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Repooc's Dedicated Home Theater Build

  • Last Updated:
  • Sep 19th, 2019 7:37 am
Sr. Member
Mar 15, 2005
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everything I've read/heard says your best use of multiple subs is to put them in each of the corners of the room. Do you have space in the back corners for anything? would a sonotube sub fit ? if not, what ever happened to your infinite baffle sub plans? :)
[OP]
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discoblues wrote:
Feb 7th, 2019 9:35 pm
everything I've read/heard says your best use of multiple subs is to put them in each of the corners of the room. Do you have space in the back corners for anything? would a sonotube sub fit ? if not, what ever happened to your infinite baffle sub plans? :)
In an ideal world, of course. Corners of room, mid-way the length of the room and even in the middle of the room on the ceiling.

But im very limited with space around my seating.

IB is like black magic and thats something i'll explore many years down the road when (if) I ever get bored of this setup.
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Repooc wrote:
Aug 21st, 2018 4:14 pm
That Simpsons clip made me LOL, don't think I've seen it before!! Yeah, we got the system going pretty good, eh? Room pressurization is definitely key.

We were only hovering at around -30 to -25 on the receiver/amplifier and the discrete amp for the 18" subs is only turned up to 50%... still lots of headroom to go. I just picked up an SPL meter from Amazon. Would be interested to see some measured results once I calibrate everything.
Can you post some measurements running some sine waves, say 1k of course, and maybe 50hz, 200hz, 500hz at your “typical” and/or can’t-hear-it-upstairs levels? Those subs look incredibly imposing! I’m curious to know how loud it can be, specially at low frequencies, before you start getting the “turn it down” texts Face With Tears Of Joy
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Jul 14, 2012
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Hamilton
Repooc wrote:
Feb 8th, 2019 12:17 am
In an ideal world, of course. Corners of room, mid-way the length of the room and even in the middle of the room on the ceiling.

But im very limited with space around my seating.

IB is like black magic and thats something i'll explore many years down the road when (if) I ever get bored of this setup.
You seem very satisfied with the DIY speakers from a volume perspective, but how are they for clarity? Do them seem to perform equally well with music/dialog as well as background/sound effects (shoot outs/explosions/car chases/etc). Do they compare closer to an entry level JBL (little more boomy, lacking a little on the high end) or are they fairly clear on the high end? Do they work as a center channel or do you wish you went with something else? Can you listen for long periods of time or do they wear/fatigue the ear. Did you notice the need for any sort of "break in" period or were they good to go right out of the box?

Sorry for all the questions. I guess I'm looking for a review other then they're loud as F***.

Android412
"...I started playing porn REALLY loud with speakers facing my back yard. The kids stopped going out back after the parents heard that."
[OP]
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2kfire wrote:
Feb 8th, 2019 9:04 am
Can you post some measurements running some sine waves, say 1k of course, and maybe 50hz, 200hz, 500hz at your “typical” and/or can’t-hear-it-upstairs levels? Those subs look incredibly imposing! I’m curious to know how loud it can be, specially at low frequencies, before you start getting the “turn it down” texts Face With Tears Of Joy
For sure... Will be happy to post the results after I run my room calibration software. Right now i just have the crossovers and gains tuned to my personal taste. But im very interested to see what results are after a multi-point calibration with a microphone produces.

In terms of "loudness" i can probably run a quick test this weekend with my SPL meter... But i can tell you right now anything beyond -20 is uncomfortable. There's just way too much output. And I rather like being able to enjoy and hear the subtle sounds of a movie with clarity just as much as the big explosions.

I think the movie "A Quiet Place" accomplishes this absolutely perfectly. In my dedicated theatre with a very low noise floor, you get so engrossed by the movie and the various quiet noises coming from the channels all around you.
[OP]
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Android412 wrote:
Feb 8th, 2019 9:24 am
You seem very satisfied with the DIY speakers from a volume perspective, but how are they for clarity? Do them seem to perform equally well with music/dialog as well as background/sound effects (shoot outs/explosions/car chases/etc). Do they compare closer to an entry level JBL (little more boomy, lacking a little on the high end) or are they fairly clear on the high end? Do they work as a center channel or do you wish you went with something else? Can you listen for long periods of time or do they wear/fatigue the ear. Did you notice the need for any sort of "break in" period or were they good to go right out of the box?

Sorry for all the questions. I guess I'm looking for a review other then they're loud as F***.

Android412
Happy to answer questions... No prob

Am I happy with the DIY speakers? Abso-freakin-lutely. So much so, I plan on eventually swapping out my Fluance side and rear surrounfs with a DIY solution. The Fluance speakers were merely a carry over from my last system. I really enjoy the bipoles for my 2 rows of seating but the monopoles i have for my rears are a bit narrow for my liking in terms of dispersion across the rear of the room. They do get the job done for now though and its just me being nit-picky.

The Volt 10 speakers (fron DIY SG) that im building for atmos speakers have a very wide dispersion and is a coaxial design. Im super excited to see how they perform. But they have a strong following over on AVS Forum and other A/V enthusiast forums around the world.

For clarity, the LCR setup with the SEOS waveguide is pretty hard to beat. Can't think of anything better, certainly not a traditional domed tweeter.

I absolutely love the fact that sound pans across the front stage with absolute consistency. Dialogue through the center and espcially through the accoustic screen sounds increadibly natural and clear. The best way I can describe it is being "bright" without having the "shrill" that pierces you ears. So yes, long listening periods are definitely possible and Ive done it.

Thats why when I say if i push it beyond -20 it honestly feels like my lungs are getting assulted from the pressurization of the subs in my sealed room. Not so much from the highs for my ears. But at a decent listening level the mild chest compressions/body vibrations are insanely fun and addictive. Especially in scenes where its unexpected, like a horror movie, and the involuntary body movement makes you literally jump out of your seat from fright.

Any speaker with mechanical movement will require some break in. But I tend to run pink noise on my speakers for quite some time long before ever calibrate or critically listen to any content.
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Repooc wrote:
Feb 8th, 2019 12:08 pm
For sure... Will be happy to post the results after I run my room calibration software. Right now i just have the crossovers and gains tuned to my personal taste. But im very interested to see what results are after a multi-point calibration with a microphone produces.

In terms of "loudness" i can probably run a quick test this weekend with my SPL meter... But i can tell you right now anything beyond -20 is uncomfortable. There's just way too much output. And I rather like being able to enjoy and hear the subtle sounds of a movie with clarity just as much as the big explosions.

I think the movie "A Quiet Place" accomplishes this absolutely perfectly. In my dedicated theatre with a very low noise floor, you get so engrossed by the movie and the various quiet noises coming from the channels all around you.
Awesome, looking forward to some numbers!
In my basement running white noise I can do around 75dB fairly safely without getting the texts, at 80 I’m getting texts for sure, if not a phone call! Once I build my room, if I could do ~85dB of pink noise, I’d be happy Slightly Smiling Face With all your soundproofing I’m curious to see how loud you can go before it bothers the upper floors, I’ll bet around 95dB!
[OP]
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Quick Update...

My mudroom renovation is wrapping up, so I had some extra time this past long weekend to put some focus/energy back into my HT Build... Specifically the Dolby Atmos/height channel speakers.

Finished assembling the cabinets, filled and LOTS of sanding, followed by pre-drilling the holes for my banana plug terminals and driver mounting holes.
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Then followed by 2 coats of primer applied.
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I should be able to get them painted in the evenings this week after my kids go down to bed. Will be painting them with the same matte black paint I used in my ceiling so that they effectively disappear in the ceiling cove space.

After that, I just have to mount the crossover boards, stuff the interior with polyfill and then mount the drivers. i still need to find a good french cleat system for mounting them though.
Sr. Member
Mar 15, 2005
500 posts
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Repooc wrote:
Feb 19th, 2019 12:16 pm
i still need to find a good french cleat system for mounting them though.
Check the video below for how they use a carpet transition peice for a simple french cleat system. Personally, I'm still deciding on DIY, purchase, or a combination for acoustic panels for my setup.


alternately, home depot sells similar french cleat systems that can support up to 200 lbs. - they have shorter ones but they hold less weight.
https://www.homedepot.ca/en/home/p.18-p ... 30983.html
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Progress continues....

Had a pretty productive weekend finishing up the Dolby Atmos/height channel speakers this weekend.

Took a few detailed progress pics to show you the DIY build process. Painted the cabinets with the same matte black that I used in my ceiling space. The finish looks incredible and they'll definitely dissappear once mounted.

Installed the crossover board on the side of the cabinet.
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Installed the banana plug speaker terminals and wired them up to the crossover boards. Also applied some hot glue to the back of the terminals and secure the wire to the inside of the cabinet with hot glue.
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Filled the cabinets with polyfill to add dampening.
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All drivers connected to crossover leads and then mounted into sealed cabinets.
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Here's a shot of my ad-hoc test rig... Connected directly to my AVR. The clarity and range of these speakers are phenomenal!!
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So, late last night I sleeved and terminated with banana plugs the 4 cables that have been coiled up in my ceiling. Forgot to take a pic... But they look great too!

Just waiting on the french cleats I ordered on Amazon last week and will hopefully have Dolby Atmos ready for next weekend!!!
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Repooc wrote:
Feb 25th, 2019 10:36 am
Progress continues....

All drivers connected to crossover leads and then mounted into sealed cabinets.
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20190224_095636_HDR.jpg
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Maybe it’s just me but I don’t see an HF driver?
Sr. Member
Mar 15, 2005
500 posts
244 upvotes
Atta boy!!!! Great build job man! Damn, atmos speakers the size of the 1120!
The fact they are on ceiling rather than in ceiling must really help keep the sound contained. I was going to build backer boxes for mine but couldn't be bothered.

What is the first atmos movie you watched (or plan on watching?)

When first heard about atmos, I imagined the outside effects like rain or airplanes overhead was the reason Dolby designed this immersive spec...

TBH I'm surprised I am most impressed with the visceral power of atmos when the movie sound mix takes you inside instead of outside...
... Like inside a basement bunker with the creatures crawling around upstairs in the movie a quiet place...
... Like inside the submarine hearing the pressure of the water put stress on the metal submarine as it dives deeper in the movie hunter killer...
... Like inside a spacesuit, hearing the oxygen run out and you feel yourself gasping for air in the movie gravity...

Repooc, I hope you enjoy your new atmos setup as much as I enjoy mine!!
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2kfire wrote:
Feb 25th, 2019 9:40 pm
Maybe it’s just me but I don’t see an HF driver?
It's a coaxial setup... I should have taken a pic to help explain it (figured i'd get asked this question)

The mid-range driver actually has a hole in the middle of the magnet and is threaded. The cone of the driver is acoustically transparent.

The HF driver is a smaller module that is also threaded and gets screwed into the hole of the magnet in the mid-range driver.

If I can find a pic online i'll post it.

Edit:
Found a pic... This one is assembled, ie: the HF driver is screwed into the hole in the center of the mid-range driver magnet. If you look in the background of this pic, top left corner, you can see the HF driver by itself.
a7b4e6c7_DSCN3511.jpeg
Last edited by Repooc on Feb 25th, 2019 11:51 pm, edited 2 times in total.
[OP]
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discoblues wrote:
Feb 25th, 2019 10:18 pm

What is the first atmos movie you watched (or plan on watching?)
Thanks!!

I just bought A Quiet Place 4K disc this afternoon... Although ive already seen it a few times, i cant wait to experience the Atmos effects. And will definitely be the first movie I re-watch.

Then i'll probably follow that up with Ready Player One, then Gravity, then Hunter Killer, then Fury, then A House With A Clock In Its Walls... The list goes on and on.

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