Avalon Acoustics AVALON ASCENDANT manual

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By properly selecting the distances to each surface, we can extend the in-room bass response of the speaker much deeper than its anechoic response. Please see Figure 8.5. This is because the bass reinforcement provides a boost which is complementary to the bass roll-off that would be present in an anechoic chamber.

Figure 8.5 - Anechoic response, and in-room response with the speaker placed 4.6 feet from the rear wall, and 3.0 feet from the side wall. Note how the bass response is extended by the room reinforcement.

Conversely, improper placement of the loudspeakers can result in uneven frequency response. This results in diminished bass quality. Please refer to Figure 8.6.

Figure 8.6 - Uneven frequency response caused by improper placement of the speakers. In this case, the speaker is 2.0 feet from both the side and rear walls.

In order to take full advantage of the bass reinforcement to provide the most uniform and extended bass response, the anechoic response of the speaker must be known. The Ascendant is designed so that proper bass reinforcement occurs when the speaker is placed between two and five feet from one of the walls (side or rear), and between three and ten feet from the other wall.

The measurements are made from the wall to the center of the woofer cone. The exact distances are not overly critical, although the two distances should not be within about 20% of each other. For example, if the distance to the side wall is four feet, then the distance to the rear wall should be at least five feet.

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Contents Page Page Table of Contents Page Introduction Unpacking Instructions ContentsIntroduction 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 Maximizing Performance Speaker Placement and SymmetryBreak-in Grille AssembliesApex Couplers Toe-inCorner Treatment First Reflection PointsCabinet Care of Your Avalon LoudspeakersWarranty Statement WarrantyPage Introduction Room Acoustics and Speaker PositionAn Optical Analogy Standing Waves Early Reflections Flutter EchoAvoiding 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 MeasurementsFrequency Response Effects Listening QualitiesListening for Size Distortions Transient Response Effects ConclusionFeatures Specifications
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