Avalon Acoustics OPUS Ceramique Loudspeaker - Manual (Page 3)

Table of Contents
1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Unpacking Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Introduction .................................................................................................6
Contents......................................................................................................6
2.1 Opening the Crate ...............................................................................................7
2.2 Installing the Grilles ............................................................................................8
Orientation of the Felt Anti-Diffraction Mask .....................................................8
2.3 Replacing Grille Pins ............................................................................................9
3 Wiring Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Introduction .................................................................................................11
Connecting the Speaker to the Amplifier............................................................11
4 Break-in Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5 Maximizing Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Break-in ......................................................................................................14
Grille Assemblies..........................................................................................14
Speaker Placement and Symmetry....................................................................14
Toe-In.........................................................................................................15
Apex™ Couplers ..........................................................................................15
First Reflection Points....................................................................................16
Corner Treatment..........................................................................................16
6 Care of Your Loudspeakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Cabinet (Hardwood Finish) .............................................................................17
Grille Assembly............................................................................................17
Drivers........................................................................................................17
7 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
In the Event of a Problem ...............................................................................18
Warranty Statement.......................................................................................19
8 Room Acoustics and Speaker Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Introduction .................................................................................................21
An Optical Analogy.......................................................................................22
Basic Room Acoustics ...................................................................................22
8.1 Standing Waves ..................................................................................................23
8.2 Flutter Echo .......................................................................................................24
8.3 Early Reflections.................................................................................................25
Avoiding Early Reflections .............................................................................26
8.4 Bass reinforcement ..............................................................................................28
8.5 Summary of Recommendations..............................................................................31
Flutter Echo and Standing Waves.....................................................................31
Speaker Placement ........................................................................................32
Early Reflections ..........................................................................................32
8.6 A Listening Room Example ..................................................................................33