Acoustic Treatment: Diffusion

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Diffusion

Auralex MetroFusor
Sound Diffusor - 12 per box (48 sq. ft.)

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Auralex T'Fusor
3D Sound Diffusor

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Auralex WavePrism Sustain Bamboo Sound Diffusor - 2 Pack
Two bamboo sound diffusors - 23.75” x 23.75” x 3”

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A major problem in small room acoustics is flutter echo. This is the ping-pong chatter you hear when you clap you hands in an empty room. You can eliminate this problem with absorptive panels but when too many panels are used in a room, it can become lifeless and dull. Diffusers and sound scattering devices solve the problem by dissipating the energy into the room to retain the natural high end and create a greater sense of space. The challenge however is that top end diffusers like the Primacoustic Razorblade are very expensive to build. The new FlexiFuser presents the user with a very functional alternative that is less than 1/3 the price. The Primacoustic FlexiFuser is 6" deep and features a full-size 24"x48" wall print. Six variable pitch diffuser slats span from top to bottom that may be rotated to various angles to create the desired energy spread. In effort to eliminate self-resonance, high density absorptive acoustic panels are discretely positioned behind the slats. These also reduce mid and high frequency flutter echo and help control primary reflections. When used in clusters, various patterns may be combined for maximum effect. Made from wood composite and finished in a washable black melamine, the FlexiFuser ships flat to save on freight and is assembled in about 15 minutes.

Primacoustic Flexi-Fuser Variable Pitch Diffuser - Black/Grey
Variable pitch diffuser, 24" x 48" x 8". Assembly required.

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The Primacoustic Razorblade is a high-performance quadratic residue diffuser that employs an array of 15 wells - specifically measured to break up and scatter acoustic energy to create a diffuse sound field. <ul><li>True quadratic residue diffuser</li><li>Full 8" deep with 15 wells</li><li>Diffuses energy from 400Hz up</li><li>Adds air and retains natural ambiance</li></ul>Large, heavy quadratic residue diffusers like the Razorblade are commonly considered to be the most effective form of sound diffusion as they are able to control and disperse directional sound energy all the way down to 400Hz, thus eliminating problems such as standing waves, flutter echo and primary reflections while retaining the natural 'air' and ambiance of the room. Razorblades are generally positioned at the 'receive' end of the room whereby sound entering the various wells is reflected back into the room at different times due to the various well depths. This effectively breaks up sound waves and their phase relationships, scattering the acoustic energy across a wider spectrum, eliminating resonant peaks. The Razorblade is ideally suited for studio installations, soft seat theatres, high-end home theatres and performance venues.

Primacoustic Razorblade Quadratic Diffuser - Black
True quadratic diffuser, 24" x 48" x 8". Assembly required.

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This unique product marries a high performance bass trap with a genuine QRD "well" diffusor that's effective down to the low midrange. The device transitions from diffusion to absorption over the range between 400 to 800 Hz. The RealTraps Diffusor can be easily installed on a wall or ceiling using the supplied hardware, or mounted without harming the wall using either of our attractive Stands.
 
All untreated listening rooms suffer from comb filtering, a particular frequency response error that creates numerous peaks and deep nulls. Comb filtering is a problem in smaller rooms especially, because of the proximity of the listening position to the rear wall behind. Numerous peaks and nulls occur at predictable quarter wavelength distances from that wall, badly skewing what you hear. For audiophiles and other critical listeners the result is a colored, often boxy and congested sound. For mix engineers comb filtering is even more troublesome - if you can't hear the music as it really sounds, it's much more difficult to achieve an excellent mix.
 
When placed on the rear wall behind the listening position the Real Traps Diffusor scatters mid and high frequencies, while low frequencies pass through the reflecting well membranes to be absorbed by rigid fiberglass behind. The membranes also increase bass absorption beyond what fiberglass alone could provide. Thus, comb filtering artifacts are reduced dramatically over the entire effective range.
 
The Real Traps Diffusor is 24 inches wide by 48 inches high by 6 inches deep and weighs 26 pounds [Metric: 61 x 122 x 15 cm, 12 kg]. It is available in either Far or Near versions, depending on the listener's proximity. The Far version has diffusion wells 6 inches deep, and is recommended when the diffusor is at least six feet away from the listener's ears. For smaller rooms where the listener is closer, the Near model is more appropriate. The Near model has wells 3 inches deep, and the bass trap portion is correspondingly thicker.
 
In the overall scheme of acoustic treatment, diffusion is more like icing on the cake compared to the staples of absorption and bass trapping. However, good diffusion can add a nice sense of spaciousness not possible with absorption alone. Diffusion also avoids comb filtering and flutter echo, but without reducing the room's ambience as does absorption.
 
Truly excellent diffusors like this are complex to design and build, and thus cost more than absorption which is simpler to manufacture. Even the best diffusors are ineffective below around 600 Hz, so absorption is still needed for those lower frequencies. We have developed what we believe is the ultimate diffusor because it offers the best of both treatment types. Indeed, two or more RealTraps Diffusors adjacent will create the ideal "rear wall" treatment for listening rooms and mixing suites of any size.

<UL>

<LI>Genuine QRD Diffusor with six-inch depth

<LI>Outstanding absorption at low frequencies, built using proven RealTraps membrane technology

<LI>Available in Near and Far versions the ideal "rear wall" treatment for listening rooms of any size

<LI>Affordable

Real Traps Diffusor
RealTraps Diffusor scatters mid and high frequencies, while low frequencies pass through the reflecting well membranes to be absorbed by rigid fiberglass behind.

This product does not qualify for free shipping.

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