Frequency and spatial irregularities are especially problematic in small rooms such as recording studios and listening rooms. Adding diffusion to the room is almost always beneficial. Acoustic diffusion removes the hard, specular room reflections that interfere with the direct sound of the loudspeakers. The PolyFlex diffuser is a 1D diffuser, meaning it will scatter either horizontally or vertically, depending on orientation. Combine both for full hemispheric scattering. Available in a 100% clear acrylic, or a neutral grey paintable 20 gauge metal with a damping sheet applied to the back to eliminate resonance. The PolyFlex Diffuser: ∙ Lab-tested, cost-effective, simple to install polycylindrical diffuser ∙ Can be used on walls, ceilings, or behind stretch-fabric systems ∙ Can offer either horizontal or vertical scattering What is unique about the acoustic performance of the PolyFlex compared to other diffusers? ∙ Adjustable 3”-5” depth for randomization (no frequency lobing) ∙ Minimum uniform dispersion of 150° of horizontal or vertical scattering (wider than any other type) ∙ Effective from about 630 Hz. and up (broad frequency bandwidth and no high frequency limit) ∙ No high frequency limit, even when off-axis (never casts a show upon itself) ∙ No theoretical listening distance (as number-theory type diffusers have) ∙ Though the PolyFlex is a pure diffuser on its own, the open sides can be loosely filled with insulation to add absorption properties The PolyFlex diffusers are very effective at dispersing sound. They offer wider frequency bandwidth, and smoother and wider off axis scattering than any other type of diffuser. They also have no minimum seating distance, as do grating number-theory (well or sky-line) type diffusers. A single PolyFlex can be used at a single listener reflection point, or multiple diffusers can be used to cover larger listening areas. Multiple PolyFlex Diffusers- It is good practice, when using polycylindrical diffusers, to avoid mounting four or more together with the same orientation, depth and spacing. Doing so can create repeated constructive and destructive energies at particular frequencies. Changing the spacing, depths and/or orientations will prevent such conditions. USES ∙ Improve tonality and clarity ∙ Improve soundstage, air and spatial imaging ∙ Improve surround sound envelopment ∙ Control first order reflections ∙ Eliminate flutter echo The PolyFlex can easily be fastened on walls and ceilings using drywall screws. They can also be concealed under stretch-fabric systems. They are typically used to control first order reflections, enhance surround sound envelopment, control flutter echoes, and/or to add more aural openness and sparkle to the space. PolyFlex diffusers can add sonic spaciousness to the room, air around the instruments, improve timbre accuracy and/or widen the soundstage. They also improve clarity in speech and spatial focus without making the room sound dead and/or small. PolyFlex diffusers can also be used at reflection points in place of typical absorbers when room reverberation times are already low. Once the reverberation times of the room are under control, it would be very difficult to have too much diffusion added to the room. How do you find first order reflections? You will need an assistant, a flat hand mirror, and some masking tape. These are geometric relations between the source drivers, the room boundaries, and the listener. There is a first order reflection for each speaker, on all six surfaces of the room. With one person seated in the listening position and the other person at the boundary surface of interest holding the mirror flat against the surface at about tweeter height, run the mirror around the surface until the listener sees the tweeter centered on the mirror. Mark this spot with tape. That is the first reflection spot on that surface, for that speaker. Repeat for the other speaker on the same surface. Repeat this process for the other surfaces of interest. Normally, you want to orient the diffuser so the sound scatters primarily to the front and back of the room. This would mean mounting the diffuser vertically on a wall, to scatter horizontally. Acoustical Specifications:
Effective Frequency Range- 630 Hz. on up Effective Coverage of incident Angles- 150° Physical specifications: Acrylic PolyFlex- MSRP $119.00 ea. Dimensions- approximately 23.5” x 23.5” x 3-5” (59.7 x 59.7 x 7.6-12.7 cm) Weight- 3.1 lbs (1.4 Kg) Metal PolyFlex- MSRP $145.00 ea. Dimensions- approximately 22” x 22” x 3-5” (56 x 56 x 7.6-12.7 cm) Weight- 3.6 lbs (1.6 Kg) Made in the USA Learn more at: avroomservice.com
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