Defini BP2230 Bookshelf Platform Speaker Isolators 220x300 Pair

Defini BP2230 Bookshelf Platform Speaker Isolators 220x300 Pair

The Defini "BP" Bookshelf Platform Series are specially designed for bookshelf speakers in a variety of sizes with patented mechanical decoupling technology designed to minimise vibrations from your bookshelf speakers to ensure sound resonance between your equipment is minimised as much as possible resulting in a clearer, more targeted sound from your setup.

Perfect for those looking to minimise vibrations reaching their high-fidelity bookshelf speakers; ensuring the speakers performance is not negatively impacted during use.

Key Features:

• Designed for bookshelf loudspeakers of various sizes
• Pair of 2 bookshelf platforms
• Top plate measures 220 x 300 mm
• Patented mechanical decoupling technology
• Converts kinetic energy into controlled potential energy
• Maintains stable performance from low to high frequencies without generating unwanted resonance

Patented Mechanical Decoupling Technology

Defini decouplers are proved to articulate the performance of loudspeakers, providing audiences the pristine transient fidelity from their valued equipment. It also provide the audiences with natural timbre, immersive soundstage and holographic imaging.

Vibrations from your speakers travel into the supporting surface, reflect back into the cabinet and blur the music. Defini isolators control the interface - helping reduce resonant rebound so you hear more of what matters.

WHY DOES WHAT'S UNDER YOUR SPEAKERS MATTER?

The Defini 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.

Dual-Laser Doppler Vibrometers & Fourier Analysis Software

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About Defini

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 ground-breaking solutions to elevate how audiophiles experience music, to resume the purest possible sound.