM18-22's as well so I don't feel bad about it one bit. The end result is flat to 20Hz with a nice house curve so it's all good.
Two sets of 9 will get you well below 20Hz.
https://www.avsforum.com/forum/155-d...fer-array.html
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post #2384 of 2698 Old 08-01-2019, 08:50 AM
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Originally Posted by jcmccorm View Post
I'm running 8 of them right now (soon to be 18). As mentioned before, they will definitely hit 20Hz and below, but you have to EQ them to get that (boost the low end). I had to do that to my two sealed UM18-22's as well so I don't feel bad about it one bit. The end result is flat to 20Hz with a nice house curve so it's all good.
Has anyone tested the thermal limits of these things yet? Even a lowly 6dB boost is 4x the power. Doesn't take much to exceed the 250 watt rating, when boosting!
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post #2385 of 2698 Old 08-01-2019, 08:57 AM
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It's a thousand watts max, so there's plenty of headroom (when using many at once, which is the whole point).
I don't think anyone's blown one yet (unintentionally).

Michael
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post #2386 of 2698 Old 08-01-2019, 09:21 AM
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Originally Posted by LastButNotLeast View Post
It's a thousand watts max, so there's plenty of headroom (when using many at once, which is the whole point).
I don't think anyone's blown one yet (unintentionally).

Michael
No way in hell I'd put 1000 watts on one of these! I was running close to 250 the other night on one and it got warm.
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post #2387 of 2698 Old 08-01-2019, 10:17 AM
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Has anyone tested the thermal limits of these things yet? Even a lowly 6dB boost is 4x the power. Doesn't take much to exceed the 250 watt rating, when boosting!
I've put about 650 watts each to a few of them and that's enough to make them do some serious work. They start making some distressing sounds before I think you really run into trouble and everyone knows... if you have any care in your heart at all.... when you hear distress, ease up on the ol' girl(s).

The secret with these is to use vast numbers of them. You gain much more per watt, you have a TON of cone area, and you distribute that power over a lot of voicecoils. Don't think about it like "can this thing handle 20x the power" as much as realize that a dozen or two of them will get you over 100dB at 50hz with 1 watt. Yeah you still have to get nasty with eq. Doesn't matter. You'll be distributing a couple thousand watts over MANY 2" copper voice coils. Thermal issues just simply go away when you use a lot of them.

Now... if you think 4 is a lot, then you're not going to be (as) happy. 8, 9, minimum. Twice that starts getting real good. More if you're foolish like me.

Chris
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post #2388 of 2698 Old 08-01-2019, 11:14 AM
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Originally Posted by Chris Popovich View Post
I've put about 650 watts each to a few of them and that's enough to make them do some serious work. They start making some distressing sounds before I think you really run into trouble

Chris


Of course this depends on box size and type. But true for the guys putting them in 1ft boxes

Impressive, though... mine get warm with 250-300 watts on them.


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The secret with these is to use vast numbers of them. You gain much more per watt, you have a TON of cone area, and you distribute that power over a lot of voicecoils. Don't think about it like "can this thing handle 20x the power" as much as realize that a dozen or two of them will get you over 100dB at 50hz with 1 watt. Yeah you still have to get nasty with eq. Doesn't matter. You'll be distributing a couple thousand watts over MANY 2" copper voice coils. Thermal issues just simply go away when you use a lot of them.


Doesn't matter, though... 6dB is still 4x power from amp/to subs. If you're running 16 of them @ 200 watts each for a total of 3200 watts, then one day you want to boost 20hz by 6dB... all of a sudden you are requiring 12,800 watts from your amps and are giving each sub 800 watts @ 20hz.

I just don't want noobs(and other people who don't know) reading those "boost it" posts and thinking it's as simple as "boosting the hell out of it" down low and all will be okay.

Best scenario, if you're putting them into small boxes, is to probably run a ton of them and CUT the high frequencies to make it however flat you want it.
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post #2389 of 2698 Old 08-01-2019, 12:05 PM
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Originally Posted by lknhomeaudio View Post
Of course this depends on box size and type. But true for the guys putting them in 1ft boxes

Impressive, though... mine get warm with 250-300 watts on them.




Doesn't matter, though... 6dB is still 4x power from amp/to subs. If you're running 16 of them @ 200 watts each for a total of 3200 watts, then one day you want to boost 20hz by 6dB... all of a sudden you are requiring 12,800 watts from your amps and are giving each sub 800 watts @ 20hz.

I just don't want noobs(and other people who don't know) reading those "boost it" posts and thinking it's as simple as "boosting the hell out of it" down low and all will be okay.

Best scenario, if you're putting them into small boxes, is to probably run a ton of them and CUT the high frequencies to make it however flat you want it.

Eh, I think that's a pretty simplistic example that just doesn't play out in the real world the way we use them. Let me know how listening to 3200 watts in the non-boosted territory on 16 JBL's works out for you. I think you don't realize how efficient these things are, especially at those frequencies. It's going to be so far beyond anything reasonable that it just doesn't matter. Sealed boxes always have more output potential as freq increases, at least up to the thermal limits. If you have 16+ of these you're not going to find the thermal limits above 50hz unless you've really hosed up your room and/or phase or you're using them to put on a high-school dance in a gymnasium.

Boost low freq's. Cut the high freq's. Linkwitz transform them. Do a combination of all the above. Doesn't really matter as you're doing to adjust level the same for the same output across the same frequencies. You're not exceeding amplifier or thermal limits either way.... IF YOU HAVE ENOUGH OF THEM. Even my computer system has 4 and I was thinking about raising that number (why not?).

FWIW I tend to land somewhere around 150-250 watts per for most of the applications, and that's max . I listen loud, with a filthy room curve and sometimes use a subharmonic synth that adds up to 15 dB from 15-35hz, and even then they're so efficient I have to work to clip the crowns, definitely far, far past neighbors calling police territory, into visible wall deflection, visible waves in the leather couch, things falling off shelves in adjacent rooms. I once measured 110 dB outside my front door. I don't do that often, mind you, but sometimes everyone needs to listen to a little AC/DC.

So yes, as previously stated, get a bunch of them, eq the snot out of them with boost, cuts, boost and cuts, whatever, and have fun. It's a modest driver with good characteristics that becomes amazing when used in large numbers.
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post #2390 of 2698 Old 08-01-2019, 12:25 PM
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Just don't do that when they're $130!
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post #2391 of 2698 Old 08-01-2019, 12:49 PM
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I think you don't realize how efficient these things are, especially at those frequencies.
I do. I have some of them.

Just trying to prevent someone from buying 2 or 4 of them, putting them in sealed 2ft boxes, and expecting 115-120dB @ 20hz just by adding some boost down low (without room gain). We do have newcomers roll though, occasionally.

How many of them are you running, by the way?
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post #2392 of 2698 Old 08-01-2019, 01:03 PM
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I'm still building, but I have more than 40.
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post #2393 of 2698 Old 08-01-2019, 01:21 PM
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Originally Posted by LastButNotLeast View Post
Two sets of 9 will get you well below 20Hz.
https://www.avsforum.com/forum/155-d...fer-array.html
Pics when you're done!
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Yup. You're the reason I now have 18 of these drivers
Two sets of 9 connected to an NU6000 ought to be just right.
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post #2394 of 2698 Old 08-01-2019, 01:26 PM
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I'm still building, but I have more than 40.
Jesus! haha You currently running them all?
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post #2395 of 2698 Old 08-01-2019, 01:34 PM
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Not yet. Will be soon(ish). I'll post pics once they're worth sharing.
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post #2396 of 2698 Old 08-01-2019, 03:02 PM
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Originally Posted by jcmccorm View Post
Yup. You're the reason I now have 18 of these drivers
Two sets of 9 connected to an NU6000 ought to be just right.
Glad I'm an inspiration, though I can't wait to see what Chris comes up with.
FYI, I also have one mounted to the back of my chair:
https://www.avsforum.com/forum/19-de...l#post57990614
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post #2397 of 2698 Old 08-01-2019, 03:24 PM
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I'm in the process of building two manifolds of 6 each (12 total) for a cheap IB set up. I'll let you all know how it sounds once done.
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post #2398 of 2698 Old 08-01-2019, 05:39 PM
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Originally Posted by LastButNotLeast View Post
Glad I'm an inspiration, though I can't wait to see what Chris comes up with.
FYI, I also have one mounted to the back of my chair:
https://www.avsforum.com/forum/19-de...l#post57990614
Michael

I'm almost done assembling my first set of 9 I can't wait to fire it up. (and still trying to figure out how to sneak 9 more past the Mrs.)
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post #2399 of 2698 Old 08-04-2019, 07:44 PM
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I only got four.. I know crazy.. or maybe it's that I'm not. I had an RS18 that I enjoyed up to 40hz, but then it fizzled out. These solved that problem in spades. I had to EQ 65 to 80 down by 15 db, but I'm pretty flat down to 20. At least in the MLP.. I haven't really checked other seats. The bass also sounds much tighter. I'm rather pleased and the combo of the 18 and four 12s is plenty of bass for my taste. I don't think a minimum of 8 is necessary. They are pushed by one channel off an NX3000.

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post #2400 of 2698 Old 08-04-2019, 08:45 PM
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Having an 18 in the mix probably helps.
"Necessary" is definitely in the ear of the beholder. The point, I think, is that, for $30, you may as well go overboard.
Four is fine as a "magic square;" the next step up is to nine (3x3). Eight speakers are hard to wire together as far as the load on the amp is concerned.
I presume the 18 is on a separate channel than the 12s, and that you have some form of eq.
BTW, my nine 12s have replaced my two 15s, and are doing a much better job (and are nearfield ).

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