However, the anodised aluminium centre plug is probably the most conspicuous feature of the D 4 woofers.

It replaces the traditional dust cap in the centre of the loudspeaker cone at the place where the dust cap would normally be mounted - thereby making the cone lighter and thus faster.

Also this prevents potential break-up points where the dust cap would have been glued to the cone.

In addition, it prevents over- and under pressure behind the dust cap when the cone moves back and forth. The advantage is more dynamic and precise sound reproduction.

The aluminium centre plug also has a cooling effect on the voice coil providing greater power handling capability and very important, a stable sound reproduction when playing loud.

The mid-woofers all feature lightweight 2-layer voice coils in order to achieve maximum “attack” (the ability to start and stop precisely) and minimum distortion – these acoustic properties are of utmost importance for optimum voice reproduction.

In the designated woofer for the D 450 there is a small but significant difference.

It is supposed to work only at the lowest frequencies. By using a heavy 4 layer voice coil, we can reduce sensitivity at high and mid frequencies while gaining efficiency at low frequencies.

This works in 2 ways: A high B*L product** will increase port output and reduce bandwidth around port resonance. The increased weight will counteract the increased B*L at higher frequencies. The result is a gain of about 3 dB at low frequencies compared to the 2 layer type in the same cabinet.

**The combination of magnet size/force and length of the voice coil wire results in the so-called B*L Product. In popular you could call this the size of the “engine” in a loudspeaker.

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JAMO D 4 manual

D 4 specifications

The JAMO D 4 series represents a blend of innovative audio technology and sophisticated design, aimed at providing an immersive sound experience for music lovers and home theater enthusiasts alike. With its elegant aesthetic and robust performance, the D 4 series has garnered attention for its commitment to high-quality audio reproduction.

One of the standout features of the JAMO D 4 is its advanced driver technology. Each speaker in the series features a proprietary bass driver designed for low distortion and deep bass response. The driver’s design allows for a more controlled and responsive sound, making it ideal for bass-heavy music genres as well as detailed vocal performances. Coupled with a high-frequency driver that delivers crisp and clear highs, the D 4 speakers produce a well-balanced audio experience.

The cabinet design of the JAMO D 4 series is not only visually appealing but also essential for optimal sound quality. The enclosure is crafted from high-quality materials that minimize resonances, allowing the speakers to produce purer sound. Its sleek and modern finish is available in a variety of colors and textures, ensuring a seamless integration into any home décor.

Another significant technology integrated into the JAMO D 4 speakers is the waveguide technology, which enhances sound dispersion and helps to create a wider listening area. This technology ensures that everyone in the room can enjoy a consistent sound experience, making it perfect for gatherings or home theater settings.

In terms of compatibility, the D 4 series is designed to work well with various audio setups, including receiver amplifiers and streaming devices. Its flexible connectivity options make integration into existing systems effortless.

Additionally, the JAMO D 4 speakers embody energy efficiency, equipped with features that help reduce power consumption without compromising performance. This commitment to sustainability is echoed in various aspects of their design and manufacturing processes.

In summary, the JAMO D 4 series stands out for its combination of advanced audio technologies, stylish design, and versatility. With superior bass performance, high-frequency clarity, and aesthetic appeal, the D 4 speakers are a compelling choice for anyone looking to elevate their audio experience. Whether for music, movies, or gaming, the JAMO D 4 delivers exceptional sound quality that will undoubtedly enhance your listening enjoyment.