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Echo Diastasis PH-79 Phono Amplifier

Finn de Kroon by Finn de Kroon
March 7, 2025
Reading Time: 3 mins read
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Echo-Diastasis-PH-79-Phono-Amplifier

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Phono preamplifiers, or phono amps, are among the most challenging audio devices to design due to the multitude of requirements they must fulfill. The Echo Diastasis PH-79 stands out in this complex landscape by successfully balancing high gain, low noise, accuracy in the RIAA curve, low distortion, and a high overload margin. All these features come together to ensure that the music flows naturally, preserving the rich musical characteristics of recordings, including analysis, transparency, spatial depiction, harmonic richness, dynamics, and clear low-frequency descriptions.

Innovative Design and Topology

Over the years, various topologies for phono preamplifiers have emerged, each with its own set of advantages and disadvantages. The PH-79 employs an original design that is the culmination of extensive research and development. Traditional passive phono preamplifiers often require additional gain to offset losses from passive components, leading to increased noise and distortion. In contrast, the PH-79 Reference utilizes two active stages to implement the RIAA curve without global feedback. This approach ensures that the gain at specific frequencies is optimized, providing a more accurate representation of the audio signal.

Echo-Diastasis-PH-79-Phono-Amplifier-1

The design also features a buffer stage capable of driving even the most challenging loads, ensuring compatibility with a wide range of audio systems. To combat RF noise from standard wall power, the power supply integrates specially designed EI core transformers. The use of selected semiconductors, integrated circuits, and high-quality passive components further enhances the circuit’s performance. The meticulous process of matching component values and conducting repeated measurements results in remarkable accuracy in the RIAA curve implementation, with a typical yield of only one in five components making the cut.

Echo-Diastasis-PH-79-Phono-Amplifier-3

Enhanced Features of the PH-79 Reference

Building on the success of its predecessor, the PH-79 Reference introduces several key improvements:

  • Reinforced, Stiffer Frame: Enhances durability and reduces resonance.
  • Redesigned Front Panel: Features user-friendly switches for easier operation.
  • Double Power Supply Capacity: Provides increased headroom for demanding audio signals.
  • Vibration Isolation: Supported on aluminum legs to minimize interference from vibrations.
  • Dual Standby Inputs: Ensures the device remains on and ready to play at all times.
  • Shorter Signal Path: A redesigned PCB for improved signal integrity.
  • High-Quality OCC Wiring: Internal low-capacity wiring for superior audio fidelity.
  • Rigorous Component Control: Continuous measurements during production to ensure quality.
  • New Output Devices: Capable of delivering more current, allowing for longer cable runs without loss of quality.

Echo-Diastasis-PH-79-Phono-Amplifier-2

A Commitment to Audio Excellence

At Echo Diastasis, the philosophy is clear: if they are to introduce another phono preamp into the market, it must truly stand out. The PH-79 Reference embodies this commitment, pushing the boundaries of music playback further than ever before. It is designed to extract even the most subtle details from the grooves of vinyl records, creating a vast and immersive soundstage.

The result is a listening experience that is both musically engaging and precise. Echo Diastasis confidently asserts that the PH-79 Reference is among the best phono preamplifiers available, regardless of price. Ultimately, the proof lies in the listening experience; for those who seek audio perfection, the Echo Diastasis PH-79 Reference is a worthy contender that invites you to hear the difference for yourself.

Tags: Echo DiastasisEcho Diastasis PH-79Phono Amplifier
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Finn de Kroon

Finn de Kroon

I made short movies with my stuffed animals as a kid, since then I knew from a young age I wanted to be a videographer. My parents always said I had a great eye for video/photo, so I made my job out of it. Now I make professional corporate video's. I love to learn all about new gadgets and electronics that come to the market, that's why I write/edit for "Best Of High End".

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