My dedicated audio room build - QuadDiffusor's Big Dig

[MarkusBarkus]

...perhaps consider the front wall outlets to be closer to the centerline? Imagining equipment options, it seems to me that the feeds are all a good distance off the centerline.

For good reason, of course, but maybe a little hedge for the unknown/future options would be helped with those two outlets a couple of feet toward center, but still at the wall.

Raising the point; you know best how you envision the space/gear. Getting closer now! Cheers.

 

[QuadDiffuser]

Hey Markus, thank you for your comments. I was also thinking along those lines, to how to accommodate components placed closer to the centerline. The solution would be to make sure to have 2.0m of AC power cable emerge on both sides, so they'd easily cross over and reach the centerline, merely 1.5m away.

 

[Kingsrule]

IMO building a dedicated room and putting all the gear between the speakers makes no sense.
U want to have amazing sonics in a dedicated room yet you are going to have much of the primary sound field bouncing off of your gear, racks, etc....???? Not to mention the different frequencies, depending on what is playing, effecting the internal components of the gear. Yes I know there will be these effects no matter where in the room everything is placed but much less so than between the speakers....

 

[QuadDiffuser]

The components are going to be a foot off the ground, hardly alarming in terms of contributing to soundstage destroying diffraction.

True, in terms of ground-borne and airborne vibrations, having sensitive components sitting near the rear-firing subwoofer might not be the best idea after all. However, there are tangible benefits to having shorter interconnects between the source component and the amplifiers, then shorter speaker cables connecting the amps to the speakers.

In any case, there's still enough placement flexibility to place the components into two or three side-by-side racks further away, but (still) near the front wall. That particular location aligns with my preference for viewing the volume setting levels on the MSB DAC, as well as the album art and song titles displayed on the Aurender music streamer.

 

[pjwd]

Ca

The components are going to be a foot off the ground, hardly alarming in terms of contributing to soundstage destroying diffraction.

True, in terms of ground-borne and airborne vibrations, having sensitive components sitting near the rear-firing subwoofer might not be the best idea after all. However, there are tangible benefits to having shorter interconnects between the source component and the amplifiers, then shorter speaker cables connecting the amps to the speakers.

In any case, there's still enough placement flexibility to place the components into two or three side-by-side racks further away, but (still) near the front wall. That particular location aligns with my preference for viewing the volume setting levels on the MSB DAC, as well as the album art and song titles displayed on the Aurender music streamer.

As I recall there is a topping slab going in .. is it possible to run conduits under topping to locations as you have shown as well as conduits to a side wall location so you "future proof" the setup
For a buddy I did this kind of arrangement to conceal cables .. in his case he had enough depth to have outlets in floor recess but I think you are running continuous ?

Cheers
Phil

 

[asdffx]

侧壁的第一个反射点 - QRD 的表面

这是扬声器发出的声音撞击 P17 QRD 表面后发生的情况。

了解时间延迟（通过行进距离计算）和路径角度（因为它会影响对声场氛围的感知）非常重要。

直达声到达所需的时间：343米/秒（div）3.410米=1/100.59=9.94毫秒
第一次反射到达所需的时间：343米/秒（div）[1.653米+3.492米]=15.0毫秒（与下面的第二张图相匹配）
时间延迟 = 5.06毫秒


View attachment 147793

View attachment 147794

Listening "triangle"

The separation of 3.0 meters (9.85ft) between the speakers worked well in my smaller apartment listening room. For this larger listening room, it's going to be just a touch wider, at 3.1m (10.17ft), but remaining relatively closer together to ensure solid lower frequency coupling between the two speakers.

A 60-60-60 equilateral triangle configuration would place the listening position at exactly 3.1m, delivering a near-field listening experience. I'll try adding 10% more distance, pulling the listening seat away slightly, perhaps into the beginning stages of a mid-field perspective. The extensive room treatment with QRDs (on the front wall, side walls, and ceilings) will ensure that the direct sound from the loudspeakers will remain distinct and vivid even in the presence of an abundance of indirect sound (thanks to the decorrelation and randomization of the latter).

Though not shown in this diagram, the speakers will likely be toed-in slightly, between 10-20 degrees. While Damon Von Schweikert's tuning wizardry will be invaluable when he personally visits me one day, ZOOM calls likely suffice, in the meantime.

View attachment 147751

Very good acoustic design, full vpr low frequency trap, and then qrd diffusion in appropriate areas outside.
I think it is better to have some through holes in qrd. Otherwise, it may affect the efficiency of vpr on the back.
Or you can consider using prn algorithm (Bogic Petrovic), which has ventilation slots.
I built several rooms with vpr variants and prn last year, and I think the effect is very good.

 

[QuadDiffuser]

ASDFFX, thanks for your kind words.
How do I find out more about the PRN algorithm by Bogic Petrovic?
A Google search yielded no results.

 

[QuadDiffuser]

The construction of my dungeon audio room has finally started in earnest!
The front wall (which I’ll be staring at for a very long time during the next few decades):


A panoramic photo from the entrance door, with the front wall to the R:

 

[ADGold]

The construction of my dungeon audio room has started in earnest!

The front wall, which I’ll be staring at for a very long time during the next few decades:
View attachment 152954

A panoramic photo from the entrance door:

Although my dedicated room is a fraction of the scale of this room in terms of size, sophistication, and level of components/equipment, this image brings back a lot of memories of my room construction from two years ago - lots of excitement with equal amounts of stress and anxiety. Once completed, the level of satisfaction should exceed expectations.

 

[QuadDiffuser]

Choices of color themes: fabric (Espresso) and wood (mahogany).

 

[mxk116]

Color themes and wood choices:
View attachment 152960

I am vicariously experiencing your excitement and trepidation (as ADGold mentioned regarding their own experience) with every post.

I am eager, as you are, to see/hear the final result!

 

[QuadDiffuser]

Preliminary rendering of component placement to determine AC power outlet positions.

Speakers: Von Schweikert ULTRA.nines
Monoblock amps: Soulution 717 x 2
DAC: MSB Cascade/Sentinel
Preamp: Soulution 727
AC regenerator: PS Audio P15/20 x 2
Audio rack: HRS EXR series

Surprisingly, I'm finding out that there isn't a lot of space between the front wall's P23 QRDs and the back of the loudspeakers.
Instead of fanning out multiple active vibration cancellation platforms on the ground, I'll have to stack equipment on component rack shelves after all...



Very likely a triple-shelf combo, like this one:

 

[MarkusBarkus]

...it's gonna be epic.

 

[LL21]

Looking good! And look forward to seeing more as the room continues to evolve!

 

[Young Skywalker]

IMO building a dedicated room and putting all the gear between the speakers makes no sense.
U want to have amazing sonics in a dedicated room yet you are going to have much of the primary sound field bouncing off of your gear, racks, etc....???? Not to mention the different frequencies, depending on what is playing, effecting the internal components of the gear. Yes I know there will be these effects no matter where in the room everything is placed but much less so than between the speakers....

This is a good point however there are other important considerations here. By placing electronics between and behind the speakers one creates a more symmetrical sound field between the listening position and the loudspeakers. This is particularly valid where the frequencies above the lower midrange are only firing forward of the loudspeaker plane.

Rear firing low frequency drivers are less of an issue given the way bass interacts with the room. More critical is to ensure that the listening position is not in a primary room mode peak or null. Similarly, locating sensitive electronics and sources outside a region of high pressure should be considered.