Home Theater Setup - www.AcousticFields.com

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- - In this video we're going to talk about home theater setup and what the step by step process looks like. Watch the video to find out more!
#acoustics #audiophile #producers

[@caldasnake16]

Hey, Dennis! Long time subscriber here from Rio. You literally taught me everything I know about acoustics and I've watched dozens (maybe hundreds) of your videos over the years. I love your "keeping it real, no BS, no gimmicks" approach. Even though I've never had the privilege of experiencing a true high end system in a professionally treated room, just by following your teachings and some simple, basic guidelines in my humble small room, it literally transformed the way I enjoy my HT -- night and day difference. Despite the small room size, I got lucky with the window located in the middle of the rear wall and it still baffles me to this day, that just by leaving it open makes the best "treatment tech ever" without spending a dime. It's crazy that quite a few of my friends and family said my simple limited setup, with some cheap acoustic foam + a nicely placed window, it's the best audio they've ever experienced, so I can only imagine what a true pro setup in a large room feels like... Anyway, as a HT fan, mostly for gaming and movies, I've always wanted more content about it. Glad to hear there's more coming. As always, thanks for the content and keep it coming!

[@AcousticFields]

Thank you for your kind words. We try and make the very complicated as simple as possible without creating more "distortion"

[@johnbeeck2540]

Great explanation as always Dennis!

[@AcousticFields]

Glad you liked it!

[@__the_ufo__8462]

I hope that in my future room of 6000 cubic feet that treatment of the problem corners will help fix the problem however I wonder how the room will perform if I dedicate 1200 feet to bass absorption leaving a 4800 feet room? Anyway off to start building a 18ft front width by 21ft rear width room by 16ft high and 30ft long room

[@AcousticFields]

The corners of any room are never the issue. Room modes are produced by a minimum of two parallel surfaces. It is the whole wall surface that must be treated.

[@recordman555]

Dennis, I love the way you're capable of describing acoustic properties in terms that the typical layman can appreciate. If I knew the price was right, and I could convince my wife as to the move, I would seek employment with your company post-haste!

[@AcousticFields]

Thank you for your kind words. We try and take the very complicated and simplify it down into examples that illustrate at least the general concepts trying not to add any more distortion to the acoustic field.

[@djhmax09]

Awesome Dennis, thank you!

[@AcousticFields]

Glad you liked it!

[@__the_ufo__8462]

Good job Dennis! Good videos. Directional does help in midrange and high range. I prefer round dispersion of towers instead of point source book shelf speakers.

[@FOH3663]

(4)18"s isn't overkill. In systems striving for single digit extension, EDM, home theater, mastering, etc., (Dolby spec for LFE or .1 channel is 3hz-120hz) it takes 𝙖 𝙡𝙤𝙩 𝙤𝙛 𝙙𝙞𝙖𝙥𝙝𝙧𝙖𝙜𝙢 𝙖𝙣𝙙 𝙖 𝙡𝙤𝙩 𝙤𝙛 𝙨𝙩𝙧𝙤𝙠𝙚, ... for playback of low distortion, bottom octaves, at realistic levels. Each octave in extension requires a quadrupling of drivers. And including redirected bass the .1 sub channel requires 121dB-126dB for reference level. So, say one has a killer system capable of +120dB flat and clean to 24hz. A world class rig. Two of the best subs per side. 24hz is fantastic, however, two octaves lower capability (6hz) now brings single digit material into the experience at the proper level they were intended to be experienced by the film's team. One prime example is the 6hz chopper energy, ... as in Lone Survivor, Blackhawk Down, etc. Also, there's countless examples of music whereby the LF content plunges deeper and deeper, at even higher levels of clean synth bass. That two octave of extra capability requires 16x the original quantity. That's 32 (!) subs per side... this extraordinary requirement has driven development of Eminent Technology's TRW 17, and other approaches. Quad 18"s is modest in these contexts. I've implemented a quad 18" IB, w/four 15"s in sealed... and my system is quite modest in my opinion. Yes, one's LF room decay must be in check, even with mammoth amounts of capability, ... if not it's simply resonant mush.

[@AcousticFields]

The room only sees energy. It could care less what the source is no matter how technically specific the source . You must balance the energy input into the room with the distortion output of the room.

[@natenissan1339]

Lol, (4)18s my room is actually very similar 10x12x8 and I have 1 10inch Klipsch and it's perfect. Dealing with sound makes the biggest difference. I have treated everything after doing research and got the decay down to 2-3 seconds.

[@AcousticFields]

What is the frequency response range of that decay rate?

[@AmazonasBiotop]

Wow I would take 4 18" subwoofers plus a miniDSP any day of the week. Than a decay time of 2-3 seconds at ANY frequency range.. ..but I am a 2ch music guy (using 2 18" OB already, and if you never experienced OB it is time to do that! Cancelation effect on the end of the baffle makes them to load the room FAR less in a 8 pattern than a 18" in a box that makes it omnidirectional) and not a home theater guy that need something to shake for several seconds.. The worst I have seen is 1 second at 20/30 Hz. No DSP and no treatment.. I do not remember my measurements but something ~0.5 @20 Hz and all the higher is @0.3s. Imagine some frequencies leaving your woofer and still bouncing around in your room after 2-3s that is catastrophic in my book as you will have hard time to hear texture and tone when the previous note is still hanging around and you can not hear the next one (smearing). Maybe that works as impressing a friend the first minutes but very tiresome in the long run. But home theater is not listening as it were music. HT is effects and sudden bursts in musik it is more a repetition over and over with some shanges as melody. So probably more anoying wit music. Try to play som bass rich music and hear what is happening? 🤔🥰

[@FOH3663]

@@AmazonasBiotop You're right. Open baffle, simply by it's inherent dipolar output prevents that destructive pressurization energy overlay ... that plagues monopole bass sources in rooms. Siegfried Linkwitz for the win.

[@ryanpellico6083]

I'm confused about what you say about driver size couldn't you use a speaker larger drivers but play at less volume for smaller room like a speaker with smaller drivers playing at a louder volume doesn't the volume matter more than the driver's size

[@AcousticFields]

There are many variables to consider. Its always a balance between quality and quantity. Smaller drivers are more resolute with less output. Larger drivers are less resolute but produce more output. You must then examine the average pressure level used within the room size and volume and then decide what you are wanting to achieve in the total presentaion value.

[@Andrewc87563]

Just noticed no centre voice channel for speech in your layout. Shall keep an eye on a future video about this as I’m sure you haven’t missedthat

[@AcousticFields]

The center channel feed is split into a left center and right center signal. All front of the house speakers are the same.

[@FOH3663]

@@AcousticFields Why split into a left center, and right center?

[@AcousticFields]

@@FOH3663 To keep the soundfields consistent. When you have high resolution rooms, everything is heard and everything matters. The soundfield generrated from center channel speakers is not consistent in its distribution array with the left and right channels.

[@bjmsamrlm]

In my moderately treated room, phantom center produced poor localization (all but the MLP are off axis) and excessive comb filtering (typical of a mono signal emitted by two sources), which I corrected by placing behind my AT screen a C speaker identical to the L and R speakers that achieves a consistent sound field.

[@andysummersthxcinemaandmyc7748]

this is all total bs . said the spider to the fly

[@AcousticFields]

Can you be more specific or are you just complaining for the sake of hearing yourself.

[@andysummersthxcinemaandmyc7748]

@@AcousticFields i hear myself crystal clear without the bs , of chalk on blackboard . where's the actual speakers the actual test tones and stuff being used to show in actual practice rather than a blackboard all the time . i do happen to have 165 IQ score so i know when there is some bs and so do many others . honest is the best way . i read around and everyone is saying , scam . to trick those that are less savvy and spend out $ tens of thousands . the thumbnails are misleading . once click on its a blackboard . i saw blackboards when i was at school 45 years ago . i not seen any practical videos of speakers and stuff placed around a room or same test done outdoors . or in the area-51 desert where there is miles of open space to do speaker testing till blue in the face . to show what actually happens with long wavelength frequencies , not on a blackboard . just like , gr research a load of talk and no actual measurements . when i and others can show something not that it's going to be applicable to anyone else ? bass traps a load of bs . room treatment on the walls so i don't hear the rooms bare walls when clapping my hand or popping a balloon . and yes i can still hear directional sound from x5 JBL 4673A behind my at-screen along with x11 side rear wall surrounds in correct way as cinema . none of that one pair for the sidewall with rows of seats , that's not how it works ? and a lot more besides that . and as for hearing myself you mean , ego ? or am like some dog out there yelping ? lol woof , woof .