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  1. I’m in the process of building a speaker (and lighting) cloud that will enable me to add in-ceiling speakers for Dolby Atmos, and I was hoping I could tap into the vast experience you guys have developed over the years building and tweaking your home theatres with Klipsch speakers. This is going to get a bit complicated and I apologize in advance, but I will do my best to provide you with as much context and information as possible so that you can advise me on the best route forward. Now the reason I need such a complicated solution is because I have a cement slab for a ceiling, so I can’t mount in-ceiling speakers in the ceiling directly. I’ve also used this as an opportunity to build an interesting drop ceiling effect with secluded LED light strips around the perimeter ceiling and my cloud in the middle – just in case you’re wondering why the madness… 😊 Here's what it will look like from ground looking up. The grey parts are the drop ceiling and cloud which drops 20cm from the cement slab (these will have secluded LED strip lights around them), the white part is the slab and the round white dots are LED downlights. The cloud will be built using 15mm thick Baltic Birch Ply (unless you have any better recommendations). I considered MDF but it’s too heavy. Apologies for the metric dimensions, but I’m hopeless at the Imperial system… [all dimensions in diagrams are in centimeters] I’ve purchased the PRO-180RPC In-Ceiling Speakers, and I have been in contact with Klipsch support seeking advice on what would be best for these specific speakers. However I wasn’t really able to get a definitive answer from them for my unique situation. This is the gist of what they say: “Our in-ceiling and in-wall speakers are designed to work with an infinite baffle so a speaker cloud with no backing to close it would work well in this case.” “The box size with not have any affect on the sound of the speaker. So build what ever size works for your building needs.” The reason why I do need some kind of partition for the speakers is because the middle part of the cloud will have slots cut into it and filled with Rockwool to act as acoustic dampening similar to this: https://www.genesisacoustics.co.za/productdetails.php?id=100101 to help deal with reflections from the ceiling. Since rockwool is fibrous and messy, I want to keep it away from my speakers. Having built speakers and subwoofers in the past, my first instinct is to build individual sealed boxes within the cloud for each speaker according to “perfectly calculated” volumes, however this doesn’t seem to apply to these speakers according to Klipsch. The other concern I have and reason for a closed system is to try and reduce sound from the speakers hitting the cement slab and transferring through to the neighbours upstairs (or at least any more than it does already). So here are the three options I’m trying to decide between, from easiest to most complicated to implement, along with any concerns I have with each: Option 1: Simple Partition As seen in the image above, I simply add a divider between the cement slab and cloud base (baffle) that stretches from one side to the other of the cloud. This is the simplest to construct and will save some weight. Concerns and potential issues: An LED downlight on either side of each speaker section will be included in the box. Not sure if this will have an adverse effect on the sound. There is nothing between the back of the open speaker and the cement slab above it, so I’m worried about more sound transferring to the apartment upstairs. I’m also wondering if cement slab essentially forming the back side of the speaker box will have a negative effect on the sound quality. Option 2: Sealed Partition that excludes the downlights This is exactly the same as the one above, except I’ve now added side panels to seal the speakers off from the downlights. Again, the cement slab will form the back side of the “speaker box”. Same concerns and potential issues regarding the cement slab. Option 3: Fully Sealed Speaker boxes This was my original and more ambitious plan. Here I’ve lowered the partition walls to 14cm and added a wooden back panel to seal the box off. There will be a 3cm gap between the 15mm ply board and the cement slab, which I will fill with 3cm thick rockwool in case it helps absorb the sound travelling through to the slab. Advantages (at least in my simple mind): Speaker has it’s own sealed box (Klipsch says this isn’t necessary, but I still can’t wrap my head around it, so maybe you guys can cure my stubbornness if I’m being ridiculous). Sound travelling through to the slab above could be reduced somewhat. Even Klipsch claim that their ME-800-C metal enclosure reduces sound transmission by at least 10db. The 3cm air gap and insulation could also help reduce sound transfer to slab. Disadvantages More time consuming to build More wood required, added expense and added weight. The weight is the greatest concern here. Taking all the above into consideration, which option would you guys recommend. If I can avoid option 3 with little to no adverse effects, then that would be preferable, but I’ve spent a lot on these speakers and the construction so far, so I want to do what is going to sound the best at the end of the day. I’m sure you guys know what I mean… 😉 Thank you for your patience and taking the time to read this, and I appreciate any input and advice you guys have to offer. Thank you Brendon
  2. Hello everyone! I'm new to this forum, but love all the shared info - I'm learning a TON! In the next couple of months I'm gonna get serious about a real HT setup and currently in the planning stages. I wanted to run my potential setup and speaker placement by this community and see if there is anything I'm missing to setup a Dolby Atmost 7.1.4 configuration. I've attached 2 drawings of my room layout to help visualize what I'm working with. Any and all feedback is welcome to help improve and optimize my setup. My grid was every two boxes equals 1 ft approx. Thank you! Front: RF-7 III Center: RC-64 III Rear: R-51-M Rear-Surr: RP-502S both Rear speakers and Rear surrounds mounted on 30 inch speaker stands. Atmos front mounted above front left and right speakers: RP-500SA Atmos mounted above the couch area 10ft off the ground. RP-500SA Sub: considering hiding it in the rear corner of the room instead of in the front: (the front speakers I've heard punches good bass + lack of space) SPL-120 AV: Denon AVR-X4400H or X4500 depending on whats cheapest and available. Paired with a XPA-3 Gen3 AMP or Outlaw 5000 powering the front stage. ( I must admit I'm not 100% clear on the difference between that emotive 3 channel vs. the outlaw besides the obvious fact that the outlaw has 2 additional channels. The Emotive seems like it has a lot of power for those 3 channels comparatively.) Thanks again for any advice, Spencer
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