Avalon-acoustics AVALON INDRA Manuel d'utilisateur

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10 3 Wiring Instructions Introduction The crossover is housed in a sealed, non-accessible chamber in the bottom of the speaker cabinet, to minimize t

11 4 Break-in Period Your new AVALON ACOUSTICS loudspeakers have an initial break-in period. They will not perform to their full sonic potential

12 5 Maximizing Performance These details are imperative to obtaining optimum results from your AVALON ACOUSTICS loudspeakers. Break-in Th

13 Toe-In Adjusting the toe-in angle of the speakers is useful in tailoring the sound to best match the characteristics of your system an

14 First Reflection Points Since the ear/brain system tends to integrate the sounds arriving within a 10 millisecond time window, it is important to

15 6 Care of Your Loudspeakers Cabinet (Hardwood Finish) AVALON ACOUSTICS’ hardwood finished loudspeakers are supplied with a special polish

16 7 Warranty Your AVALON ACOUSTICS loudspeakers are warranted to the original, registered purchaser against defects in workmanship and materials for

17 Warranty Statement 1. AVALON ACOUSTICS warrants the materials, workmanship, and proper functioning of this product for a period of three ye

18 6. The above warranty is the sole warranty given by AVALON ACOUSTICS, and is in lieu of all other warranties. All implied warranties, i

19 8 Room Acoustics and Speaker Position Introduction The listening room forms the final link of the playback system, as important as any other com

Table of Contents 1 Introduction ...

20 An Optical Analogy Let us use a visual analogy to aid our understanding of acoustics. Imagine that you are in a room that is li

21 8.1 Standing Waves The parallel surfaces of most listening rooms can lead to a potential problem in the low frequencies. A sound wave can

22 8.2 Flutter Echo These parallel, reflective surfaces can also produce a different audible problem. If there is little absorption at highe

23 8.3 Early Reflections Another situation that can reduce the subjective quality of reproduced sound is the presence of early reflections. By

24 Avoiding Early Reflections The speed of sound is approximately one foot (30 cm) per millisecond. Therefore, to preserve the natural

25 Since the floor is within 5 feet of the speaker, it is best to have a carpeted floor to absorb floor reflections. A thick, dense carpet and

26 8.4 Bass reinforcement By bass reinforcement, we mean the effect of the room boundaries on the propagation of sound. It is widely kn

27 By properly selecting the distances to each surface, we can extend the in-room bass response of the speaker much d

28 Conversely, improper placement of the loudspeakers can result in uneven frequency response. This results in diminished bass quali

29 There are typically three reflective surfaces near each speaker: the floor, the rear wall, and the side wall. Each of

9 Accuracy of Bass Reproduction ... 33 Introduction ...

30 8.5 Summary of Recommendations Now that we have looked at some of the common problems of listening rooms, as well as their cures,

31 Speaker Placement Although your AVALON ACOUSTICS loudspeakers may be placed in a wide variety of positions relative to the walls of the r

32 8.6 A Listening Room Example In order to make these points more clear, an example of a room layout is given in Figure 8.9, illustrat

33 9 Accuracy of Bass Reproduction Introduction We have all had the experience of listening to speakers with poor bass quality. Perhaps

34 9.1 Sensitivity to Time-Related Information It is widely known that the human ear/brain system is extremely sensitive to time-related

35 9.2 Rationale There is an old saying, "There's no such thing as a free lunch." There are many trade-offs in speaker design, as

36 9.3 Measurements of Audio Equipment It should be recognized that measurements are not the final arbiter of sound quality of audio components.

37 Loudspeaker Measurements Returning to loudspeakers, a similar situation has developed. Although nobody listens to music in an anechoic cham

38 Designing for Accurate Bass Reproduction How, then, does one arrive at the goal of a loudspeaker that provides tonal accuracy in the listening room

39 9.4 Listening Qualities We have seen how many speaker systems store resonant bass energy, resulting in ringing and poor transient

4 1 Introduction Congratulations on your purchase of AVALON INDRA, one of the most technologically advanced high-energy transducers ever

40 Transient Response Effects A speaker with poor transient response will store energy, releasing it after the initial musical transient has passed

41 9.4 Conclusion Most loudspeakers have been designed to perform well in the frequency domain when measured in an anechoic test cha

42 10 Features  Advanced ultra-light weight ceramic and Nomex/Kevlar driver diaphragm materials minimize energy storage and time-domain dist

43 11 Specifications Driver Complement (1)1” Concave Ceramic NeoDymium Tweeter

44 12 Notes

5 2 Unpacking Instructions Introduction Your AVALON ACOUSTICS loudspeakers were shipped in a heavy-duty crate to ensure their safe arrival.

6 2.1 Opening the Crate The crate features a one-piece top assembly which is fastened to the crate bottom with screws around the lower peri

7 2.2 Installing the Grilles The grille assemblies are behind a panel on the outside of the speaker crate. Remove the screws securing the panel,

8 2.3 Replacing Grille Pins The grille pins installed on the grille assemblies are fragile and can be easily damaged. Should any of t

9 4. Carefully pull the grille cloth away from the frame mounting hole. The mounting hole must be clear of all obstacles during pin in