Drivers, Tweeter | JAMO D 4 specs

Drivers

Tweeter

The tweeter in the D 4 range, has already been well acclaimed in Jamo products, as it is used in the Jamo D 7 THX Ultra2 system, winner of the EISA award as “High-end Home Theatre 2002/2003”.

However, to suit the exact purpose in D 4, we developed a

new, asymmetric front baffle.

D 4 asymmetrical tweeter design

The tweeter was chosen for 3 main reasons:

1.Extremely low distortion

2.Totally freedom of accentuation of “s” sounds.

3.The low range extension

The 1" tweeter features a completely new design of the diaphragm/dome called Dual Concentric Diaphragm.

The coated textile diaphragm looks like two rings, one on the “inner” and one on the “outer” side of the voice coil – hence the name “Dual Concentric”.

The quite eye-catching centre plug has two purposes: It is a wave-guide and it clamps the diaphragm.

The purpose of clamping the middle of the dome is to eliminate out phasing of the treble at high frequencies. At high frequencies only the cone area just around the voice coil is able to follow the voice coil whereas the middle of the dome typically breaks up and actually is in opposite phase –

resulting in zero, or very limited output from the tweeter. By clamping the

middle of the dome and only using a ring of the cone area on each side of the voice coil, the tweeter is able to reproduce frequencies up to 40kHz.

The magnet features a vented pole piece leading into a chamber at the backside. The chamber and the “ventilation hole” in the pole piece are tuned in for achieving the very low resonance frequency at 600Hz (normal resonance frequency for a tweeter is around 1.5k Hz).

Furthermore the pole piece is copper plated in the magnet gap in order to reduce eddy currents. The purpose of this is to obtain linear impedance throughout the full frequency range and thus a linear treble reproduction.

The voice coil former is made of aluminium for optimum heat disposal. The voice coil is made of cupper plated aluminium wire, because aluminium weighs less than

cupper, but the copper plating is needed because of its conducting qualities.

The “wire” from the driver’s terminal to the voice coil is a thin litz wire. Usually, the voice coil wire continues to the terminals. However, litz wire features much higher compliance and therefore it has less influence of the movements of the voice coil.

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.