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JEM Design Audio M7s Reference Loudspeaker

Finn de Kroon by Finn de Kroon
March 16, 2025
Reading Time: 2 mins read
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JEM-Design-Audio-M7s-Reference-Loudspeaker

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The JEM M7s Reference loudspeaker stands out in the audio industry with its innovative two-way design, boasting a single crossover point that simplifies the listening experience while enhancing sound quality. This speaker is engineered for a neutral sound profile, ensuring maximum driver integration and the preservation of dynamics. Its design caters to modern living environments, making it suitable for placement near walls and in acoustically challenging spaces.

Advanced Technologies for Distortion Reduction

A significant aspect of the JEM M7s Reference’s design is its focus on minimizing harmonic distortion (THD) and intermodulation distortion (IMD). Given the unique challenges faced by two-way systems, the engineering team utilized multiple advanced technologies to maintain undistorted sound reproduction, even at higher volume levels.

JEM-Design-Audio-M7s-Reference-Loudspeaker-2

 

Flux Modulation Reduction

Key to this distortion reduction is the strategic incorporation of copper in the magnetic circuit, both inside and outside its non-linear components. This approach effectively reduces Force Factor Modulation and eddy current distortion within the motor system. Force Factor Modulation is a known contributor to IMD, making its mitigation critical for achieving high-fidelity sound.

Pistonic Cone Behavior

The quality of the driver cones plays a pivotal role in controlling both IMD and THD. The JEM M7s Reference features advanced drivers, with the woofer cone crafted from machined magnesium and the tweeter cone made of pure corundum (sapphire). Magnesium, celebrated for its lightweight and deformation-resistant properties, rivals the performance of beryllium—often the gold standard in speaker design—without the associated toxicity.

JEM-Design-Audio-M7s-Reference-Loudspeaker-3

Superior Cone Materials

The extreme hardness of corundum, rated at Mohs’ hardness 9, contributes to the stability of the tweeter cone. Both cones exhibit pistonic behavior, allowing them to move without deformation, thereby reducing additional modulation. This results in remarkable clarity and low distortion figures, enabling the drivers to follow the original audio signal with precision. The outcome is a lifelike musical reproduction characterized by exceptional detail.

Cabinet Design

An essential component of any high-end loudspeaker system is a robust and inert cabinet. The JEM M7s Reference boasts a cabinet constructed from solid hardwood, primarily walnut sourced from the oldest parts of the trunk, which features striking grain patterns. Each cabinet is hand-designed and produced in-house, ensuring meticulous craftsmanship.

JEM-Design-Audio-M7s-Reference-Loudspeaker-1

 

Enhanced Frequency Response

The cabinet’s improved facetting design not only contributes to a smoother frequency response but also enhances stereo imaging. This attention to detail in construction ensures that the speaker performs at the highest level, delivering an unparalleled listening experience.

Thorough Engineering for Optimal Performance

The tweeter of the JEM M7s Reference is strategically mounted in a dedicated, solid space. This design choice prevents energy from the rear of the woofer from interfering with the tweeter’s output.

Optimized Port Design

Additionally, the flow-optimized port, made from thick industrial-grade aluminum, plays a crucial role in maintaining sound integrity. Its rigidity and inertness significantly minimize low-frequency energy losses, allowing the system to perform well beyond its size and expectations.

Tags: JEM DesignJEM Design Audio M7sloudspeaker
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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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