Avalon Acoustics Sentinel manual Early Reflections

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10.3 Early Reflections

Another situation that can reduce the subjective quality of reproduced sound is the presence of early reflections. By early reflections, we are referring to reflected sound waves that reach the listener within 10 to 20 milliseconds of the direct signal from the loudspeaker.

When a reflected sound reaches the listener more than 40 milliseconds later than the direct sound, the reflection is heard as a discrete echo. However, if the reflected sound arrives within around 20 milliseconds of the direct sound, the ear/brain system integrates the two sounds so that only one sound is heard. This integration is done in such a way that spatial information is preserved, providing an acoustical "picture" of the physical space that created the reflections.

However, the source recording also contains ambient information that portrays the original recording site. Early reflections in the listening room will tend to obscure the ambient information in the recording, leading to a loss of dimensionality or spaciousness. Secondary arrivals within the first 10 milliseconds are especially problematic, becoming less troublesome as the arrival time lengthens to 20 milliseconds or so.

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Contents Musical Masterpieces Page Table of Contents Introduction Listening Position Overview IntroductionLow Noise Floor Coherent Energy Transfer Active Reference System Contents Unpacking InstructionsIntroduction Room Preparation and Verification Room set-up for unpacking Crate and Box Placement for UnpackingTo unpack the crossover cabinets Opening the CratesTo unpack the upper speaker cabinets Opening the Sub Amplifier Crates System Set-up PreparationRemoving Apex‘ Couplers from Set-up Blocks Left / Right Channel Matching Lower Speaker Cabinet Set-up Installation of Apex‘ couplersUpper Speaker Cabinet Set-up Page Page Crossover Cabinet Set-up Proper placement of crossover cabinet behind speakerOrientation of the upper Felt Mask Felt Anti-Diffraction MaskSub Amplifier Set-up Do not over-tighten the screws Wiring InstructionsInductive field effects Wiring and Field InteractionsDo not over-tighten the binding posts Connecting Upper Speaker Cabinet to CrossoverConnecting Speaker Cable to the Crossover Connect Speaker Cable to your Amplifier Connecting Subwoofer to the Sub Amplifier Connecting Preamplifier to the Amplifiers Interconnect Y-cable at the preamplifierTwo outputs at the preamplifier Break-in Period Subwoofer Amplifier Design PrincipleRoom Compensation Master Maximizing Performance Separate Left / Right AmplifiersFelt Anti-diffraction Masks Room Treatment and System / Listener Position Toe-InApex‘ Couplers Corner Treatment First Reflection PointsCabinet Care of Your Avalon LoudspeakersCrossover Cabinet DriversEvent of a Problem WarrantyWarranty Statement Page Room Acoustics / Speaker Position Basic Room Acoustics An Optical AnalogyStanding Waves Flutter Echo Early Reflections Avoiding Early Reflections Angle Angle Y Reflected Sound Direct Sound Low Frequency Reflections Bass reinforcement 100 200 500 Page Flutter Echo and Standing Waves Summary of RecommendationsEarly Reflections Speaker PlacementListening Room Example Listening Position Path Length SymmetryTime Alignment Summary Accuracy of Bass Reproduction Fast Bass Sensitivity to Time-Related InformationCorrelation with Amplifier Measurements Measurements of Audio EquipmentLoudspeaker Measurements Designing for Accurate Bass Reproduction Listening Qualities Frequency Response EffectsListening for Size Distortions Transient Response Effects Active Subwoofer System Anechoic Frequency Response vs. In-Room Frequency ResponseActive Control of Bass Energy Features Specifications LoudspeakerSubwoofer Amplifier

Sentinel specifications

Avalon Acoustics Sentinel represents a pinnacle in high-fidelity loudspeakers, designed for audiophiles who demand exceptional sound quality and elegant design. Known for their commitment to meticulous craftsmanship and innovative technology, Avalon Acoustics continues to push the boundaries of acoustic performance with the Sentinel model.

One of the standout features of the Sentinel is its unique three-way design. This configuration allows for precise sound reproduction across the entire audio spectrum, delivering rich bass, articulate midrange, and sparkling highs. The speaker utilizes proprietary drivers that have been engineered to minimize distortion while maximizing dynamic range and sensitivity. This ensures that every note is rendered with clarity and precision, making it ideal for any listening environment.

The cabinet design of the Sentinel is another aspect that underscores Avalon's commitment to excellence. Constructed from carefully selected hardwoods and finished to perfection, the enclosure not only enhances aesthetic appeal but also plays a critical role in acoustic performance. Its solid build effectively reduces resonance and undesirable vibrations, allowing the drivers to perform at their best.

In terms of technology, the Sentinel incorporates advanced crossover networks. These networks are designed to ensure seamless transition between drivers, providing a cohesive soundstage. By using high-quality components, the crossover systems significantly improve the overall performance, ensuring that listeners enjoy a balanced and natural tonal quality.

Moreover, the Sentinel features adjustable bass ports, allowing users to tailor the speaker's performance to fit their specific room acoustics. This flexibility helps to optimize the listening experience, regardless of the environment. The speakers also include easy-to-use bi-wiring and bi-amping capabilities, enabling audiophiles to customize their setup for optimal sound quality.

Finally, the visual appeal of Avalon Acoustics Sentinel cannot be understated. With its sleek lines and contemporary design, it is a statement piece that complements any décor. Available in various finishes, the Sentinel seamlessly blends performance with style, catering to both auditory and aesthetic sensibilities.

In summary, Avalon Acoustics Sentinel stands out as an exceptional loudspeaker that combines advanced technology, exquisite craftsmanship, and customizable features. Its three-way design, high-quality drivers, and adjustable features make it a top contender for those seeking unparalleled sound quality in a luxurious package.
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