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-   -   Operation shake the couch: BOSS Build (https://www.avsforum.com/forum/155-diy-speakers-subs/3066850-operation-shake-couch-boss-build.html)

BryceDH 05-10-2019 05:54 AM

Shake the couch: BOSS Build
 
I haven't done a build thread before, but thought this would be a good time to try one out. This build is thanks to all the info/work that has been done on "The hideaway theater" thread.

I'm putting together a mini-riser for my seat in the "home theater room". For me, the theater is our living room. Although it is a dual purpose room, I've got a lot of freedom to do as I wish because I have an awesome wife.

I'm still waiting on two JBL drivers to show up, but have bought the plywood and everything else (I think) up to this point. I've got an open channel on my inuke 6000dsp that will drive the subs.

The plan is to use a dual layer 3/4" per sheet platform with the drivers being recessed. My seat is just the right size that I can get the double platform out of 1 sheet of plywood.https://uploads.tapatalk-cdn.com/201...ed6c5fabd4.jpghttps://uploads.tapatalk-cdn.com/201...cfd8284863.jpg

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BryceDH 05-10-2019 06:08 AM

After getting the top platform cut to size, I worked on staining it to match some other bookshelfs in the room. I used pre-stain for prep and a red oak stain for the finish.

After letting the stain dry, it was time to flip my chair over and figure out where the 2 drivers could go on the platform and still fit underneath the chair. In order to make more room under the chair, I had to pull a section of the black liner off. I tried to get the drivers as close to where the chair legs are at while leaving at least some clearance.

Since it was late and not a good time to start cuts in the platform, I took the opportunity to set up the mini dsp with aron7awol's LS filter. I added the limiter settings on the inuke to allow 90 watts per driver as well as some dynamic eq to give a boost to the BOSS at lower volumes.https://uploads.tapatalk-cdn.com/201...3bd65d1ecd.jpghttps://uploads.tapatalk-cdn.com/201...22cf77d6b9.jpghttps://uploads.tapatalk-cdn.com/201...ff41fd9389.jpghttps://uploads.tapatalk-cdn.com/201...e1f942ef25.jpghttps://uploads.tapatalk-cdn.com/201...df5007f548.jpghttps://uploads.tapatalk-cdn.com/201...649cda98e7.jpg

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BryceDH 05-10-2019 06:20 AM

I spent yesterday marking up the second layer of plywood and cutting the holes for the drivers... after more reading on the BOSS thread and the VibSensor thread, I noticed a lot of people are beefing up the amount of drivers on their platforms. Thinking ahead, I figured I might as well make the cuts for 2 additional drivers "Just in case".

That brings us to today. At this point I am stuck waiting for my 2 drivers to show up to verify the holes are the correct size. I did try to cut out a little undersized just to make sure I get a tight enough fit.

I'm planning on waiting to add 2 more drivers until the price comes back down at Best Buy or just not add them if the 2 drivers turns out to be more than enough (possible).

I'll be spending time learning how to use VibSensor as well as trying to read the BEQ thread to take advantage of my minidsp 2x4HD. I'm sure the BOSS will be a great addition to my Marty and VBSS's. https://uploads.tapatalk-cdn.com/201...5c4470b52b.jpghttps://uploads.tapatalk-cdn.com/201...ce64300aa2.jpghttps://uploads.tapatalk-cdn.com/201...65d659e4c5.jpg

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ereed 05-10-2019 06:57 AM

Nice to see a local AVSer trying out the BOSS. I have crowsons. You are only 1.5 hours from me. Following the build!

howiee 05-10-2019 07:31 AM

Subbed!

BryceDH 05-11-2019 08:28 PM

9 Attachment(s)
Today was a good day for progress. I got impatient as far as waiting for my drivers to arrive because they were due Wednesday. As of right now Fedex hasn't updated tracking and Newegg said to let them know if I still don't have it by Monday. I went ahead and spent the $65/piece for 2 drivers from Best Buy and hope they will come down within 30 days for me to price match. I've got no self control.

After getting these drivers home, I verified they fit in all the cutouts i previously made. I screwed the secondary sheets of plywood to the first making sure to use more than enough screws... i think i went a little overboard here. I flipped the platform over and added some leg supports to keep my couch from sliding around.

At this point I was trying to determine how I would hook the drivers up to my speakon cable. I was going to make a bracket for the back of the platform, but didn't want a trip hazard if it held the cable up too high. I decided to put the "speakon bracket" in the middle of the platform that would be hidden under the couch. It isn't the prettiest, but works great. I even added a little guide for the cable to keep it where I want it. After that, I mounted the two drivers and then added the hudson hifi isolaters. I am starting with 4 isolaters, but may need to add 2 in the middle for support. Not sure yet. Also, if you look close enough, you may be able to see that the screws i used for my drivers are poking through the top of the platform. I wasn't sure what to do here, so I filed them as best I could and didn't think much else of it. I should probably replace them with shorter screws.

The only thing left was to wire the 2 drivers. I wired in series for an 8ohm load to my 6000dsp. I need to figure out where to put the gain on the inuke. Sounds like most people settle in between 1 and 3 o'clock. I fired up the system for a really quick and quiet test run and I'm thinking this is going to be pretty awesome. I'm planning on doing some more listening/tinkering tomorrow to get a better feel. My wife wasn't in the mood for me to crank the music (or a movie), so I listened to pandora at a pretty modest volume. I could already feel the kick drum and the bass guitar which is sweet. I believe I chose a 40hz LPF for now and will lower that if it is obnoxious like some people say. I want to feel it first before I cut off those frequencies!

The build was honestly pretty easy and a ton of fun! I went ahead and downloaded all the BEQ files to start taking advantage of corrections for movies and also get more content for the BOSS to utilize. I'm also doing some reading on the VibSensor thread and will do some measurements for that as well to see where I am at.

Nalleh 05-11-2019 08:47 PM

Awsome build :)

BryceDH 05-17-2019 09:10 AM

I've watched a couple movies and listened to some music, so figured I'd share my first impressions. It is hard to describe how extremely tactile the BOSS actually is without experiencing it first hand. I actually increased the LPF up to 65hz just to see how it feels. I'm sure I'll adjust it lower as most people seem to be doing after the novelty wears off.

Several people have helped me figure out the VibSensor measurements and it looks like my setup is actually working very well. I maxed the gain on the inuke to see what the graph would look like if I rode the limiter. I believe I've got the peak limiter set for 115w per driver right now since I've read that equates to 80w rms. 2 more drivers are supposed to arrive on Wednesday so in curious how much more ridiculous that will make it.

The build was definitely a ton of fun and would be a very easy intro into DIY for anybody that would want more tactile feedback from their commercial subs.

With the VBSS's being nearfield behind me, the BOSS feels really natural and "tricks" me into thinking I'm just feeling my VBSS's. https://uploads.tapatalk-cdn.com/201...515cfbe94a.jpg

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ereed 05-17-2019 09:42 AM

Quote:

Originally Posted by BryceDH (Post 58060764)
With the VBSS's being nearfield behind me, the BOSS feels really natural and "tricks" me into thinking I'm just feeling my VBSS's.
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That's how its supposed to be. Looks like you got it dialed in pretty well!

Rowan611 05-17-2019 09:50 AM

Quote:

Originally Posted by BryceDH (Post 58060764)
I've watched a couple movies and listened to some music, so figured I'd share my first impressions. It is hard to describe how extremely tactile the BOSS actually is without experiencing it first hand. I actually increased the LPF up to 65hz just to see how it feels. I'm sure I'll adjust it lower as most people seem to be doing after the novelty wears off.

Several people have helped me figure out the VibSensor measurements and it looks like my setup is actually working very well. I maxed the gain on the inuke to see what the graph would look like if I rode the limiter. I believe I've got the peak limiter set for 115w per driver right now since I've read that equates to 80w rms. 2 more drivers are supposed to arrive on Wednesday so in curious how much more ridiculous that will make it.

The build was definitely a ton of fun and would be a very easy intro into DIY for anybody that would want more tactile feedback from their commercial subs.

With the VBSS's being nearfield behind me, the BOSS feels really natural and "tricks" me into thinking I'm just feeling my VBSS's. https://uploads.tapatalk-cdn.com/201...515cfbe94a.jpg

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That’s with just 2 drivers? I need to measure mine with one driver then with all three when I get my platforms connected.


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BryceDH 05-17-2019 10:16 AM

Quote:

Originally Posted by Rowan611 (Post 58060928)
That’s with just 2 drivers? I need to measure mine with one driver then with all three when I get my platforms connected.

Yeah, 2 drivers. My platform is just for 1 seat though, so I think that is why it is working well for me. My seat also has a bunch of room underneath so i put the two subs as close the rear legs as possible to make sure the vibration transfers as best as possible.

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lmidgitd 05-20-2019 05:11 AM

Nice build!

You mentioned a 10hz filter for the iNuke dsp earlier. I thought the lowest allowable filter for the dsp was 20hz? Do you think one channel of an iNuke1000 would power 4 of the JBL's sufficiently?

BryceDH 05-20-2019 05:40 AM

Quote:

Originally Posted by lmidgitd (Post 58072582)
Nice build!



You mentioned a 10hz filter for the iNuke dsp earlier. I thought the lowest allowable filter for the dsp was 20hz? Do you think one channel of an iNuke1000 would power 4 of the JBL's sufficiently?

I applied the 10hz LS filter with my minidsp 2x4HD. There are work arounds to get lower filters set on the inuke though. Not sure what the method is.

I'm not sure what the actual power handling is of the inuke 1000. The specs say 1 channel into 4 ohms will do 300watts, but I know the wattage claims for the 3000dsp and 6000dsp are overstated. I'm assuming the same is true for the 1000.

If you run an inuke1000 bridged it should be more than enough for 4 drivers. I set the limiter at 115watts per driver (been told this comes out to 80w rms) which would be 460watts total. If you already are using one of the 2 inuke channels, you'd probably be fine running the 4JBLs off of 1 of the channels. You dont have to give them a whole lot of power for it to give you some pretty awesome TR. Hopefully somebody is using a inuke1000 and can tell you how it's doing for them.

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lmidgitd 05-20-2019 05:45 AM

I'm thinking the same. Lets say the actual rms of the iNuke is half of their stated power rating, so 230watts. 4 x 80watts = 240watts. 230~240? Close enough for me not to have to worry about setting a power limiter on the iNuke.

The vibsensor graph is enticing. You may have convinced me!

BryceDH 05-20-2019 07:30 AM

Quote:

Originally Posted by lmidgitd (Post 58072674)
I'm thinking the same. Lets say the actual rms of the iNuke is half of their stated power rating, so 230watts. 4 x 80watts = 240watts. 230~240? Close enough for me not to have to worry about setting a power limiter on the iNuke.



The vibsensor graph is enticing. You may have convinced me!

I may have added some confusion. The rms rating for 1 inuke channel is 300watts at a 4 ohm load.

4 drivers x 80watts = 320 watts, not 240 unfortunately.

If the inuke got 100% of the 300watts into 4 ohms it states, you be giving 75 watts per driver worth of power. Not sure what that figure will actually be, especially for rms. I still think you'll be happy with 4 drivers getting whatever the inuke can give it on one of its channels. Itd just be that much better if you could give the drivers a little more.

Do you only have 1 open channel on an inuke 1000 to use? If you are planning on buying an inuke1000 specifically for the BOSS, I'd run it bridged. Then you'd DEFINITELY be happy feeding 4 drivers up to the recommended power.

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lmidgitd 05-20-2019 07:40 AM

I have a few options for powering a possible BOSS build. I might have an open channel of an inuke 6k, inuke 1k, or a buttkicker amp. I appreciate your responses as they have cleared up some questions. Enjoy your system!

BryceDH 05-20-2019 07:46 AM

Quote:

Originally Posted by lmidgitd (Post 58073102)
I have a few options for powering a possible BOSS build. I might have an open channel of an inuke 6k, inuke 1k, or a buttkicker amp. I appreciate your responses as they have cleared up some questions. Enjoy your system!

Good deal!

If... no, WHEN you get your BOSS built I'd love to hear your impressions. Good luck with the build and if you have any more questions feel free to ask!

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jevchance 05-20-2019 11:33 AM

Sorry noob question, is BOSS an acronym?

BryceDH 05-20-2019 11:55 AM

Quote:

Originally Posted by jevchance (Post 58074294)
Sorry noob question, is BOSS an acronym?

More or less. Check out this thread for a ton more info if you want to do some reading.

https://r.tapatalk.com/shareLink?url...3&share_type=t

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jevchance 05-20-2019 11:59 AM

Thanks, appreciated.

BryceDH 05-21-2019 03:56 PM

My "extra" two drivers showed up today and I got them all hooked up. I haven't done any listening yet, but did go ahead and the measure the EOT scene with vibsensor. Looks like my 10hz got a lot better...I'm going to assume you can tell which graph is for the BOSS with 2 subs and which one is for the 4.

With the extra 2 drivers bringing the amp load down to 4 ohms, I actually left the peak limiter at the same spot. Looking forward to watching all kinds of stuff with my setup!https://uploads.tapatalk-cdn.com/201...753935a643.jpghttps://uploads.tapatalk-cdn.com/201...45bd0da45f.jpghttps://uploads.tapatalk-cdn.com/201...601a0ab59e.jpghttps://uploads.tapatalk-cdn.com/201...3018e3b250.jpg

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lmidgitd 05-21-2019 04:46 PM

Do you have them all on one end because that's your seating position?

BryceDH 05-21-2019 05:00 PM

Quote:

Originally Posted by lmidgitd (Post 58081112)
Do you have them all on one end because that's your seating position?

Yes. It's a long single seater and I put the drivers as close to the back legs as possible because that is where most of the weight is at that I want to shake. https://uploads.tapatalk-cdn.com/201...fb5f7b7732.jpg

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lmidgitd 05-21-2019 05:42 PM

Gotcha. Good call!


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