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ESB 5.050


New Speaker Series


The philosophy of this project is to create a loudspeaker system with an extremely high transient response (dynamic),  in order to obtain a music reproduction with a more realistic impact and involvement.

To achieve this, the main goal was to reduce the moving masses in order to make the mobile part of the loudspeaker light and fast in its movements, favoring the sudden variations of movement transmitted by the piece of music through the amplifier.

Elegance and Technology, all Italian

A look inside - Tweeter and Midrange


• The carbon fiber reinforced, polymer matrix, composite dome, ensures extraordinary rigidity combined with a very low weight.

• The 28 mm (tweeter) and 50 mm (midrange) aluminum voice coil allows the use of very high power for this kind of component.

• The tweeter uses a very large, vented neodymium motor magnet optimized with computer simulations (FEA) to obtain a greater efficiency and improve linearity along all the voice coil’s excursion.

• Neodymium magnet is a high-grade type to reduce magnetic loss at elevated temperature and concentrate more energy in a small space.

• All motor parts are made by CNC process. This gives tighter tolerances and improved performance.

• Great attention was paid to the axial and radial ventilation of the moving coil, this to ensure high power handling, with reduced distortion, and increased durability. The axial ventilation holes reduce the compression of the air at the back of the dome with greatly reduced distortion and extended response into lower frequencies. 

• A special acoustic resistance helps to control the Ots.

• Residual resonances are killed by the under-dome, dB Cloth® damping material, this extends the frequency response to the lower limits and reduces harmonic distortion.

5000 Series

ESB 5.28 Exploded



Great attention was paid to the axial and radial ventilation of the moving coil, this to ensure high power handling, reduced distortion, and increased durability. The stepped back allows a very long cone excursion.

Metal parts machined from solid and refined material are CNC machined for maximum magnetic flux linearity, and minimum magnetic loss. This reduces distortion at high power levels.

A pure copper ring was inserted into the magnetic field to reduce harmonic distortion.

25 mm CCAW (Copper Clad Aluminum Wire) double layer voice coil wound on an aluminum former for exceptional power handling and compression-free reproduction to handle the most demanding musical passages. 

The carbon fiber reinforced, polymer matrix composite, exponential cone ensures an extraordinary rigidity combined with a very low weight. 

The eight twin-spoke anti-resonant and self-extinguishing carbon fiber reinforced ABS frame, ensures a drastic reduction of the cone's back reflections. The frame design assures high structural and torsional rigidity. This is the goal for perfect parts alignment and very tight construction tolerances.

The exclusive ESB design of the TSW (Twin Symmetrical Wave) double-wave rubber suspension allows an excursion with perfect progression and linearity. This feature ensures natural low-frequency reproduction at low as well as at high volume. 

Large Conex® spider allows  a smooth and gentle run at low excursions, and gently holds the cone  at high excursions, thus increasing the useful frequency range.

ESB 5.165

The UMA Unit


This special and exclusive component driver is a concept born way back in 70’s, its aim is to concentrate medium and tweeter emissions in a single virtual point. This minimizes phase delays and irregularities at the crossover point. (You can read more in The Phase page).

Both components use a very large neodymium motor magnet optimized with computer simulations (FEA) to obtain a great efficiency and improve linearity along all voice coil excursion. Neodymium magnet is an high grade type for eliminate magnetic losses at elevate temperature and concentrate more force in less space.

Great attention was given to the ventilation of the two components, through multiple axial ventilation holes. Residual resonance are killed by the under dome damping material named dB Cloth®. This extends the frequency response to the lower limits and reduces harmonic distortion. 

The high modul carbon fiber domes with integrated soft cloth (tweeter) and synthetic foam (midrange) suspension offers superb heat resistance, low weight and excellent self damping, with a natural and linear response, and a very low frequency extension. The carbon fiber guarantee an extremely natural and linear reproduction, with an excellent extension at the ends of the band.

Combined together the two component are able to reproduce with perfect linearity all spectrum from 500Hz to 25KHz. Small permanent magnets fix the tweeter and midrange grill in correct position and these are easy to remove for customize.


Passive Crossover


A passive crossover must be able to handle extreme variations in dynamics, the full range of audio frequencies, and the variable impedance of a loudspeaker load. ESB passive crossovers are carefully engineered to perfectly match the characteristics of the speakers they are designed for, so that they maintain an uniform acoustic response across the entire audio spectrum. Such sophisticated engineering requires very tight manufacturing tolerances. Ordinary crossovers, for example, often use electrolytic capacitors with tolerances of +/- 20% and metal core on the inductors. The response is often uncorrect and the characteristics may change from unit to unit. All ESB crossovers, on the other hand, use only non-inductive polypropylene or mylar dielectric capacitors (not electrolytic ones) individually tested to meet ESB tolerances. The special inductors used have extremely low loss so that the driving power of the speaker system is not lost in the network. A switch on the output side allows you to adjust the tweeter and midrange (in the 5.6K3CX) level according to the distance from the listener. Both the input and output connections are made using strong two-way screws locking audio connectors. They accept cables up to 4.5 mm (6 AWG). The PCB uses thick copper tracks to limit signal loss.

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