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Avalon Acoustics Sentinel manual

Models: Sentinel

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Specifications Crate and Box Placement for Unpacking Warranty Carefully lift each upper speaker cabinet by the small overhang at the base, and place it directly on top of the lower speaker cabinet, with the set- up blocks between them. Then gently slide the upper cabinet slightly forward to expose the wiring tubes in the lower cabinet See Figure Set the Master Gain on the subwoofer amplifier see .1 to match the output level of your main amplifier. This adjustment is both equipment and room dependent and should be tuned by ear while performing careful listening tests. Consult your dealer should you need assistance As frequency increases and wavelength becomes more similar to the distance to the boundary, the phase difference between original and reflected waves increases, and the air coupling effect is diminished. In particular, when the wavelength equals about four times the distance to the boundary, the reflected wave is antiphase to the original wave, resulting in a cancellation dip in the output. At frequencies above this level, the effect becomes less significant and creates similar but smaller variations in output. Figures 9.4 and 9.5 illustrate these concepts How to 13Features

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Avalon Acoustics Sentinel manual

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Manual 67 pages 20.58 Kb

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Contents

Handcrafted by Musical MasterpiecesSerial Numbers Page Table of Contents 9 Room Acoustics and Speaker Position 1 Introduction Overview1.1 Low Noise Floor 1.2 Coherent Energy Transfer 1.3 The Active Reference System Introduction Contents2 Unpacking Instructions 2.1 Room Preparation and Verification 2.2 Crate and Box Placement for Unpacking 2.3 Opening the Crates To unpack the upper speaker cabinets, remove the screws and lift the upper portion of the crate straight up this will require two people. Carefully lift the cabinets by the small overhang at the base. See Figure 2.3 Opening the Sub Amplifier Crates Removing Apex‘ Couplers from Set-upBlocks 3 System Set-upPreparation Left / Right Channel Matching 3.1 Lower Speaker Cabinet Set-up 3.2 Upper Speaker Cabinet Set-up 5.Carefully lift each upper speaker cabinet by the small overhang at the base, and place it directly on top of the lower speaker cabinet, with the set- up blocks between them. Then gently slide the upper cabinet slightly forward to expose the wiring tubes in the lower cabinet See Figure ‘Coupler into its receiving socket 3.3 Crossover Cabinet Set-up 3.4 The Felt Anti-DiffractionMask Orientation of the upper Felt Mask3.5 Sub Amplifier Set-up Introduction 4 Wiring InstructionsDo NOT over-tightenthe screws 4.1 Wiring and Field Interactions Inductive field effects4.2Connecting Upper Speaker Cabinet to Crossover Do NOT over-tightenthe binding posts4.3Connecting Speaker Cable to the Crossover Do NOT over-tightenthe binding posts4.4 Connect Speaker Cable to your Amplifier 4.4Connecting Subwoofer to the Sub Amplifier 2.Two outputs at the preamplifier 4.5 Connecting Preamplifier to the Amplifiers1. Interconnect Y-cableat the preamplifier 3. Loop-Outfrom the Subwoofer Amplifier5 Break-inPeriod Room Compensation 6 Subwoofer AmplifierDesign Principle 1.Set the Master Gain on the subwoofer amplifier see Figure 6.1 to match the output level of your main amplifier. This adjustment is both equipment and room dependent and should be tuned by ear while performing careful listening tests. Consult your dealer should you need assistance Separate Left / Right Amplifiers 7 Maximizing PerformanceBreak-in Felt Anti-diffractionMasksApex‘ Couplers Room Treatment and System / Listener PositionToe-In First Reflection Points Corner TreatmentCrossover Cabinet 8 Care of Your Avalon LoudspeakersCabinet Drivers9 Warranty In the Event of a ProblemWarranty Statement Page 10 Room Acoustics / Speaker Position IntroductionAn Optical Analogy Basic Room Acoustics10.1 Standing Waves 10.2 Flutter Echo 10.3 Early Reflections Avoiding Early Reflections It is not necessary to acoustically treat the entire room to achieve good results. Strategic treatment of specific locations can realize considerable benefits. Remember that when sound waves reflect from a flat surface, the angle of reflection is equal to the angle of incidence, just as a mirror reflects light waves. Therefore, the most important location for sound absorbing material is the point where the sound waves reflect to the listener see Figure Low Frequency Reflections 10.4 Bass reinforcement As frequency increases and wavelength becomes more similar to the distance to the boundary, the phase difference between original and reflected waves increases, and the air coupling effect is diminished. In particular, when the wavelength equals about four times the distance to the boundary, the reflected wave is antiphase to the original wave, resulting in a cancellation dip in the output. At frequencies above this level, the effect becomes less significant and creates similar but smaller variations in output. Figures 9.4 and 9.5 illustrate these concepts Page 10.5 Summary of Recommendations Flutter Echo and Standing WavesSpeaker Placement Early Reflections10.6 A Listening Room Example Time Alignment 11 Listening PositionPath Length Symmetry Summary 12 Accuracy of Bass Reproduction Introduction12.1 Sensitivity to Time-RelatedInformation Fast Bass12.2 Measurements of Audio Equipment A Correlation with Amplifier MeasurementsLoudspeaker Measurements Designing for Accurate Bass Reproduction Listening for Size Distortions 12.3 Listening QualitiesFrequency Response Effects Transient Response Effects 12.4 Active Subwoofer System Active Control of Bass Energy13Features Subwoofer Amplifier 14 SpecificationsLoudspeaker