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Raven's Haven Cinema and Listening Room (Read 1541 times)
Lonely Raven
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Raven's Haven Cinema and Listening Room
12/01/13 at 18:50:47
 
I snapped a quick photo today. I've still not been able to start building my own 1D and 2D diffusers for the side and back walls (and eventually to be put in front of the big screen during critical listening) - But here is where I am now.



Home Theater side is an Onkyo TX-SR805 Surround Sound receiver going out to Elemental Designs Home Theater speakers (very few sets were made unfortunately). The source is primarily my Home Theater PC that I built myself with 12 Terabytes of space on hand, and a Comcast Business Grade cable supplying my link to the outside world. Also have a Sony PS3 for Blu-Ray and Games. Everything filtered by various Monster Home Theater power conditioners.

Two Channel side is currently an Oppo BDP-105 Universal Player, usually playing FLAC files from the server, or off portable hard drives. Source then goes directly to my "vintage" Zen SE84-A modified by Steve, then out to my MG944 (with built in crossover). Cabling is Decware Silver Reference IC and my own 10AWG version of the Zen Styx.

The room is roughly 25' X 15' and is unfortunately L shaped. I have several DIY bass traps including the old Decware design CWALLs, my own design super-trap (left wall), and several acoustic blankets behind the equipment racks. I have a spattering of DIY broadband absorbers, and some RPG absorbers that are slowly getting placed as I figure out where they are most effective. The ceiling has some RPG 2d diffusers, and I'm slowly adding RPG absorbers up above. The back and back-side walls (not shown) are a spattering of DYI 1d diffusers and "acoustic wallpaper tiles" - much of which will be replaced with 12" deep 1D diffusers of my own design, as soon as I get the funds and my garage back in order.

More to come!  ;)

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« Last Edit: 12/01/13 at 18:51:13 by Lonely Raven »  
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Auguie
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Re: Raven's Haven Cinema and Listening Room
Reply #1 - 12/02/13 at 22:44:48
 
Very cool LR...what are you using for a projector?
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Decware SE84CS M Monoblocks & HDT Speakers; First Sound Presence Deluxe MK I Pre Amp; Wyred 4 Sound DAC-1/Oppo 971H (as transport for now); VPI Scout/Dynavector 10X5 Cart; Phonomena II Phono Pre; Magnum Dynalab FT101A Etude Tuner; XLO/Wireworld/Signal Cables.
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Lonely Raven
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Re: Raven's Haven Cinema and Listening Room
Reply #2 - 12/03/13 at 00:44:51
 

It's a Mitsubishi HS5500 projector. I lucked into a win on a slot machine back in '08 when Brianne's parents took us to Vegas. That was the start of the home theater. The Onkyo receiver was a good deal on a refurb, and the screen I built myself - it's made of 1X3 wood frame with white countertop material pinned to it. If it wasn't this collection of good deals and DIY, I wouldn't have been able to afford it!

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beowulf
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Re: Raven's Haven Cinema and Listening Room
Reply #3 - 12/03/13 at 05:51:56
 
What a cool place, I dig all the room treatments ... did you use a measuring device before applying them?
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Lonely Raven
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Re: Raven's Haven Cinema and Listening Room
Reply #4 - 12/03/13 at 06:00:45
 
I do have an old school measurement microphone that uses phantom power (mixing board) that I used when I first setup the room, but that was mostly for when I built the 21" subwoofer with the 2000 watt amp. I tumbled the big bitch around the room and took measurments to figure out which was the least damaging in the main seating position (read, *my* chair!  ;) ).  

For general reflections and imaging I've just been doing it by ear as I have a good ear for reflections and reverberation. Back at my old apartment when I first used REW to measure the room, it was because I kept hearing this reflection that was causing distortion...turns out it was a 5ms reflection on the ceiling...I was stunned that I could hear it, but the software backed that up, and tacking a blanket to the ceiling (temporarily) resolved the issue. That's part of what got me so serious about room treatments; being able to discern a 5ms reflection reinforced how much the room plays a part in the overall sound.

If you want your soundstage to be sharp, you need to give your ears a *clear picture* of the source audio...and *then* the reflections.

After I get the ZMA paid for and in my hands, I'm going to purchase a USB measurement mic and retest the room. By then I should have the garage put back together and can start making my 1D diffusers for the sides of the room as well.

Lots of work, but it's so going to be worth it! You think you can hear a difference in the chain now, once the room is sorted out, I'll be able to drop any sort of gear in here and really give it a listen!
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« Last Edit: 12/03/13 at 06:03:05 by Lonely Raven »  
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Digger
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Re: Raven's Haven Cinema and Listening Room
Reply #5 - 12/14/13 at 02:34:58
 
Lonely Raven,

      Been looking at your room diffusers and was wondering about the diffusers on the ceiling. I was wondering if there is a distance that you are using on the diffussers directly above the speakers from the front of the speaker out into the room. Looks as though your speakers are directly under the first set. I'm thinking of doing something like that on my cathedral ceiling. I believe that is my largest source for room reflections. I was hoping to maybe do it with six of them total and the ceiling height is about 7 feet above my speakers on the right channel and about four feet above my left channel speakers. The center highest point is 12 1/2 feet high by the main beam. Is there any method to my madness that I should consider for distances out in front of the speakers. Really don't want to make holes in the ceiling till I'm reasonably sure where I am putting them. I know I am not able to explain it to the point you can get a visual on the room so maybe you could give me some ideas of what I should pay the most attention to.

Thanks for your help. Shoot me something when you get a chance!



Smiley



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« Last Edit: 12/14/13 at 02:39:30 by Digger »  
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Lonely Raven
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Re: Raven's Haven Cinema and Listening Room
Reply #6 - 12/14/13 at 03:11:49
 
I have more absorbers and diffusers than I need on the ceiling right now, but that's partly because it's helping both my two channel system that I sit up close for, and my home theater, which I sit another 5 feet back from the two channel seat. So the excess is just to cover a wider use.

The key to room treatment placement is using the mirror trick.

The mirror trick is having someone run a mirror over the ceiling (or side walls etc) while you sit in your listening position. When you can see your tweeter in the mirrors reflection, that's where you put your sound treatment. From there you can adjust by ear, or use a measurement tool like REW to measure the Frequency Response of the room, and the decay (room reverberation)

Sound treatment isn't to deaden to get rid of all reflections, it's a tool to dial in frequency response, and especially control the timing of the reflections.
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« Last Edit: 12/14/13 at 03:12:37 by Lonely Raven »  
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