Defini

Where Vision Meets Precision.

With over two decades of leadership in high-precision injection mould design, Edward Lai has redefined excellence across the electronics, automotive, and healthcare industries. As the visionary founder and Managing Director of Defini, and former Chairman of the Hong Kong Mold and Die Council (1993–2003), Lai’s technical ingenuity and strategic acumen have shaped global manufacturing standards.

Defini has dedicated itself to a mission : Redefining audio purity by addressing fundamental challenges in HiFi systems - Vibration rebound and interference. Through rigorous research, advanced engineering, and precision innovation, Defini has crafted groundbreaking solutions to elevate how audiophiles experience music, to resume the purest possible sound.

The Theory

When a loudspeaker reproduces audio signals, the mechanical oscillations of its drivers induce reactive forces that propagate vibrational energy into the cabinet structure. This phenomenon, known as structural resonance, generates secondary sound waves radiated directly from the cabinet surfaces. Given the cabinet’s substantial surface area and material composition, these parasitic emissions contribute an estimated 3–7% of total acoustic output - a measurable deviation from the driver’s intended signal that degrades tonal accuracy and transient fidelity.

Simultaneously, cabinet vibrations transmit kinetic energy to the loudspeaker’s supporting surface (e.g., stands, floors, or shelves). This energy is partially reflected back into the cabinet, creating a feedback loop of resonant rebound. The interaction between incoming and reflected vibrations induces phase cancellation or reinforcement at certain frequencies, artificially attenuating or amplifying specific harmonics. The result is a loss of spectral coherence, manifesting as blurred instrument separation, smeared transients, and a "muddy" audio clarification.

Uncontrolled cabinet resonance also radiates distorted sound waves omnidirectionally, contaminating the listening environment with unwanted echoes and interference causing time-delayed reflections, reduced precision in soundstage and harmonic overtones.

Together, these mechanical and acoustic distortions compromise the integrity of the original audio signal. Even minor vibrational artifacts compound to erode the listener’s experience - diminishing the clarity, immersion, and emotional resonance that define audiophile systems.

The Defini Solution

Since early 2023, Defini has dedicated itself to a mission: Redefining audio purity by addressing fundamental challenges in HiFi systems - Vibration rebound and interference. Through rigorous research, advanced engineering, and precision innovation, Defini have crafted ground-breaking solutions to elevate how audiophiles experience music, to resume the purest possible sound.

Traditional spikes and rubber isolators suffer from two main issues: they introduce excessive resonance and time-phase distortion. In simple terms, when the speaker vibrates, these feet not only fail to dissipate the vibration effectively but actually cause the speaker to produce additional rebound vibrations. Moreover, vibrations at different frequencies are reflected back to listeners at inconsistent times, leading to phase interference. The results of this are masked (or blurred) sound details, muddy low frequencies, and a narrowed overall soundstage.

A ceramic ball type isolator can improve low-frequency performance to some extent - producing less resonance than traditional feet. However, it cannot effectively control micro-vibrations in the high-frequency range. The point contact between the ceramic ball and the surface induces high-frequency resonance, resulting in muddled highs and a lack of perceived airiness in the sound.