My 11.4.12 "Franken-Atmos" living room. - Page 33 - AVS Forum | Home Theater Discussions And Reviews
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post #961 of 1038 Old 01-16-2020, 04:46 AM - Thread Starter
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Originally Posted by gpmbc View Post
I ordered 2 more SLAPs today so total of 6. I already had enough JBLs. Regarding slant, do you recline almost all the way back when you’re sitting? For cubic feet I’ll be at least 6 cubic feet total maybe a little more.
Ok, so 6 SLAPS and how many JBL’s then?

Yeah, i recline pretty much all the time when watching, but the clue is to find the best angle on the front of the box for both upright and reclined. My seat is a bit finicky in that department as they move both the upper shoulder part and the bottom back part, so i had to take a middle ground. Only talking about a couple inches wrong here, but VNF is supposed to be close, LOL.

6cu ft ? Is that total volume for all the box(es) intended or per box?

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post #962 of 1038 Old 01-16-2020, 08:10 AM
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12 JBLs, good to know regarding the angle. 6 cubic feet min for 4) JBLs so at least 1.5 cubic feet per driver.
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post #963 of 1038 Old 01-16-2020, 08:12 AM - Thread Starter
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Originally Posted by gpmbc View Post
12 JBLs, good to know regarding the angle. 6 cubic feet min for 4) JBLs so at least 1.5 cubic feet per driver.
Ok, sounds good then

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post #964 of 1038 Old 01-16-2020, 05:59 PM
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I know added mass is beneficial in a BOSS application for increased tactile response into single digits. Would mass added to the cones of the JBLs prove beneficial when used with the SLAPs?
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post #965 of 1038 Old 01-17-2020, 12:50 AM - Thread Starter
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^^^ I do not know.

I haven’t ventured into such experiments so far.

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post #966 of 1038 Old 01-17-2020, 09:33 AM
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I don't think it's going to do much for them if they're not being used for TR and might reduce their output since it's now having to move more mass than designed.
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post #967 of 1038 Old 01-18-2020, 02:37 AM - Thread Starter
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I don't think it's going to do much for them if they're not being used for TR and might reduce their output since it's now having to move more mass than designed.
Agreed. Besides, in a SLAPS setup, much better to just load up the SLAPS. That is what they are for

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post #968 of 1038 Old 01-24-2020, 04:10 AM - Thread Starter
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Just got in a shipment of JBL’s today, all 120lbs of it



And i got 4 more earlier, so that equal 15 units



Yes, i know 15 is a odd number. I ordered 16, and through a lot of fumbling and wrong inventory this is what i got. Frustrating, i know, and now they are no longer in stock at the Norwegian store and no longer on sale at the Swedish store, so......
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post #969 of 1038 Old 01-24-2020, 11:21 AM
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What’s the plan for the new drivers?
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post #970 of 1038 Old 01-24-2020, 11:48 AM - Thread Starter
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Quote:
Originally Posted by gpmbc View Post
What’s the plan for the new drivers?
You can never have too many JBL’s, man

I mainly just took advantage of the sale on BF, and i ordered enough to play a little

I have also ordered more SLAPS, as i wanted to try them as farfields, built more like a normal sub, LOL.

But also maybe test more with them as boss and innertubes around them, also known as hoverboss.

And then there is the Nano Devastator, and maybe try a proper ported version.

Lot of stuff you can do with a good sub driver

Oh, and i may also try converting my sonos to ported
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post #971 of 1038 Old 01-24-2020, 11:52 AM
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Quote:
Originally Posted by Nalleh View Post
You can never have too many JBL’s, man

I mainly just took advantage of the sale on BF, and i ordered enough to play a little

I have also ordered more SLAPS, as i wanted to try them as farfields, built more like a normal sub, LOL.

But also maybe test more with them as boss and innertubes around them, also known as hoverboss.

And then there is the Nano Devastator, and maybe try a proper ported version.

Lot of stuff you can do with a good sub driver

Oh, and i may also try converting my sonos to ported
I thought you had decided to go all in and was converting your house's foundation to a BOSS.
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post #972 of 1038 Old 01-24-2020, 01:01 PM - Thread Starter
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I thought you had decided to go all in and was converting your house's foundation to a BOSS.
Yeah, a HoverHouse !
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post #973 of 1038 Old 01-25-2020, 09:02 AM
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^^^^ Hmmm.. So when's the structural engineer showing up? Let's not tempt???
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post #974 of 1038 Old 01-25-2020, 06:22 PM
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Looks like Groundhog's Day ($29 JBL 12 thread)!

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post #975 of 1038 Old 01-27-2020, 01:12 PM - Thread Starter
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Ok, got another test done today. So last time i got too big(fat) tubes to use as iso’s, so the other day i got the more correct 16" X 1.75", and then i could put them under the whole TR Sleds, front and rear. So full air ride

There is some tweaking to do with finding the best air pressure, and i still don’t have proper pressure gauge, LOL. So a bit by feel so far.

But here is a Viberry of a scene i have done before, from The Martian, and the launch late in the movie. Same settings as before on the rig. White curve is old Hudson iso setup, and yellow curve is from today. New record: ~143dB/1.5G ish(red circle) compared to the old ~136dB/0.6G.

Rather nice upgrade But I need to get a meter to read the air pressure, LOL.

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post #976 of 1038 Old 01-27-2020, 02:24 PM
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Impressive, so are the inner tubes used in conjunction with the ISOs or by themselves? How many inner tubes total?
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post #977 of 1038 Old 01-27-2020, 03:46 PM - Thread Starter
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Impressive, so are the inner tubes used in conjunction with the ISOs or by themselves? How many inner tubes total?
The iso’s are still there, but the tubes are pumped up past them, so they are not touching the floor. All air ride

I have 4 tubes now, one in each corner if you will. However, the boards i have the tubes under is narrower than 16", so i simply used duct tape to shape the tubes into more of a figure 8.
Here is a pic where you can see the tubes protruding in front of the sleds, and you can barely see the duct tape in the middle of each tube too.

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post #978 of 1038 Old 01-27-2020, 06:17 PM
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Impressive, so are the inner tubes used in conjunction with the ISOs or by themselves? How many inner tubes total?
If you're looking to do it keep the isos in place like Nalleh did for safety. They're your fallback if the tube gets punctured or bursts.
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post #979 of 1038 Old 01-29-2020, 08:27 PM - Thread Starter
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Next week’s project.

Now that i got a new load of JBL’s i can test hoverboss. So i will use the boards i used to mount 4 JBL’s in this pic:



Only move them under the sleds and downfiring, and then put inner tubes around the drivers to seal against the floor. Basically converting the JBL’s to air pumps, LOL.

I’ll see if i there is room for more while i am under there
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post #980 of 1038 Old 02-03-2020, 09:13 AM - Thread Starter
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Ok, time for an overhaul

I had done this earlier, but not as thorough as this time.

So, here is the subject of the lube job today



So, it is just 4 bolts to loosen, and maybe a little tap with a plastic mallet to part the two sides, and it looks like this. It is glued together.



To get the cylinder out of the remaining half side, to NOT bend on it, instead use the same plastic/runner mallet and hit it on the corners of the housing, like in this pic, while holding it on the cylinder, just inches above the work bench.



Remove the piston from the cylinder by pushing on it from one end. The magnet is resisting this, so you need to push hard, and it will release.

Dry off any lube remaining, and relube with a white lithium grease, or as i did a lithium moly grease. Point is to make it slippery Apply grease liberally on the piston AND inside the cylinder all over the sliding surfaces.



Then it is just a matter of putting the piston back, wipe any excess grease, and assemble the rest in reverse order.



Pay attention to get the cylinder seated correctly, as glue resedue might get in the way, and check that the two housing halves is seated properly, before tightening the bolts again. Done.
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post #981 of 1038 Old 02-04-2020, 07:20 AM
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Nice tutorial and perfect timing. I recently bought one used and just from handling, i can hear the tendency for the piston to hit the housing. Didn’t you also have some rubber in place at one time to quiet in the event of bottoming?
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post #982 of 1038 Old 02-04-2020, 10:10 AM - Thread Starter
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Nice tutorial and perfect timing. I recently bought one used and just from handling, i can hear the tendency for the piston to hit the housing. Didn’t you also have some rubber in place at one time to quiet in the event of bottoming?
Correct, you can see those rubber feets in pic nr 2, if you zoom a bit. As you can see the piston already has some rubber on the ends, but that mod still helps a lot on the bottoming noise

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post #983 of 1038 Old 02-05-2020, 10:00 AM - Thread Starter
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Operation HoverBoss.

Ok, so this will not be pretty, LOL. My once pristine TR Sleds have already been converted so many time, it is full of holes, HAHA.

My poor stripped out sled :



The problem is the space needed for the tubes between all drivers, and i had my earlier cantilever boss drivers as tight as posssible, to make the sleds as small as possible.
But by using a bigger 24" tube instead of 16" tubes i could cover two driver with one tube. Still needed space between each row, but some spacer boards fixed that.

So to convert to HoverBoss i managed to repurpose all previously used wood bits, so it looks like a mess, but this way i could test it rather quick.



So i started with 6 drivers, mounted and ready for tubes.



Tubes in place and hose excentions for filling outside of sled.



Turned over and all connected. Now there is not only lots of speaker wires, but air hoses too, LOL.



Not done any testing yet, just some sine waves to check if it all works, and yup, this does feel promising,

More to come
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post #984 of 1038 Old 02-05-2020, 10:29 AM
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You should make a 2nd sled for the experiments and swap them out. The wood is cheap for it and it would make life easier.

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post #985 of 1038 Old 02-05-2020, 10:35 AM
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How often do you have to air up your JBL,s? Ever gotten a flat?
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post #986 of 1038 Old 02-05-2020, 11:58 AM - Thread Starter
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Quote:
Originally Posted by DesertDog View Post
You should make a 2nd sled for the experiments and swap them out. The wood is cheap for it and it would make life easier.
I would rather use this one as testbed, in case it need changes underway. If i am not happy, and need to go back, i just reconfigure it back. If i build a new one, and then need to change it again after testing, then the new one will have to be modified. Better to do the testing on the old geeser Unlike a lot of other guys, i don’t build it "done" at first try, so i don’t do the stain/paint etc, until i am truly done.

Quote:
Originally Posted by Phillihp23 View Post
How often do you have to air up your JBL,s? Ever gotten a flat?
Uhhm, i don’t air up the JBL’s(drivers), LOL. I air up the innertubes surrounding the JBL’s. And if you do the excention hoses right, you shouldn’t have any air leaks.

That being said, it is way to early to say what pressure to use, i need more testing. But it is easy to alter pressure with it like this, as i just grab the hose with valve on it an adjust, up or down. No need to lift the plattform.

I did however have a flat earlier, as the innertubes laid against one of the iso’s, and since both are rubber’ish, it resulted in a puncture. No worries, i had more in stock, LOL.

Dual AVR 13.1.8 SWAtmos - Atmos 13.1.8/DTS X 9.1.8/Auro 3D 13.1 - Denon AVCX8500H+AVRX7200WA - Klipsch+KEF - 6xSI18" - 12xJBL 12" w/6xSLAPS M12 downfiring VNF - 3x2 stacked Crowson MA - 4xBK-LFE Dual TR Sleds- 6xNU6K(fan&trig mod) - Minidsp 10x10HD - Oppo UDP203 - XB1X - ATV4K - Vertex2 - JVC RS600 Dreamscreen V2 120"- Philips 65OLED873.
>>>>Nalleh’s HT<<<<

Last edited by Nalleh; 02-05-2020 at 04:15 PM.
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post #987 of 1038 Old 02-05-2020, 06:26 PM
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Getting ready to tend to this. Before I forget, does that N on the bottom need to face up or down? I didn’t pay attention when I took it out. Also, the clank I heard was not from the piston but it was dry anyways and needs grease it’s from the case that holds the piston hitting the outer case. Can I put a little weather stripping or rubber where the arrow points to without interfering with operation? Diggin your new tube set up btw. What made you want BOSS drivers again underneath in addition to SLAPS? I’m sure the answer is “because I can” LOL but maybe there is something you felt was missing.
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post #988 of 1038 Old 02-06-2020, 01:22 AM - Thread Starter
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Quote:
Originally Posted by gpmbc View Post
Getting ready to tend to this. Before I forget, does that N on the bottom need to face up or down? I didn’t pay attention when I took it out. Also, the clank I heard was not from the piston but it was dry anyways and needs grease it’s from the case that holds the piston hitting the outer case. Can I put a little weather stripping or rubber where the arrow points to without interfering with operation? Diggin your new tube set up btw. What made you want BOSS drivers again underneath in addition to SLAPS? I’m sure the answer is “because I can” LOL but maybe there is something you felt was missing.
The N label faced up on all mine, so up when the BK stand on the floor on its mounts.
Thanks for the pic of the cork pads on the piston ends. I guess they had that before going to rubber pads
Yeah, if the motor is loose in the housing, you can shim it a bit, but i suspect very little is needed. You could try with some strips of tape or something similar thin, to tighen it up a bit.

Well, i have tried multiple versions of boss before, but compared to a normal boss, the SLAPS works better.

But in my head, this hoverboss kind of convert the principle from a mass shaker, to a air pump, and it just seems like a much more efficient way of making movement. Time will tell if that is the case.

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post #989 of 1038 Old 02-06-2020, 09:57 AM
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Thanks for the feedback and I’ll be following along for sure.
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post #990 of 1038 Old 02-06-2020, 10:21 AM - Thread Starter
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More work. In testing yesterday, i heard a lot of air leaks under the tubes from the drivers pumping. I don’t have carpet floors, i have hardwood.
Also if you noticed on last pics i turned the 2x4 around so it was 4" tall instead of earlier laying flat= 2". This was so the JBL’s under the seat would clear the seat frame.

This of course makes the sleds 2"+ taller. And i don’t like that, so i found a way to continue using them flat, or 2".
I rotated the JBL’s under the seat, so they clear the frame and fits up IN the frame.



And to seal the tubes better, i used speaker box carpet under the sled.



This also solved the squeeking the tubes made against the wood sled.



And tubes back on. Not as symmetric, but purely cosmetic, and doesn’t show under the sleds anyway




And i will also use the same fabric, or a carpet under the sled, to seal against the floor.

A little more testing earlier today, these tings are totally iiiinsane!! The headroom is simply off the charts, 4 hz is like riding a horse, LOL!! That test was before i made todays mods, so there was a lot of blowing noises, LOL, as air escaped everywhere under and over the tubes, but there wasn’t any signs of the JBL’s giving in.

Funny note. At first i thought it felt very gimmicky and strange. Since i now have the JBL’s in correct downfiring position, the concensous is to have them in phase, so i did. But then i tried them inverted, and VOILA, there it was, it was like night and day, LOL. Also, they produce a lot more SPL than i thought they would, being so tiny "boxes«, LOL.
m0j0, SBuger and Magly like this.

Dual AVR 13.1.8 SWAtmos - Atmos 13.1.8/DTS X 9.1.8/Auro 3D 13.1 - Denon AVCX8500H+AVRX7200WA - Klipsch+KEF - 6xSI18" - 12xJBL 12" w/6xSLAPS M12 downfiring VNF - 3x2 stacked Crowson MA - 4xBK-LFE Dual TR Sleds- 6xNU6K(fan&trig mod) - Minidsp 10x10HD - Oppo UDP203 - XB1X - ATV4K - Vertex2 - JVC RS600 Dreamscreen V2 120"- Philips 65OLED873.
>>>>Nalleh’s HT<<<<

Last edited by Nalleh; 02-06-2020 at 04:07 PM.
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