Avalon Acoustics AVALON ASCENDANT manual First Reflection Points, Corner Treatment

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First Reflection Points

Since the ear/brain system tends to integrate the sounds arriving within a 10 millisecond time window, it is important to control the early reflections arriving from the side walls to the listening position. A hard-surfaced wall can produce a strong frequency-dependent reflection that can interfere with the reproduced sound-stage, as well as change the perceived tonal balance of the system. Therefore, damping these first reflection points is strongly recommended. Please refer to Section 8.3, Early Reflections, beginning on page 22, for further information.

Corner Treatment

It is important to control the first reflections of low frequency sound, which normally occur at the comers behind the loudspeakers. These reflections can cause significant distortions in phase and amplitude, resulting in muddy bass definition and smeared bass transients. Placing DAAD’s (available from Acustica Aplicata) at the room comers can significantly control these bass colorations and restore the quickness of bass transients.

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Contents Page Page Table of Contents Page Introduction Contents Unpacking InstructionsIntroduction Opening the Crate Orientation of the Felt Anti-Diffraction Mask Installing the GrillesReplacing Grille Pins Page Connecting the Speaker to the Amplifier Wiring InstructionsBreak-in Period Grille Assemblies Speaker Placement and SymmetryMaximizing Performance Break-inApex Couplers Toe-inCorner Treatment First Reflection PointsCabinet Care of Your Avalon LoudspeakersWarranty Statement WarrantyPage Introduction Room Acoustics and Speaker PositionAn Optical Analogy Standing Waves Flutter Echo Early ReflectionsAvoiding Early Reflections Page Bass reinforcement Page Summary of Recommendations Speaker Placement Listening Room Example Sensitivity to Time-Related Information Accuracy of Bass ReproductionAnechoic Frequency Response vs. In-Room Frequency Response RationaleCorrelation with Amplifier Measurements Measurements of Audio EquipmentDesigning for Accurate Bass Reproduction Loudspeaker MeasurementsListening Qualities Frequency Response EffectsListening for Size Distortions Transient Response Effects ConclusionFeatures Specifications