Technology, Servo Advantage | Genesis Advanced Technologies S4/8

a b s o l u t e f i d e l i t y ™

The Technology

The Servo Advantage

Very few loudspeakers use servo drive, either because most designers think that it is too difficult to design, too expensive, or because of the extraordinary demands a servo system makes on the amplifier and the transducer. However, the Chief Scientist of Genesis, Arnie Nudell, first introduced the servo system in the legendary Infinity Servo Statik One in 1968(!) – so we know how to design and build servo systems.

The concept of our servo bass system is an easy one to understand: It employs an accelerometer as a sensor to constantly monitor the movement of the woofer cone, and instantaneously compares it to the input signal. This comparison circuit identifies any deviation from the ideal and instantaneously applies a corrective signal to compensate for the deviation; virtualy eliminating inherent woofer distortion.

As an example, when you have a high-impact, low-bass signal that starts and stops suddenly (for example a kick drum), the inertia of the woofer cone causes the cone to be slow to begin moving. Once the cone is in motion, the momentum of the cone causes it to keep moving - even after the output signal of the amplifier has stopped.

The sonic result is overhang, bloat, lack of tautness and definition, and a blurring of dynamic impact. With the servo system, the circuit senses that the woofer is not moving as fast as it should, and applies more current to make it move faster. When the signal stops, it detects that the woofer is still moving when it shouldn’t, and applies a counter- signal to cause the the woofer to stop faster and more effectively than normal circuitry would.

Thus, the servo-drive reduces distortion and improves transient response by making the woofer seem mass-less. Typical non-servo woofer systems have distortion levels that exceed 10% at even moderate levels. The Genesis servo bass system reduces this distortion to below one percent at almost any output level. Moreover, it drives the woofer to constant acceleration, which makes its frequency response nearly flat!

500W Class-D Switching Amplifier

The servo system places extraordinary demands on the amplifier because it uses enormous amounts of current to make the woofer follow the signal. This means that the amplifier used must deliver huge amounts of clean power.

S4/8 Owners Manual Ver 0.1

S4/8 specifications

Genesis Advanced Technologies has established itself as a frontrunner in high-performance audio equipment, and the S4/8 loudspeaker exemplifies this commitment to excellence. The S4/8 is a remarkable fusion of innovative technology and sophisticated design, aimed at delivering an unparalleled listening experience.

At the core of the S4/8 is its unique driver configuration, which incorporates advanced materials and engineering techniques. Each speaker features a proprietary ribbon tweeter that offers exceptional high-frequency response, ensuring clarity and detail across the most nuanced audio passages. Coupled with this, the midrange drivers employ advanced composite materials to minimize distortion while providing a rich, warm sound that brings life to vocals and instruments alike.

A standout feature of the S4/8 is its cabinet design, crafted from high-density MDF. This construction choice dramatically reduces resonance, allowing the speakers to produce a cleaner sound free from unwanted coloration. The enclosure is meticulously designed to optimize internal airflow, enhancing the bass response while maintaining tight control over the lower frequencies.

In terms of technology, Genesis Advanced Technologies has integrated a sophisticated crossover network within the S4/8, allowing for precise frequency distribution among the drivers. This results in a seamless integration of sound across all frequencies, ensuring that listeners enjoy a coherent soundstage. Additionally, the S4/8 supports bi-wiring and bi-amping configurations, giving audiophiles the flexibility to customize their setup for the best performance.

The aesthetic appeal of the S4/8 cannot be overlooked. Available in a variety of finishes, including real wood veneers, these speakers not only perform beautifully but also complement any audio setup visually. The elegant design, coupled with a robust build quality, makes the S4/8 a true statement piece.

Furthermore, the S4/8 is designed with user functionality in mind, featuring multiple input options and a straightforward setup process. This speaker is compatible with a wide range of amplification sources, allowing audiophiles to tailor their sound preferences to suit their individual tastes.

In conclusion, the Genesis Advanced Technologies S4/8 is a masterclass in audio engineering, boasting advanced features like a proprietary ribbon tweeter, high-density MDF cabinet, and bi-wiring capabilities. Whether for casual listening or serious audiophile applications, the S4/8 delivers an immersive, high-fidelity sound experience that is hard to match.