He will also specify all the surface acoustic treatments for the interior of the room once the Iso-Wall has been installed. 8 shows my room with the channels installed. It was a wholesale transformation, not a matter of minor improvements in a few areas. As home integration becomes more prevalent within the consumer electronics industry, the listening room is quickly loosing its priority and perhaps more importantly, its purpose. This entry was posted on Friday, September 26th, 2014  Authored By: Robert Entenmann. The floor is a concrete slab, with solid-block wall construction and a cathedral ceiling 23' high at the rear—there are no floor-to-ceiling resonances. All these subtle forms of distortion add up and contribute to a hi-fi system sounding like a facsimile rather than like the real thing. Moreover, a good-sounding room is a great boon to my work—it is a platform for evaluating products that is commensurate in quality with the products themselves. Then, as the wall releases that energy over time, the transient’s decay is smeared. A room that is designed to diffuse sound is optimal for two-channel applications. When standing in the hallway in front of the door with music playing at a high level in the listening room, you can detect that music is playing on the other side but it’s not nearly loud enough to disturb anyone. The sound had a solidity in the bass, a sense of effortlessness on dynamics, and an expression of music’s rhythmic flow that I had not heard before from this equipment. However, if it’s quality you’re after: an experience that is both exciting, visceral and as the artist intended it, then a dedicated listening room is what you seek. Did I go far enough? I had always assumed that this was simply part and parcel of reproduced music—a characteristic of amplifiers being pushed, or the mechanical structures in loudspeakers reaching their limits. The letter writers believed that optimizing the AC power to an audio system is symptomatic of audiophile overkill, and of turning an audio system into nothing more than an object of status. I could use just about any piece of music to illustrate this precise sense of pitch, bass articulation, and dynamic agility, but I’ll choose one that many of you are undoubtedly familiar with and one in which the sonic improvement rendered a large difference in musical perception: “Diamonds on the Soles of Her Shoes” from Paul Simon’s Graceland. Jonathan Valin wrote the following essay in response to the […], Three summers ago, Grammy Award-winning composer-arranger-bandleader Maria Schneider premiered her […], Bill Schnee is a producer, Grammy Award-winning engineer, and author […], Unless you are still one of those holdouts with a […]. The resulting wall structure—viscoelastic damping sandwiched between two drywall layers—forms a classic constrained-layer damping system. The ceiling height of the rooms surrounding the listening room is either 10′ or 9′, lower than the listening room’s 11′ height. I had used Audience’s earlier generation of in-wall AC cable in another house with excellent results. To see how I chose the listening position and speaker placement, check out our room and speaker layout guide. Incidentally, you can download a PDF of the Iso-Wall installation guide from ASC’s website. Most reputable integrators are capable of providing an outstanding home theater experience; however if you want a zero compromise approach, then we highly suggest consulting with NYC’s premier two-channel architect, HFDG. You can also see the perimeter gasket (black strips along edges and around the door) and the wall-bearing felt (the white strip along the floor at the wall). This is advantageous because the surrounding rooms’ ceiling framing helps to reinforce the listening room walls and give them greater structural rigidity. You can follow any responses to this entry through the RSS 2.0 feed. I did, however, adhere to Art Noxon’s specification that I damp the 2×6 studs by attaching strips of 5″-wide and 1/2″-thick plywood to the side of each stud, with two strips of ASC’s WallDamp, a self-adhesive viscoelastic damping material (Fig. If you have the chance to build a house, the cost of ASC’s Iso-Wall is without question the best allocation of your audio budget. My room is 27′ long and 17′ wide, and the ceiling is 11′ tall. I also used the Acrolink 8N-PC8100 Performante Nero Edizione cable. If your two-channel system does not have a dedicated room, it is quite possible that these grand envisages will be relegated to the imagination and the pros in this article. High Fidelity Design Group employs seasoned professionals who will work closely with your integrator to make certain that the utmost attention to detail is paid to integrating a quality two-channel system into your home entertainment environment. But first you should know that a wall’s “transmission loss” (reduction in sound amplitude from one side of the wall to the other) is specified as an STC (“sound transmission class”) rating. But hearing the system in the new room made me realize that much of this congealing of the sound on musical peaks is the room distorting, not the speakers or amplifiers. Remember that the WallDamp Strips and WallDamp Squares are self-adhesive, requiring that you remove a release paper on both sides of the strips and squares. Moreover, wall shudder masks the delicate spatial cues that our brains need to form the sense of a fully developed soundstage, the space within it, and the impression of bloom and air around instrumental outlines. The tool plots all the resonance modes graphically, shows you if the resonance distribution meets the “Bonello Criterion,” and suggests ideal ratios, among other analyses. In-walls are rarely a good option for two-channel because they don’t provide imaging, sound staging, and three dimensionality as authentically as floor standers, and if they do it’s via very complex DSP (digital signal processing) which compensates for the room but ultimately results in coloration. It involved screwing and gluing, rather than nailing, the wall structure together. To achieve full soundproofing (such as would be required in a recording studio in Manhattan) a double-door structure is required. In addition, one of the room’s long walls is connected to a perpendicular outer wall, adding stiffness. However, achieving ideal acoustics for realistic music reproduction and presentation is an altogether different venture. Tags: audio vs video, listening room vs home theater, Robert Entenmann, the listening room, Your email address will not be published. Then WallDamp Squares (4″ by 4″) are applied to the drywall face 12″ on center (Fig. The higher the number the greater the wall’s attenuation of sound. And so I can play the system louder and still maintain the sense of ease and clarity of individual musical lines. Did I go too far? Would the room sound any better than a conventional room? In order to keep with a long tradition, we also awarded Best Sound awards. I went to my local Lowe’s and loaded up a lumber cart with sheets of plywood and wheeled it to the lumber-cutting area. As Art Noxon explains in the sidebar, however, soundproofing and optimizing audio quality inside the listening room is more complex than simple soundproofing. The finished and painted room looks just like any other room in the house—the acoustic infrastructure is completely invisible behind the drywall. The first layer of drywall is laid up vertically and screwed to the channel’s wide face. Remember that the resilient channel allows the interior surfaces of the listening room to bend but not vibrate, which is a key element in a constrained-layer damping system. This is our last house, and I wanted to get all the details right. The channel is laid out in horizontal strips across the studs and screwed to each stud it crosses. I went through 17 tubes of oversized (29-ounce) acoustical caulk. Such an experience allows the listener to quite literally transcend spacetime, teleporting them to witness Beethoven’s 9th, the orchestra and choir before you in their respective positions. That’s on top of the cost of the additional layer of drywall. But it is by no means the state of the art. High Fidelity Design Group | High-End Audio Austin, TX - HiFi | High-End Audio | Amplifiers | Speakers | Turntables The pipe organ is most notable when referring to the acoustics of the church, the choir being a close second. We marked their rooms with special stickers with the anniversary (15 years) "High Fidelity" logo. Moreover, the energy dissipated in the viscoelastic damping is energy that’s not putting the walls into structural resonance. The walls adjoining the hallway and garage are framed 2×6. Don’t scrimp on the caulk; tiny gaps can allow a surprising amount of sound through, a phenomenon called “flanking.”. At a minimum you should use a solid-core door with a door-seal kit such as ASC’s DoorKit. I cannot stress enough that two-channel applications require an entirely different and specialized skillset than that of home theater. Because my listening room is also a mastering room, it has to be as accurate as possible (see photo 1). It was thus with great anticipation that I listened to the first music in the new room. Back at the raw-framed listening room, I conducted an experiment to understand the effect of the stud dampers. During the many long hours working on the listening room, alone with my thoughts, I wondered if what I was doing was worth the expense and effort. The room’s five dedicated 20-amp AC outlets for the audio system are wired with identical lengths of 10AWG on the same phase. Moreover, the wall movement is chaotic. Perspective By one standard, this room’s design and construction are expensive and elaborate. The specialized acoustic door I chose (the Studio 3D from Acoustical Surfaces) weighs 300 pounds, is 2 1/4″ thick, has a robust three-point latch system, and cost about $4000. This sense of life continued throughout the song, anchored by the tight kick drum and Kumalo’s extraordinary inventiveness in playing his instrument. I’ve been reviewing high-end audio equipment for 30 years, and for 30 years I’ve hauled big and heavy gear through the front door of a house. Dec 29, 2019 - 809 Likes, 21 Comments - #w_s_d (@worldsoundigest) on Instagram: “#Dynaudio #Confidence C4 #speakers driven by a full #McIntosh electronic setup #hifi #highend…” Many weeks later, just before the drywall went up, I applied strips of ASC WallDamp viscoelastic material on the stud edges that face the house side of the wall for additional wall damping (Fig. I also would have hired someone to help me with the installation; it’s a huge amount of work for one person, particularly one whose day job is largely sitting at a computer. 3). For instance, most home theater environments necessitate in-wall speakers because clean lines and visual aesthetics are important to the consumer. After replacing the stock outlets with Shunyata outlets in the new room, the bass was fuller and deeper, textures were more densely rendered, dynamics wider, and the sense of individual objects existing in space was heightened. Then I repeated the hammer strikes after installing the stud damper. The idea is that the different wallboard densities will exhibit different resonant characteristics, and thus distribute the resonant energy that remains over a wider band but at a lower amplitude. Convenience is what drives the trend to combine one’s listening room with their film room. If you find equal value in both art forms, then there is still a solution. I had the feeling that an artificial limit had been lifted from the music, allowing its full dynamic expression. The room is now ready for surface treatments. As a result, the sound had a delicacy and density of information that accurately conveyed instrumental timbre, while also vividly portraying the size of the recorded acoustic and the spatial perspectives between instruments and between the ensemble and the surrounding hall. After evaluating the possible construction techniques for my room I chose one that simultaneously solves all three of these problems. Replacing the EL34 tubes with the KT120 showed that the amplifier has its "basic" sound, because it kept high dynamics, contour and transparency. Called the ASC Iso-Wall System, it is a building method that achieves excellent isolation of the listening room (sound proofing), nearly eliminates wall shudder, and absorbs excess bass. This wall construction is more effective in reducing the transmission of sound, but is expensive and consumes some of the room’s real estate. Wonder what a multimillion-dollar room looks like? Press Esc to cancel. A small tweak is to specify different densities of drywall for the two layers. The channel’s springiness “floats” the drywall on the channel, reducing the energy transmitted from drywall motion to the framed walls and ceiling. But overall, it was well worth the research, time, effort, and expense. Once the gasket and felt are installed you’re ready to attach ASC dRC-1 resilient channel to the studs and ceiling joists. Explaining the importance of room ratios is beyond the scope of this article (The Complete Guide to High-End Audio’s chapter on room acoustics breaks it down), but know that the length-to-width-to-height ratio is the crucial starting point. I’m hearing those qualities in the new room, and I speculate that it’s because the Iso-Wall structure is doing for the listening room what the inert speaker cabinet did for the loudspeaker—reduce the low-level chaotic motion that imposes a threshold below which information cannot be resolved. A bay window hidden behind the curtains disperses the lengthwise room mode by varying it between 18' and 20.6'. I’ve worked in audio all my life, from selling stereos to put myself through college (degree in Recording Engineering), recording studio owner and recording engineer, college teacher (recording engineering), CD mastering engineer, and audio writer for the past 30 years. Two weeks after moving in I got the reference system up and running (see sidebar). In practice, I need only three: one for each power amplifier and a third for the front-end components. Even if you hire out the Iso-Wall installation the cost is still reasonable when viewed in context of the price of today’s high-end systems. I spent the next eight weeks listening to the system powered by the stock outlets. Their sound vibrates in us just like when listening to live instruments, especially if we are in a small room with them - just like in our listening rooms. I could hear fine detail in the lowermost octaves. the Siltech Triple Crown cables. (Builders and subcontractors don’t like to do things that are outside the ordinary, and quote very high prices to discourage custom work.) A standard 2×4 wood-framed wall (16″ on-center) filled with insulation and with 1/2″ gypsum board (drywall) on both sides is specified as STC-35—not a very high value. In the majority of home entertainment applications, having a single location makes sense both economically and in terms of space constraints. Although one can spend an enormous sum on a custom AC-power system, I employed a few simple and inexpensive techniques that Caelin Gabriel has found to be effective. The majority of home theaters are completely over deadened (far in excess of 20%), and for good reason: movies have very intense bursts of low and high frequencies, such as explosions, propagating contemporaneously into the theater. The free downloadable spreadsheet performs a detailed acoustical analysis on any set of ratios that you enter. The value of music is definite and timeless. It was also a great learning experience. I was thus able to listen to the effect of the custom AC outlet independently of any other variables. The size, i.e. Moreover, the sound of kick drums varied more from recording to recording than I’ve heard before, suggesting that their “sameness” I’ve experienced in the past was the room’s sonic signature imposed over the drum’s sound. When the wall is flexed by the acoustic pressure of low-frequency sound inside the room, sheer forces in the viscoelastic layer dissipate that energy as a minute amount of heat in the viscoelastic material. What details had I overlooked? It’s a job in itself to clean up the backing paper from these strips, squares, and rectangles, but it has to be done or you’ll end up with a floor literally covered in it. This is also the reason, that the HRS-120, and other loudspeakers from this company, MUST happen in our listening room, and not only in an audio salon. I treated the inside walls with the Acoustic Geometry Pro Room Pack 10 that I had been using successfully in my temporary rental house (see my review in Issue 291). Hi-fi systems have always seemed to me to change their character on loud peaks, or when the music is played loudly. Before telling you about the room’s design and construction, I’d like to state that a dedicated room is most certainly not a prerequisite to musical enjoyment. There was a quiet between the notes that heightened the impression of realism. Next, a strip of self-adhesive “wall-bearing felt” is attached to the floor where the floor meets the walls. But if you take that plunge and the stars align, a room specifically designed for optimizing sound quality can allow a high-end system to realize its greatest potential. Move a few feet away from the door and the sound is barely detectible. Here’s the rundown: Digital sources: Aurender W20 server, Berkeley Alpha Reference Series2 MQA DAC, Berkeley Alpha USB interface, Audience Au24 USB cable, AudioQuest Wild Digital AES/EBU Analog sources: Basis Audio Transcendence turntable with SuperArm 12.5, Air Tight Opus cartridge, Moon 810LP phono- stage Electronics: Constellation Altair II preamplifier, Hercules II power amplifiers AC power: Shunyata Research Hydra and Triton, Sigma AC cords Cables: Shunyata Research Sigma (balanced) Equipment racks and amplifier stands: Critical Mass Systems Olympus, CenterStage2 isolation Surface acoustic treatments: Acoustic Geometry Pro Room Pack 12. Constrained-layer damping is widely used in many industries and is a science unto itself. 6 (and in some of the subsequent photos). The solid-core door performed much better than I thought it would, attenuating the sound quite well. I would implore anyone reading this article that loves music as much as I, to ask themselves where their priorities lie? Before describing ASC Iso-Wall, I’ll tell you about the listening room’s wall construction. With home entertainment rooms reaching in excess of seven digits in some cases, it is prudent to have a specialist for each function of the system. In practice, the listening room’s dimensions are also influenced by real-world considerations such as the amount of real estate you’re prepared to commit to the room and how the room fits into the floorplan of the rest of the house. For a nominal additional cost you can use 5/8″ Type X Sheetrock on the wall outside the listening room and gain a few dB of additional transmission loss. In relation to the expense of building the house, the cost of the Iso-Wall and studio isolation door ($13,500) was incremental. The bottom line: a home theater environment is far from ideal when attempting to recreate a live musical performance with authenticity. In my previous house I had compared dedicated AC lines and custom outlets to stock AC with stock outlets, but never to just the outlets themselves. 1). But it was only after living with the reference system (see sidebar) and its much deeper bass extension and wider dynamic scale that I came to fully appreciate the room’s contribution (or more precisely, lack of contribution) to the sound. After discovering the importance of the listening room’s contribution to sound quality, I consider it another component in the signal path and will list the ASC Iso-Wall System as part of my reference system in future reviews. Art Noxon has called this phenomenon “wall shudder.” Wall shudder colors the bass tonally because the walls will vibrate at their natural resonant frequencies, adding energy at that frequency. Music ought to command the same respect that film does insofar as its application is concerned, instead of being a well integrated afterthought. Fig. I brought to the house the system I’d been living with in the temporary space—Piega C711 speakers, First Watt F7 amplifier, Berkeley Alpha DAC Reference Series2 MQA, Aurender W20, Berkeley Alpha USB, Wireworld cable. I was beyond shocked by what I heard. High-level peaks maintain the same clarity, resolution, and timbral quality of the lower-level signals. After the bass clarity and dynamic fidelity, the next most dramatic and musically significant aspect of the room’s performance is the absence of this phenomenon. I will just add, that in this case the test was not with my Luxman M-800A (actually not mine anymore…), but with the mentioned Tenor Audio 175S and with the turntable Avid Acutus Reference with Miyajima Laboratory Waza cartridge. The drywall is thus rigidly attached to the wood-framed wall only along the wall edges where it meets the perimeter gasket. You can also hang vinyl material inside the wall for even greater isolation. Go to keithyates.com to see what’s possible at the state of the art. After living with the finished room for about three months at the time of this writing, I’m very happy with the size and feel of the space. I chose a construction technique that I thought would give me the best performance for my budget. See more ideas about fidelity, audiophile listening room, audio room. But as a rule of thumb when you’re all looking for rooms that you want to do music in, go 14-foot and higher and we’ll have at least something to work with acoustically. First music in the bottom end was apparent on just about any,. Used in many industries and is a double 2×6 wall with an unbridged air cavity of in-wall AC in! 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