Avalon Acoustics OPUS Ceramique Loudspeaker manual Loudspeaker Measurements

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Loudspeaker Measurements

Returning to loudspeakers, a similar situation has developed. Although nobody listens to music in an anechoic chamber, loudspeaker measurements are commonly performed in them.3 Although various proposals have been made for performing low frequency measurements in a more realistic setting, there has been no agreement as to what that setting should be. Loudspeakers continue to be measured in a test chamber that is equivalent to the absence of any room at all.

There is a developing appreciation that this traditionally performed measurement is not an accurate predictor of the performance actually attained in the listener's room. Certainly, in-room frequency response is more important than anechoic response in determining a speaker's tonal accuracy. Placement of the speaker within a room will cause changes in the frequency response compared to the anechoic condition.4 At lower frequencies, the speaker's output is modified by the acoustic loading presented by the walls and floor. However, when making measurements, it is difficult to separate the effects of a room's bass reinforcement from standing waves and other resonances associated with that room.

3Since an anechoic chamber which performs accurately to low frequencies is extremely large and expensive, other measurement methods are also commonly used. These include near-field measurements, when the microphone is extremely close to the driver, and half-space measurements, when the speaker under test is buried with its front baffle flush with the ground, facing upwards. Both of these methods are equivalent to anechoic measurements below the frequency at which the speaker baffle appreciably changes the acoustic load to the woofer, typically between 100 and 200 Hz. Note that these conditions are also non-representative of an actual listening situation.

4Since this discussion is concerned with the reproduction of low frequencies, we will not delve deeply into the high-frequency variations between the anechoic response and the in-room response of a loudspeaker. Briefly, the interaction of the dispersion pattern of the speaker with the reflective surfaces in the room (and the variation of both with frequency) creates an in-room frequency response that may vary markedly from the anechoic response.

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Contents Music al Master piec es Page Table of Contents Features Introduction Introduction ContentsUnpacking Instructions Opening the Crate To unpack the loudspeakersInstalling the Grilles Orientation of the Felt Anti-Diffraction MaskReplacing Grille Pins Insertion of new grille pin into installation toolPage Do not over-tighten the screws Wiring InstructionsConnecting the Speaker to the Amplifier From Amplifier Break-in Period Grille Assemblies Speaker Placement and SymmetryMaximizing Performance Toe-In Apex CouplersFirst Reflection Points Corner TreatmentCabinet Hardwood Finish Grille AssemblyCare of Your Loudspeakers DriversWarranty Event of a ProblemWarranty Statement Page Room AcousticsandSpeaker Position An Optical Analogy Basic Room AcousticsStanding Waves Flutter Echo Early Reflections Avoiding Early Reflections Angle X Angle Y Reflected Sound DirectSound Bass reinforcement 100 200 500 Page Summary of Recommendations Flutter Echo and Standing WavesSpeaker Placement Early ReflectionsListening Room Example Accuracy of Bass Reproduction Sensitivity to Time-Related Information Fast BassRationale Anechoic vs. In-Room Frequency ResponseMeasurements of Audio Equipment Correlation with Amplifier MeasurementsLoudspeaker Measurements Designing for Accurate Bass Reproduction Frequency Response Effects Listening for Size DistortionsTransient Response Effects Conclusion Features Specifications

OPUS Ceramique Loudspeaker specifications

Avalon Acoustics is renowned in the high-end audio industry, and their OPUS Ceramique Loudspeaker exemplifies their dedication to exceptional sound quality and innovative design. This speaker is a perfect blend of artistry and advanced engineering, making it a coveted choice among audiophiles.

One of the key features of the OPUS Ceramique is its sophisticated driver configuration. It utilizes a three-way design, which is engineered to deliver a full spectrum of sound with impressive clarity. The loudspeaker is equipped with a 10-inch ceramic bass driver capable of deep, powerful low frequencies, ensuring that every note resonates with depth. Complementing this are dual midrange drivers made from advanced ceramic materials, which provide rich and warm mid tones. Finally, for the highs, the OPUS employs a unique ribbon tweeter designed for exceptional detail and an extended frequency response, offering a natural and airy sound that brings music to life.

The cabinet design of the OPUS Ceramique is as remarkable as its internal components. It features a rigid construction that minimizes resonance and cabinet coloration, ensuring that the sound remains pure and true to the source. The elegant curves of the speaker not only enhance its aesthetic appeal but also contribute to better acoustic performance by optimizing the dispersion of sound waves.

Another prominent technology incorporated in the OPUS Ceramique is its advanced crossover network. The crossover is meticulously engineered to ensure a seamless transition between the drivers, allowing for coherent sound reproduction across all frequencies. This means that listeners can enjoy an immersive soundstage where instruments and vocals are clearly delineated, creating a more engaging listening experience.

In addition to its acoustic prowess, the OPUS Ceramique is designed with the audiophile in mind. It is highly customizable, with various finishes available to suit any decor. The attention to detail extends to every aspect of its construction, providing both aesthetic beauty and functional performance.

Overall, the Avalon Acoustics OPUS Ceramique Loudspeaker stands as a testament to the brand's commitment to delivering extraordinary sound and elegance. With its innovative technologies and exceptional build quality, it continues to be a sought-after choice for discerning music lovers seeking the ultimate audio experience. Whether used in a dedicated listening room or as part of a high-end home theater system, the OPUS Ceramique promises to elevate any audio experience to new heights.
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