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post #61 of 122 Old 05-17-2019, 11:03 AM - Thread Starter
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BOSS Build with 3 JBL 12” drivers

Ok, so gluing/brad nailing both boards together first and then routing is way easier. Can knock out 6 holes in no time...can’t believe I didn’t do this the first time.

Hard part is done!
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post #62 of 122 Old 05-17-2019, 01:04 PM
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Looks great, good job, man
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post #63 of 122 Old 05-17-2019, 01:50 PM - Thread Starter
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BOSS Build with 3 JBL 12” drivers

Awww haha, I bought a 3/8” inch rabetting bit with 1/2” depth to counter sink the driver, because that’s all the first store I went to had and that slight difference means another trip to a different store now, was hoping they’d magically fit. Looks like this is going to bleed into tomorrow, family plans tonight. Oh well, liking how this one is turning out!

1/4” too small for the driver to sit flush!
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post #64 of 122 Old 05-17-2019, 01:52 PM
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It may not fit yet but it sure looks nice. I cant do that with my jigsaw. Lol

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post #65 of 122 Old 05-17-2019, 05:22 PM - Thread Starter
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Originally Posted by BryceDH View Post
It may not fit yet but it sure looks nice. I cant do that with my jigsaw. Lol

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Sure it’s round, but not flush yet, lol. I should’ve cut the outer diameter larger for the flush mount first, but I was just thinking of the ease of cutting both holes at the same time and using a rabetting bit, didn’t realize the rabetting bits are all a hair too small to do what I wanted. So instead of free hand trimming around each hole which would work fine, and it’s not like anyone will ever see it, I’m getting creative with a 45 degree chamfer bit to take a little more off the inner diameter; and hopefully after all that it’ll allow me to use the 3/8” rabetting to get what I need to drop the drivers in flush. If it doesn’t, guess I’ll cut a larger circle jig to trim around the edges.

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post #66 of 122 Old 05-17-2019, 06:25 PM
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Quote:
Originally Posted by Sekosche View Post
Sure it’s round, but not flush yet, lol. I should’ve cut the outer diameter larger for the flush mount first, but I was just thinking of the ease of cutting both holes at the same time and using a rabetting bit, didn’t realize the rabetting bits are all a hair too small to do what I wanted. So instead of free hand trimming around each hole which would work fine, and it’s not like anyone will ever see it, I’m getting creative with a 45 degree chamfer bit to take a little more off the inner diameter; and hopefully after all that it’ll allow me to use the 3/8” rabetting to get what I need to drop the drivers in flush. If it doesn’t, guess I’ll cut a larger circle jig to trim around the edges.
I couldn't find the right size rabett the size I needed locally so just made a new hole for my circle jig (a couple holes actually; needed to make two passes) to recess these JBLs. Anyway, I feel your pain. Luckily for me, I figured it out before cutting out the first big hole. What will you attach the circle jig to?
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post #67 of 122 Old 05-17-2019, 06:54 PM - Thread Starter
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Originally Posted by jcmccorm View Post
I couldn't find the right size rabett the size I needed locally so just made a new hole for my circle jig (a couple holes actually; needed to make two passes) to recess these JBLs. Anyway, I feel your pain. Luckily for me, I figured it out before cutting out the first big hole. What will you attach the circle jig to?

Didn’t realize it would be this much of a pain to flush mount after the fact...lessons learned.

Tried my chamfer bit idea, and it sort of works but is more work than just creating a larger circle to place around the hole as a guide with a half inch bit set to a half inch depth...doesn’t really matter how it looks. I guess I’m being silly, as it’s literally hidden underneath a couch, lol.

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post #68 of 122 Old 05-17-2019, 07:55 PM
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Impressive @Sekosche ! Looking forward to your review of the BOSS Six.
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post #69 of 122 Old 05-17-2019, 09:15 PM - Thread Starter
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So the outer diameter of these driver frames are 12 and 1/4”! No wonder, I was thinking just 12” even after routing out a little more on top of the 3/8” rabetting bit they still wouldn’t fit. Would need a 5/8” cut around the inner diameter for a flush fit. Guess I’ll just stick with cutting a larger circle guide and run a 1/2” straight bit on top of the 3/8” rabetting to finish up.

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post #70 of 122 Old 05-17-2019, 10:11 PM
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HAHA, jiis man, i though you had learn by now: measure twice, cut once

ALWAYS check measurements

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post #71 of 122 Old 05-18-2019, 06:54 AM - Thread Starter
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Originally Posted by Nalleh View Post
HAHA, jiis man, i though you had learn by now: measure twice, cut once



ALWAYS check measurements

Haha, instructions and spec sheets? What are those for when I have experience, lol?

I blame the rabetting bit plan not working like I hoped to flush mount, lol, otherwise it’s a minor setback that‘s added time. I saw a lot of 1/2” rabett bits but totally spaced on the driver outer diameter being 12.25”, needing essentially a 5/8” extra cut to fit flush with the 11” holes. Also, most of the 1/2” rabetting bits are in respect to depth and not the radius of the cut, so I was off either way.

Building a new jig and getting back to work on it shortly.

How’s your 18” TR ejector seat coming along?

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post #72 of 122 Old 05-18-2019, 07:51 AM
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It's not that hard to do after the fact. Hot glue a strip of wood across the hole and then glue a spacer that's the thickness of the boards in the center of the hole on the strip. Find the center of your hole, mark it on the block sitting in the approximate center, drill a hole for the pin of the router circle jig, and you can use your normal plunge router base on the circle jig to make the recess (like you would have done in the first place). When done, knock the hot glued strip off. I've found that hot glue is surprisingly strong between two pieces of wood, so don't use too much.
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post #73 of 122 Old 05-18-2019, 09:48 AM - Thread Starter
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BOSS Build with 3 JBL 12” drivers

I was going to make a circle jig or just use my previous Milescraft guide, but in the end I chose to just free hand it. I only need a 1/4” taken off all around after the 3/8” rabetting, so instead of all that work per hole free hand won out. Sure, it’s not perfect, but the recess doesn’t matter to me. Wasted too much time on worrying about it already; I’ll be able to sleep at night with this being the only thing I didn’t finish correctly.

Good enough, just traced a 1/2” around each after the 3/8” rabetting and free hand routed, much faster, should have just done this yesterday! One of these days I’ll get a project right from start to finish as intended.
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Processing: Denon X4200, NU6KDSP, 3KDSP
Video: Epson 3700; Screen: Silver Ticket 106" High Contrast

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post #74 of 122 Old 05-20-2019, 05:17 AM
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Looks like a fun build.

Question for the experts. Why go with a quantity of 3 subs? I though the rule of thumb was to use multiple of 2 in order to keep the ohms at 2/4/8? Are two sheets of plywood necessary for couch support or would one sheet of plywood be sufficient for the average couch?
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post #75 of 122 Old 05-20-2019, 05:39 AM
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How silent are the subs in this configuration? I realize that completely open air, you get equal wave cancellation but this is a little different. You have some of the subs under a mostly enclosed couch and that couch can easily act as the speaker box. And while it may not be a great speaker box, it's probably enough to at least let the BOSS create some sound.

Even when I mounted my earthquake MQB-1's in my couch I was able to hear some resonation from them. I had to move them externally and the sound was gone.

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post #76 of 122 Old 05-20-2019, 06:08 AM - Thread Starter
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BOSS Build with 3 JBL 12” drivers

Quote:
Originally Posted by lmidgitd View Post
Looks like a fun build.



Question for the experts. Why go with a quantity of 3 subs? I though the rule of thumb was to use multiple of 2 in order to keep the ohms at 2/4/8? Are two sheets of plywood necessary for couch support or would one sheet of plywood be sufficient for the average couch?

I just did 3 to fit easily where I have little spaces in my couch frame, and now I’m adding 3 more behind the couch. It is probably easier to do multiples of 2, but the amplifier won’t know the difference as long as it has enough power and is stable to drive the end load.

One sheet of plywood might be enough, but I’m not really sure there how much flexing would depend on all the other design variables. I’ve only built the BOSS with two sheets, but one 3/4” sheet is still pretty darn stiff in my mini riser that’s bolted to the couch frame so you might be OK.

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How silent are the subs in this configuration? I realize that completely open air, you get equal wave cancellation but this is a little different. You have some of the subs under a mostly enclosed couch and that couch can easily act as the speaker box. And while it may not be a great speaker box, it's probably enough to at least let the BOSS create some sound.



Even when I mounted my earthquake MQB-1's in my couch I was able to hear some resonation from them. I had to move them externally and the sound was gone.

My design is actually totally open with big gaps all around and above the drivers so I get no added SPL or awkward noises from this configuration even with minimal ground clearance; the BOSS 2.0 will move the drivers ups further 1/2” off the ground too.

I did notice with my ear to the floor in the front where I have a shag carpet, there’s a faint noise of chuffing/air blowing under heavy use on the rug. Otherwise, they’re totally silent how I have them set up. I’m not sure if the resonating you heard from the MB Quart was mechanical driver noise or your furniture vibrating or added SPL, but the JBL’s are silent to me in this application.
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post #77 of 122 Old 05-20-2019, 06:13 AM
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Originally Posted by Sekosche View Post
My design is actually totally open with big gaps all around and above the drivers so I get no added SPL or awkward noises from this configuration even with minimal ground clearance; the BOSS 2.0 will move the drivers ups further 1/2” off the ground too.

I did notice with my ear to the floor in the front where I have a shag carpet, there’s a faint noise of chuffing/air blowing under heavy use on the rug. Otherwise, they’re totally silent how I have them set up. I’m not sure if the resonating you heard from the MB Quart was mechanical driver noise or your furniture vibrating or added SPL, but the JBL’s are silent to me in this application.
The MQB-1's are transducers not subs so they should be silent. But even those moving around a tiny bit in the empty couch cavity caused some audible sensation if you paid attention and at lower volume.

I really like the BOSS idea.
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post #78 of 122 Old 05-20-2019, 07:02 AM - Thread Starter
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Quote:
Originally Posted by markmon1 View Post
The MQB-1's are transducers not subs so they should be silent. But even those moving around a tiny bit in the empty couch cavity caused some audible sensation if you paid attention and at lower volume.



I really like the BOSS idea.

Ah sorry, had the BOSS drivers on the brain and they’re named similar . I could also hear buttkickers vibrate some during quiet scenes when I tried them, so I’m guessing that’s just the nature of those shaker’s engineering. If you’re interested in a BOSS build, definitely try it out. You can also combine the two for truly ridiculous amounts of TR like a few people currently are.

Speakers: PSA MTM-210T x2, MTM-210C, MT-110SR x2; Atmos-SVS Satellite x2, DIY Volt-10 x2
Subs: PSA V1801 x2, DIY: 18" RSS460HO, 15" RSS390HO x2, BOSS w/JBL CX1200 x6
MA’s: Crowson Tech x2
Processing: Denon X4200, NU6KDSP, 3KDSP
Video: Epson 3700; Screen: Silver Ticket 106" High Contrast
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post #79 of 122 Old 05-20-2019, 02:44 PM
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Quote:
Originally Posted by Sekosche View Post
Ah sorry, had the BOSS drivers on the brain and they’re named similar . I could also hear buttkickers vibrate some during quiet scenes when I tried them, so I’m guessing that’s just the nature of those shaker’s engineering. If you’re interested in a BOSS build, definitely try it out. You can also combine the two for truly ridiculous amounts of TR like a few people currently are.
Ya buttkickers are very noisy. The mqb1s are silent. It was the couch cavity causing the noise. As I said, moving them out of inside the couch solved it 100%.

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post #80 of 122 Old 05-22-2019, 07:45 AM - Thread Starter
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BOSS Build with 3 JBL 12” drivers

Finishing up BOSS 2.0 this afternoon. Nearly done! Have to run errands a while but hopefully will finish up by tonight. I’ve got Hellboy II and Godzilla (1998) with BEQ ready to break them in tomorrow.

Flush mount cuts

45 degree bevel on the edges instead of a roundover just to change it up, can’t really tell from the pic

A little darker stain than BOSS 1.0

Speakers: PSA MTM-210T x2, MTM-210C, MT-110SR x2; Atmos-SVS Satellite x2, DIY Volt-10 x2
Subs: PSA V1801 x2, DIY: 18" RSS460HO, 15" RSS390HO x2, BOSS w/JBL CX1200 x6
MA’s: Crowson Tech x2
Processing: Denon X4200, NU6KDSP, 3KDSP
Video: Epson 3700; Screen: Silver Ticket 106" High Contrast

Last edited by Sekosche; 05-22-2019 at 07:49 AM.
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post #81 of 122 Old 05-22-2019, 09:27 AM
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Looks like that platform will remove fillings!! Pretty cool build for something going under a couch lol. Gotta say, I'm a bit envious of how this is going, great stuff!!

Not sure if it was nature of the build or not, but I noticed a router gouge for the beveled edge. Something I've had to do to prevent that is managing the piece being worked on. It looks like the bevel was added with the BOSS on the ground. Setting it up on trashcans or sawhorses makes a world of difference. If it shifts around too much while moving the router along the edge, add weight to the platform.

Being more aware of this has helped improve my hand-held router results to beyond my actual woodworking skill level haha!
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post #82 of 122 Old 05-22-2019, 09:56 AM - Thread Starter
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Looks like that platform will remove fillings!! Pretty cool build for something going under a couch lol. Gotta say, I'm a bit envious of how this is going, great stuff!!



Not sure if it was nature of the build or not, but I noticed a router gouge for the beveled edge.

Thanks, it’s a fun little project that’s for sure! I figure most people have couches with multiple sub drivers built into them...right?

Any imperfections were due to the plywood voids in a couple spots that the router bit guide ran deeper into, no worries. After quickly free handing the flush mount, I can live with some minor imperfections. This new platform will be almost totally hidden under the seating, not really sure why I always router the edges of nearly everything I do, but it pleases me.

My wife asked me last night why I didn’t just modify the last platform instead of the new build, and I told her well then I wouldn’t have been able to fit the other 3 drivers of course, lol. She just shook her head.

Stuck for an hour getting my tires rotated and car maintenance done, and all I can think of is finishing up the BOSS BOSS BOSS...
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post #83 of 122 Old 05-22-2019, 10:30 AM
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Originally Posted by Sekosche View Post
Finishing up BOSS 2.0 this afternoon. Nearly done! Have to run errands a while but hopefully will finish up by tonight. I’ve got Hellboy II and Godzilla (1998) with BEQ ready to break them in tomorrow.
Looks awesome Sekosche! Can't wait to hear your impressions of BOSS 2.0!

You're in for a treat with Godzilla (1998) with the BOSS and BEQ. We watched it a couple nights ago with that combo....nice use of layered ULF throughout the entire movie. So much better than 20 years ago when my wife and I first watched it on DVD back in the day after first finishing our theater! What a difference 20 years of technology advances has made in our hobby!

The movie is better than I remembered also....lots of campy humor that seemed just right for the story line. Makes me want to revisit some of those 90's action films all over again....Face/Off, Con Air, The Rock, The Heat, T2, Broken Arrow, Mission Impossible I, Bad Boys I....

But, the bass in Godzilla, OMG....you're in for a treat.

Hellboy 2 is a great suggestion....haven't tried that with BOSS/BEQ yet. I remember it being a bass-feast even without those tools when we first watched it. Should be a nice surprise this time around!

Sounds like you have a great afternoon and evening coming up......Enjoy!
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post #84 of 122 Old 05-22-2019, 11:37 AM - Thread Starter
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BOSS Build with 3 JBL 12” drivers

Hardest part of disassembling BOSS 1.0 is removing the Hudson isos! These little suckers are on there good. Going to use rubber cement to reapply them, but no worries about these accidentally coming off should you move your furniture around a lot.

They all came off in one piece. You can tell where the pressure points are as the front half were a bit more adhered to the plywood than the rear, which makes sense for mine.

Speakers: PSA MTM-210T x2, MTM-210C, MT-110SR x2; Atmos-SVS Satellite x2, DIY Volt-10 x2
Subs: PSA V1801 x2, DIY: 18" RSS460HO, 15" RSS390HO x2, BOSS w/JBL CX1200 x6
MA’s: Crowson Tech x2
Processing: Denon X4200, NU6KDSP, 3KDSP
Video: Epson 3700; Screen: Silver Ticket 106" High Contrast

Last edited by Sekosche; 05-22-2019 at 11:49 AM.
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post #85 of 122 Old 05-22-2019, 12:14 PM - Thread Starter
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About as flush as you can get!

Speakers: PSA MTM-210T x2, MTM-210C, MT-110SR x2; Atmos-SVS Satellite x2, DIY Volt-10 x2
Subs: PSA V1801 x2, DIY: 18" RSS460HO, 15" RSS390HO x2, BOSS w/JBL CX1200 x6
MA’s: Crowson Tech x2
Processing: Denon X4200, NU6KDSP, 3KDSP
Video: Epson 3700; Screen: Silver Ticket 106" High Contrast
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post #86 of 122 Old 05-22-2019, 01:27 PM
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WooHoo @Sekosche. Shake Rattle, and Roll!
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post #87 of 122 Old 05-22-2019, 01:48 PM - Thread Starter
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BOSS Build with 3 JBL 12” drivers

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Originally Posted by lizrussspike View Post
WooHoo @Sekosche. Shake Rattle, and Roll!

Almost there! Going to drop the drivers in after bringing the platform inside, learned that with BOSS 1.0, because it was a little awkward and off balance to move on a furniture dolly.

Don’t think I’ll even get them wired up until later tonight after the kid’s sports or first thing tomorrow morning. After sitting on the “normal couch”, I actually like the height the BOSS adds on top of my mini riser for the MA’s because we’re a tall bunch of people.


Soon my pretties!
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Speakers: PSA MTM-210T x2, MTM-210C, MT-110SR x2; Atmos-SVS Satellite x2, DIY Volt-10 x2
Subs: PSA V1801 x2, DIY: 18" RSS460HO, 15" RSS390HO x2, BOSS w/JBL CX1200 x6
MA’s: Crowson Tech x2
Processing: Denon X4200, NU6KDSP, 3KDSP
Video: Epson 3700; Screen: Silver Ticket 106" High Contrast

Last edited by Sekosche; 05-22-2019 at 02:18 PM.
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post #88 of 122 Old 05-22-2019, 01:52 PM
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Looks great Will be fun to hear your impressions
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Dual Atmos Receivers - Atmos 13.1.8/DTS X 9.1.8/Auro 3D 13.1 - Denon AVCX8500H+AVRX7200WA - Klipsch+KEF - 6xSI18" - 8xJBL 12" BOSS - 4xJBL 12" w/SLAPS M12" VNF - 3x2 stacked Crowson MA - 4xBK-LFE - 6xNU6K(fan&trig mod) - Minidsp 10x10HD - Oppo UDP203 - XBox OneX - Apple TV4K - JVC RS600 Dreamscreen V2 120"- Philips 65OLED873.
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post #89 of 122 Old 05-22-2019, 03:23 PM
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Quote:
Originally Posted by Sekosche View Post
Almost there! Going to drop the drivers in after bringing the platform inside, learned that with BOSS 1.0, because it was a little awkward and off balance to move on a furniture dolly.

Don’t think I’ll even get them wired up until later tonight after the kid’s sports or first thing tomorrow morning. After sitting on the “normal couch”, I actually like the height the BOSS adds on top of my mini riser for the MA’s because we’re a tall bunch of people.
Getting closer! Bet you're excited Sekosche. I hear you about the kids sports....getting ready to go watch my daughter, who will be a freshman in HS next year, try out for the high school softball team. Directly after that is my son's varsity spring football game...busy night!

One question....what are those 2 isolators in the middle of your platform above. They look different which is why I'm asking. I've found mixing isolators (different impedances under the BOSS platform) has adverse effects on the BOSS performance. The platform response will be largely effected by the highest impedance isolator underneath. If those isolators are harder than the Hudson's they might be taking away some TR from the BOSS.

Just wanted to mention that if those are indeed isolators and part of the platform design.
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post #90 of 122 Old 05-22-2019, 04:20 PM - Thread Starter
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BOSS Build with 3 JBL 12” drivers

Quote:
Originally Posted by trhought View Post
Getting closer! Bet you're excited Sekosche. I hear you about the kids sports....getting ready to go watch my daughter, who will be a freshman in HS next year, try out for the high school softball team. Directly after that is my son's varsity spring football game...busy night!



One question....what are those 2 isolators in the middle of your platform above. They look different which is why I'm asking. I've found mixing isolators (different impedances under the BOSS platform) has adverse effects on the BOSS performance. The platform response will be largely effected by the highest impedance isolator underneath. If those isolators are harder than the Hudson's they might be taking away some TR from the BOSS.



Just wanted to mention that if those are indeed isolators and part of the platform design.

Luckily, I’ve only got one in multiple sports now and thank goodness soccer is over; the other one just started walking.

The two isos in the middle are a pair of first gen Crowsons I had extra, they’re a tad shorter than Hudsons but are very squishy. The ones in the middle don’t get much pressure, so they’re more for piece of mind, but they do bear a little weight. I ran out of isos after ordering I forget how many, I think 22 total for both platforms of the 2.5” and I bought some of the tiny 0.5” ones for around the house. If the slightly heavier BOSS 2.0 feels less jiggly, I might order another 4 pack, but I doubt it’ll be necessary with 14 on the bottom and 8 on the top layer.
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Speakers: PSA MTM-210T x2, MTM-210C, MT-110SR x2; Atmos-SVS Satellite x2, DIY Volt-10 x2
Subs: PSA V1801 x2, DIY: 18" RSS460HO, 15" RSS390HO x2, BOSS w/JBL CX1200 x6
MA’s: Crowson Tech x2
Processing: Denon X4200, NU6KDSP, 3KDSP
Video: Epson 3700; Screen: Silver Ticket 106" High Contrast

Last edited by Sekosche; 05-22-2019 at 07:48 PM.
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