Speakers ESB Audio 3.69K2.5

Name: Speakers ESB Audio 3.69K2.5
Brand: ESB Audio
Price: 299.00 EUR

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component speakers, 6 x 9", 120/240 W, 4 Ω, 88.5 dB (1W/1m), installation depth 72 mm
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Component speakers ESB 3.69K2.5

The ESB Series 3000 loudspeaker system (Tremila) has been developed and assembled with great commitment to research into materials and technical solutions of the highest level. Speaker baskets have been designed to achieve maximum torsional stiffness. A membrane made of pressed paper with a waterproof treatment is the best combination of lightness, rigidity and the ability of the membrane to dampen any unwanted vibrations. All mid-bass speakers are equipped with a Y-35 class ferrite magnet motor, with significantly higher performance than classic "standard" ferrite magnets. The tweeters are made of a thin cloth membrane impregnated with silk for a very soft and natural sound. The coil has excellent ventilation with anti-resonance chambers and is damped with a special oil based on liquid iron. The speakers are supplied with accessories for flexible installation. This is a set without frequency crossovers (which can be purchased additionally) intended for active connection to an amplifier and a DSP processor. In this set, you will find a mid-bass and wide-range speaker that replaces the classic tweeter.

ESB Audio 3000 series mid-bass and full-range speaker

It is widely known that diaphragms made of paper are the best combination of lightness, stiffness and the ability of a cone to dampen any unwanted vibrations and distortions. Paper is a popular material for its excellent sound properties and is waterproof thanks to a polymer developed exclusively at ESB. The treatment does not change the appearance and parameters of the speaker like shiny polymers, which add a significant amount of mass to the membrane itself and significantly modify the sound result. The ESB treatment protects the membrane from moisture and dripping water, as well as from accidental splashes on the front of the membrane. Perbunan suspension rubber provides the dual function of high damping and great lateral stability. This means that the diaphragm is "forced" to only move vertically, eliminating lateral movements that could cause contact with the coil and magnet. The 25mm voice coil of the woofer uses an aluminum carrier and winding with double-layer copper wire technology with an aluminum core. The basket made of ABS plastic reinforced with glass fiber was designed to obtain maximum torsional rigidity, but at the same time offer minimum resistance to the passage of air pushed by the membrane from its back. This is clearly visible from the numerous stiffeners and ribs. The basket and its stiffness play a vital role in balancing the coil in the magnetic circuit. An equally important factor is the damping of this component, as metal baskets often tend to resonate and this significantly changes the final sound result of the speaker. The material used, in addition to not being so sensitive to thermal changes, is non-flammable and, above all, completely resistant to resonances. Additionally, the ABS plastic basket allows for better clamping force torque than typical pressed steel frames and ensures that the voice coil remains well centered in the magnetic field. The speakers are equipped with a class Y-35 ferrite magnet motor with significantly higher output than the classic "standard" ferrite magnets, which ensures easier control of the power applied to the speaker as well as its excellent efficiency. The metal parts of the motor use low carbon steel and have been designed to achieve maximum magnetic saturation. This guarantees the best electroacoustic parameters, as the eddy currents created by the movement of the membrane are largely suppressed.

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 19th 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 they started 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 becoming 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 belongs to 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 3.69K2.5
Brand	ESB Audio
Links	Official web presentation (English)
Speaker typeCoaxial speakers: Coaxial speakers are characterized by a so-called all-in-one design. The tweeter and mid-bass speaker are in one basket. The advantage is simpler assembly, but thanks to the connection or proximity of the bands in one speaker, the sound quality will usually be reduced. As a rule, in the middle of the mid-bass speaker, there is a tweeter whose voice coil works in the second air gap of the common magnetic circuit. The three-way coaxial speaker consists of a mid-bass speaker, a center speaker and a separate tweeter in the front on a special beam. Component Speakers: Component speakers are characterized by a division into individual frequency bands, treble + mid-bass + or. bass band. The individual speakers can be placed completely separately, which results in a better sound and acoustic performance. In the vast majority of cases of component speakers, an external crossover is also supplied, which divides the treble, middle / mid-bass, and into the three-band the bass band or allows setting the decibel level of the tweeter (e.g. +2 dB, 0 dB, -2 dB), steepness (e.g. 6dB/Oct. 12dB/Oct.) or active or bi-amp connection.	Component 2-band
RMS powerRMS speaker power is the constant power of the entire system, not just one speaker or one side. This is also the performance of continuous use of the speakers. If the RMS power is exceeded for a long time, the speakers may be irreversibly damaged!	120 W
Max. (maximum performancePeak performance , which the speaker can play for a moment (approx. 0.5 s), for example when hitting drums in a song. If the max power is exceeded, the speakers will usually be damaged!	240 W
Sensitivity (SPL 1W/1m)Sensitivity, sensitivity or efficiency of the speaker. Speaker sensitivity is given in decibels (dB) and simply put, the higher the value, the lower the demands on the amplifier's power. This is a defacto rating of how a speaker converts watts to sound. Sensitivity ratings are in noise level measured at 1 meter from the speaker using 1 W (watt of power) or using 2.83 volts at the source at 1 meter. A higher decibel level means the speaker is louder with less power. For every 3 dB increase in sensitivity, the speaker requires half the power to reproduce the same volume. For example, if an 88 dB speaker needs 100 Watts to produce a certain volume, then a speaker with a sensitivity of 91 dB needs only 50 Watts to reach the same volume.	90dB
ImpedanceImpedance - measurement of electrical resistance. When buying speakers, it is important to make sure that the impedance matches the amplifier or car stereo you are using. Example: A 2 Ohm speaker cannot be connected to an amplifier that is only stable up to 4 Ohms! A 4 Ohm speaker can easily be used with an amplifier that is stable up to 2 Ohms. The most common speaker impedance today is 3 - 4 Ohm.	4 Ω
Frequency rangeThe ability of the speakers to play a signal from the lowest frequency to the highest, or the speaker's ability to faithfully reproduce sound in a specific frequency band. Professionally: In the frequency range from 40 to 16,000 Hz, the vast majority of fundamental and overtones (harmonics) of all musical instruments are found. We are interested in the course of the radiated sound pressure in this range of frequencies when the loudspeaker system is supplied with constant power. We call this course the frequency characteristic, which tells us the level of radiated sound pressure in decibels (dB) depending on the frequency. The frequency characteristic of a speaker or speaker system can be expressed most succinctly with a graph. Mostly, however, the frequency characteristic is indicated by indicating the maximum tolerance of the sound pressure in the given frequency range, e.g. 50 to 15,000 Hz -+ 6 dB. Since the frequency characteristics of loudspeakers and systems in general are quite uneven, some manufacturers do not even specify this maximum tolerance of sound pressure in decibels in their catalogs for reasons of prestige. Data impoverished in this way is unfortunately worthless. What is valid is that the manufacturer offers a speaker system with a frequency range of 30 to 20,000 Hz, if he is worried about stating the maximum unevenness of the sound pressure in this range, because he can have a tolerance of, for example, +- 20 dB. The unevenness or undulation of the frequency curve in good speaker systems for high-quality music performance should not exceed +-3 dB in the 80 to 12,000 Hz band and +-6 dB in the 40 to 16,000 Hz band. Greater unevenness already depletes or emphasizes certain tonal areas, which can cause audible or even disturbing distortion. The proportion between fundamental tones and higher harmonics also changes, thereby changing the color of the sound, and individual musical instruments as well as the entire musical image sound unnatural.	55 - 22000 Hz
The diameter of the mid-bass speakerWe state the diameter of the speaker as the diameter of the entire speaker, not including the mounts, when smaller speakers (87, 100, 130 mm) have extra mounts. Some speakers are oval and there the dimension is given in inches, always the shortest side to the longest side. One inch is approx. 2.5 cm.	6 x 9"
Installation depth of the mid-bass speakerThe installation depth of the speaker is measured from the bottom edge of the magnet to the bottom edge of the tin, plastic or cast speaker basket, or speaker bearing surfaces.	72 mm
Mid-woofer diaphragm materialThe material that was used for the speaker diaphragm. Don't be afraid of the paper, it surprisingly has a very natural and high-quality sound and, thanks to the surface treatment, it can withstand moisture without any problems.	Pressed paper
The diameter of the full-range speaker	65 mm
Installation depth of the full-range speaker	36 mm
The diaphragm material of the full-range speaker	Pressed paper
Frequency crossover included in the packageThe crossover is an important part of defacto all loudspeakers. A crossover usually contains different resistor values, coil sizes, and capacitor types that fundamentally modify the sound. We describe below what the turnouts are for. Component Speakers: A crossover is part of every quality component speaker system. Its task is to ensure the distribution of frequencies that the amplifier produces in the entire acoustic spectrum of frequencies so that each of the speakers receives only that part of the band that it can optimally play in terms of efficiency and minimal distortion. Coaxial speakers: In most cases, coaxial loudspeakers have a simple crossover (6dB/Oct.) formed by a capacitor at the tweeter.	No
Cover grids included in the packageOriginal cover grilles in speaker packaging.	No
Price forIf the price is for a pair, the package always includes 2 pieces of everything, e.g. 2x mid-bass, 2x tweeter and 2x crossover.	Few