ESB Audio 4.UMA speakers
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ESB Audio 4000 series speakers
The latest model series 4000 (Quattromila), born in 2024, benefits from extensive technical research that has enabled the use of new materials, previously reserved only for much more expensive loudspeakers. This was also achieved thanks to the parallel development with the highest model series 9000 (Novemila), with which the Quattromila series shares several common elements. The main goal of ESB engineers was to achieve a much cheaper product, while maintaining high quality sound and exclusive design. It is the design that catches the eye at first glance, led by the luxurious grills of all speakers in a matte black finish, which expresses the aesthetic similarity with the top model series. In all speakers of the Quattromila series, you will also notice powerful neodymium magnets, which guarantee superior efficiency and the ability to achieve high sound pressure levels even when using low-power amplifiers. The other noble materials used, such as aluminum or steel, also command respect, but the main advantage of Quattromila speakers is above all the sound. This can be defined as "classical", in other words, genre-neutral and without sound coloring. This fundamentally differentiates it from the higher 5000 series, which almost competes in price and whose sound, on the other hand, is more suitable for so-called "light music" (often referred to as music that is easy to listen to), but also jazz or rock. Emphasis was also placed on easy installation in today's modern vehicles - all speakers have high sensitivity, they are also designed for off-axis sound reproduction, and for the tweeters, for example, you can choose between three installation design options. The 4000 series includes a total of five individual components for the variable construction of two-band and three-band systems, which, thanks to their sound quality, will impress even the most demanding listeners.
ESB Audio 4.UMA 2-way unit
A unique UMA unit is also available for the 4000 series, which includes both a tweeter and a center speaker. This special and exclusive component driver is a concept born already in the 70s, when it was a huge success in home sound. The aim of this unit is to concentrate the midrange and tweeters into a single virtual point, which minimizes phase lags and crossover point irregularities. The speaker consists of a 25mm tweeter and a 75mm mid-range driver with a different dust cover to have a mid-range function (not full-range) and not disturb the tweeter frequencies.
ESB Audio 4.UMA unit tweeter
Among the main strengths of the 4000 series are the tweeters, which stand out not only for their refined design, but also, of course, for their sound. The silk shell with polymer lamination (Sonatex™) creates a perfect balance between weight, stiffness and self-damping. The catenary curvature provides a wide dispersion of the tweeter. A felt damper under the dome improves the acoustic phase by absorbing reflections from the magnetic structure that bounce off the dome. The high quality neodymium magnet (N-52) provides excellent resistance to demagnetization and is over 25% stronger for the same weight than the more common lower grade magnets (N-48). By using this magnet, the efficiency rises to an extraordinary level, resulting in high performance, but also great control of the speaker. The main body is made of ABS plastic filled with fiberglass for excellent strength. An acoustic resistive component inside the vent helps control and dampen dome movement, resulting in reduced distortion and a linear impedance curve for better speaker-to-amp coupling. The ultra low carbon steel pole plate is cold forged in one piece and CNC machined using FEM technology to achieve perfect geometry. This creates an additional concentration of magnetic force just before the voice coil, which concentrates the magnetic force where it is needed. This type of manufacturing process ensures perfect flatness so the board sits flush with the magnet without reducing the critical magnetic flux. The copper-clad aluminum voice coil can handle very high performance while reproducing music with extreme realism and high dynamics. The copper clad aluminum wire voice coil is very light and with excellent heat dissipation. At the same time, it provides maximum sensitivity and extends the high-frequency response of the speaker. The luxurious stainless steel protective grill has a unique acoustic lens shape, which allows the sound to be reproduced not only in the axis, but at the same time to the sides. This is very useful in automotive installations where speaker placement often results in off-axis listening. The low resonant frequency ensures an optimal frequency range even in the case of 2-band systems. The package includes two types of removable tweeter housing for variable installation options.Center speakers of the ESB Audio 4.UMA unit
The 4000 series center speakers have undergone a long and very expensive development to achieve high-fidelity sound with an extended frequency response. The speaker has a high-quality neodymium magnet (Y-35), which guarantees an excess of energy and easily reproducible excursion peaks, during which the coil works very quietly in the magnetic field. The ultra-low carbon steel pole plate is cold forged in one piece and CNC machined using FEM technology to achieve perfect geometry. This creates an additional concentration of magnetic force just before the voice coil, which concentrates the magnetic force where it is needed. This type of manufacturing process ensures perfect flatness so the board sits flush with the magnet without reducing the critical magnetic flux. The speaker basket is made of die-cast aluminum alloy. This construction offers perfect rigidity and minimal resistance to air flow movement without changing the sound quality. Casting of this aluminum basket follows strict procedures that ensure compliance with regulatory specifications and help maintain consistent casting quality. The copper-clad aluminum voice coil can handle very high performance while reproducing music with extreme realism and high dynamics. The copper clad aluminum wire voice coil is very light and with excellent heat dissipation. At the same time, it provides maximum sensitivity and extends the high-frequency response of the speaker. The membrane made of long-fiber pulp with a special external treatment represents the perfect combination of lightness, stiffness and internal damping. The peripheral suspension made of soft nitrile rubber is resistant to UV radiation and unaffected by temperature changes, thanks to which the excellent acoustic properties of this speaker are preserved for a long time. The special design of the edges ensures perfect and free movement forward and backward. The package includes luxurious steel grilles in a matte black finish.
About the ESB Audio brand
The history of ESB Audio dates back to 1972, when this Italian brand was officially founded. ESB audio is one of the most famous speaker system manufacturers of the second half of the 20th century, and during their rich history they have launched many innovative technologies and many high-end home audio products that have achieved huge worldwide success. Based on the experience gained, in 1984, ESB engineers began to engage in research aimed at optimizing sound in the automotive environment, and two years later began the production of the first car speakers. Thanks to the great success, ESB began to focus more and more on the automotive industry and its demanding challenges. Car Audio is starting to be a phenomenon of the time, and in 2005 a school focused exclusively on vehicle sound was founded in the city of Aprilia, where ESB is based. It was then that the final decision was made to leave the world of home audio and focus exclusively on vehicle sound systems. Currently, ESB is part of the Italian company Apex Group, together with the American manufacturer of audiophile amplifiers and DSP processors Zapco. In the offer you will find several model lines of speakers, led by the super high-end Diecimila three-way system, which represents probably the best quality and most expensive car speakers on the market today. And that is the main mission of ESB audio. To produce speakers of the highest quality, focused on faithful sound, which will allow the user to reproduce as the interpreter intended. Exactly according to the company's slogan "Just like live".
| Catalog number | ESB 4.UMA |
| Brand | ESB Audio |
| Links | Official web presentation (English) |