Feliks Audio is a company that specializes in high-end audio equipment, particularly tube amplifiers and headphone amplifiers.

 Feliks Audio


In the world of high-end audio, innovation is a continuous journey. The latest milestone in this journey is the introduction of the HiFi Rose RS130, a network audio player that has been creating waves among audio enthusiasts and industry experts alike. This flagship product from the Korean high-end audio manufacturer HiFi Rose represents a significant leap forward in network audio technology, combining cutting-edge features with luxurious design.

**Unrivaled Technological Excellence**

The RS130 stands out with its impressive array of technological advancements. Key among these is the use of Fiber Optic Ethernet and USB connections, which effectively isolate network digital noise. This ensures that the sound reaching the DAC is flawless, devoid of any interference typically caused by network equipment. Additionally, the player boasts an ultra-high-precision OCXO (Oven Controlled Crystal Oscillators) clock, which guarantees an exceptionally precise digital audio signal across all digital outputs.

An overbuilt linear power supply featuring high capacity supercapacitors, coupled with a specially processed all-aluminum chassis, virtually eliminates all vibrations. The player also includes an internal NVMe SSD memory caching system for stable playback, mitigating issues associated with network instabilities.

**A Blend of Luxury and User-Friendly Design**

Aesthetically, the RS130 is a masterpiece. It features a 15.4-inch wide full-color touchscreen, offering a high-resolution interface that runs the entire width of the front panel. Its user-friendly interface, based on a heavily customized Android 7.1 OS, allows for easy navigation and control. The streaming protocols supported include AirPlay, DNLA, Bluetooth, Spotify Connect, and Roon Ready. Furthermore, the player is equipped with onboard apps such as Apple Music, Tidal, Qobuz, and Spotify, all accessible via the ROSE Connect controller app.

**Enhancing the Audiophile Experience**

The RS130 is not just about technological prowess; it's about enhancing the overall listening experience. Its design and features reflect a deep understanding of audiophiles' needs. From its Fiber Optic Ethernet that blocks physical noise sources, to the specialized all-aluminum chassis that eliminates vibrations, every aspect of the RS130 is crafted to deliver pure, unadulterated sound.

**Setting New Standards**

The HiFi Rose RS130 is more than just a network player; it's a statement of luxury, innovation, and unparalleled audio performance. With its introduction, HiFi Rose has set a new benchmark in the world of high-end audio, offering an experience that transcends the ordinary. As the brand continues to refine its products and push the boundaries of audio technology, the RS130 stands as a testament to what can be achieved when luxury meets technological innovation.

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 HiFi Rose RS130: A New Benchmark in Network Audio Players

Explore the HiFi Rose RS130: a luxurious, high-end network audio player with advanced Fiber Optic tech, precision OCXO clock, and a user-friendly interface

In the realm of high-end audio equipment, Lyra's latest offering, the Erodion EVO, is a significant development. This Moving Coil Step-Up Interface, tailored primarily for Lyra cartridges, is also adept at working with other low-impedance cartridges within the 2 to 10 ohms range. Its compatibility with Lyra's SL MC cartridges, including the Kleos SL, Etna Lambda SL, and Atlas Lambda SL, is particularly noteworthy.

The Erodion EVO stands out for its ability to reduce noise and minimize electronic artifacts more effectively than many phono stages. This feature ensures an elevated audio experience, often surpassing the performance of well-regarded high-gain, low-noise phono stages. Its wider bandwidth and dynamic range are other remarkable aspects, delivering a sonic impact that bridges the gap between an active head amp and a conventional step-up transformer.

Equipped with a 26dB gain, the Erodion EVO adeptly increases the signal voltage and output impedance of low-output, low-impedance MC cartridges, making it a suitable match for MM-compatible phono inputs of preamplifiers and phono stages with around 47 kohms load. This makes it versatile for a range of audio setups.

An integral part of the Erodion EVO is the Lyra-designed-and-made low-capacitance PhonoPipe output cable, which measures approximately 60 cm (2 ft.). This addition further enhances its performance. Moreover, the device offers two switchable grounding positions, with Position 2 (floating ground) being recommended for optimal performance.

In terms of its physical attributes, the Erodion EVO has a compact and sturdy build. It features three stainless steel spikes for stability and has a net weight of 2430 grams (5.2 lbs). Despite its technical sophistication, the device does not contain or require any electrical power supply, emphasizing its user-friendly nature and ease of integration into existing audio setups.

The release of the Erodion EVO is a testament to Lyra's commitment to advancing audio technology, offering audiophiles a product that enhances their listening experience with minimal electronic interference and maximal audio fidelity. For those interested in exploring this latest innovation in the audiophile world, visiting Lyra's official website or contacting their customer support would provide more detailed information and technical specifics. The Erodion EVO is priced at $6,500, reflecting its position in the high-end audio equipment market.

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Lyra Unveils Erodion EVO: A High-Fidelity Moving Coil Step-Up Interface with Exceptional Noise Reduction Capabilities

Experience unmatched 26dB gain with Lyra's Erodion EVO, a game-changer in audio fidelity.

Understanding room acoustics starts with grasping the essential principles of sound itself. Whether you're a sound engineer, an audiophile, or just someone interested in learning more about sound, this article is your go-to guide. In the following chapters, we will delve into what sound waves are, what frequency means, and how amplitude impacts what you hear. 

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## The Nature of Sound Waves

### What is Sound?

#### The Mechanical Nature of Sound

Sound is essentially a kind of wave that moves through a medium, like air, water, or even solid materials. Imagine you're plucking a guitar string. When the string moves, it starts to shake or vibrate. This vibration causes the air around the string to move, and these moving air particles then cause the particles next to them to move. This domino effect creates a ripple in the air, almost like how dropping a stone in water creates ripples. This ripple in the air is what we know as a sound wave.

#### Anatomy of a Sound Wave

**Compressions and Rarefactions**

A sound wave has parts where the air particles are close together and other parts where they're spread out. When the particles are close together, that's what we call "compression," which is an area of high pressure. On the flip side, when the particles are far apart, that's called "rarefaction," an area of low pressure. So, a sound wave is essentially a series of these compressions and rarefactions moving through the air.

**Wavelength, Frequency, and Amplitude**

-   **Wavelength**: When you look at a sound wave, you'll see that it has peaks and valleys. The distance from one peak to the next (or one valley to the next) is what we call the "wavelength."
-   **Frequency**: This is how many peaks (or valleys) pass by a specific point in a given amount of time, usually one second. Frequency is what determines the pitch of the sound; the higher the frequency, the higher the pitch.
-   **Amplitude**: This describes how "tall" the peaks in the wave are, or in other words, how far the particles in the air are moving back and forth. The amplitude determines how loud the sound is; bigger amplitude means a louder sound.

#### Complex Waveforms and Timbre

Real-world sounds are usually not simple; they are complex mixtures of many waves. For example, when you hear a note played on a piano and the same note played on a guitar, they sound different. This quality of sound that allows you to distinguish between different instruments playing the same note is called "timbre." Timbre is shaped by a combination of many different sound waves that are all mixed together.

#### Phase and Interference

When two sound waves meet, they can either add up to make a louder sound or cancel each other out to make a softer sound. This is known as "interference." How this happens depends on the "phase" of the waves, which is essentially the timing of their peaks and valleys relative to each other. If two waves are in sync, they'll make a louder sound, and if they're out of sync, they can cancel each other out.

In summary, understanding the nature of sound waves, their properties, and how they interact with each other is the foundation for diving into the complex world of room acoustics. With these basics, you'll be better equipped to understand the technicalities involved in sound engineering and audio system setup.

## Frequency — The Pitch of Sound

### Understanding Frequency

When you hear the shrill sound of a whistle or the deep rumble of a drum, what you're actually detecting are differences in frequency. Think of frequency as the "speed" of the sound wave. Measured in units called Hertz (Hz), frequency determines whether a sound is high-pitched or low-pitched. When a sound wave has many cycles passing by a point in just one second, we say it has a high frequency, and it sounds higher to our ears. On the other hand, fewer cycles per second lead to a low frequency and a deeper sound.

#### The Role of Frequency in Music and Speech

In music, the concept of frequency is essential for distinguishing between different musical notes. When you play a middle C on a piano, you are essentially creating a sound wave with a specific frequency that our ears and brain interpret as that particular note. In speech, variations in frequency give rise to the different tones and pitches that make voices unique.

### Harmonics and Overtones

#### What Are They?

You might think that when you play a musical note, you're hearing just one frequency, but that's rarely the case. Most of the time, you're hearing a main frequency (known as the fundamental frequency) along with several other higher frequencies known as harmonics or overtones.

#### How Do They Affect Sound?

These harmonics are actually whole-number multiples of the fundamental frequency. So if your fundamental frequency is, say, 100 Hz, you might also have harmonics at 200 Hz, 300 Hz, 400 Hz, and so on. These harmonics give the sound its own unique "color" or "timbre," making a piano sound different from a flute even when they play the same note.

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## Amplitude — The Loudness Factor

### What is Amplitude?

If frequency is about pitch, amplitude is about volume. Amplitude tells us how "big" a sound wave is, meaning how much the air particles are moving back and forth as the wave passes through. A big, or "tall," wave will sound loud to us, while a small, or "short," wave will sound quiet.

#### The Real-World Implications of Amplitude

Amplitude has significant implications in various fields. In sound engineering, managing amplitude is crucial for balancing sound levels in recording or live performance settings. For audiophiles and those interested in Hi-Fi equipment, understanding amplitude is key to optimizing the listening experience, from setting volume levels to choosing the right equipment.

### The Decibel Scale

#### Why Do We Need It?

Our ears can pick up a remarkably wide range of sounds, from the faint rustle of leaves to the roar of a jet engine. To make sense of this enormous range, we use a special logarithmic scale called the decibel (dB) scale.

#### How Does It Work?

The decibel scale allows us to describe very quiet and very loud sounds in a way that's easier to understand and quantify. On this scale, a whisper might measure around 20 to 30 dB, while a rock concert could exceed 120 dB. The decibel scale is not linear; a sound that is 20 dB is not twice as loud as a sound that is 10 dB. Instead, each increase of 10 dB represents a tenfold increase in intensity, making the sound perceptually about twice as loud.

By understanding both frequency and amplitude, and how they are measured and described, you are well on your way to mastering the intricacies of sound and acoustics. Whether you're setting up a sound system, optimizing a recording studio, or simply deepening your understanding of sound, these concepts are foundational.

## The Relationship Between Frequency and Amplitude in Room Acoustics

### Resonance and Room Modes

Ever wondered why certain notes seem to "hang in the air" more when played in specific rooms? This phenomenon is called "resonance," where certain frequencies interact with the dimensions of the room to amplify themselves. This creates what are known as "room modes" and can significantly impact how we perceive sound in that space. For example, a small room might amplify lower frequencies, making a simple speech sound more "boomy" than it actually is.

#### Why Should You Care About Room Modes?

Room modes can either be your friend or your enemy. They can add fullness to a sound, but they can also create issues like "muddiness," where certain frequencies become overwhelming, masking other sonic details.

### Absorption and Reflection

#### How Do They Work?

When sound waves hit surfaces, they can either be absorbed or reflected back into the room. Soft materials, like carpets and drapes, absorb sound, particularly higher frequencies. Hard surfaces like glass or wood reflect sound waves. Lower frequencies, the kind that can make a room feel "boomy," are particularly hard to absorb and are often reflected.

#### Impact on Room Acoustics

The balance between absorbed and reflected sound defines the acoustic signature of a room. Rooms with too much absorption may sound "dead," lacking liveliness. Conversely, rooms with too much reflection may suffer from echo and poor clarity.

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## Practical Implications for Sound Engineers and Audiophiles

### Equalization and Acoustic Treatment

#### The Tools of the Trade

Armed with an understanding of frequency and amplitude, sound engineers and audiophiles can work wonders. Acoustic treatments like panels, diffusers, and bass traps can be strategically deployed to improve sound quality. Equalizers can also help by adjusting the amplitude of specific frequency bands to achieve a balanced sound.

#### Tailoring the Acoustic Environment

By combining various forms of acoustic treatment and electronic equalization, you can tailor an environment to suit any auditory task—from the critical listening required in a mixing studio to the broad soundstages desired in home theaters.

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## Final Thoughts

Understanding the key principles of sound waves, frequency, and amplitude is invaluable for anyone venturing into the realm of audio. Whether you're an aspiring sound engineer, a dedicated audiophile, or someone just interested in the science of sound, this foundational knowledge equips you to make informed decisions and optimizations.

As we delve deeper into these topics, we don't just become more discerning listeners; we evolve into skilled architects of sound. Our mastery over the acoustic elements allows us to shape our auditory experiences, transforming the simple act of listening into an art form.

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Fundamental Concepts: Sound Waves, Frequency, Amplitude

To fully grasp the complexity of room acoustics, one must understand the basic principles of sound. Sound travels in waves, characterized by their frequency and amplitude. Frequency refers to the pitch of the sound, while amplitude denotes its loudness.

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Feliks Audio Showcases Groundbreaking Amplifiers at Munich Audio Show

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Fundamental Concepts: Sound Waves, Frequency, Amplitude