ESB Audio 4000 Series - 2 way System / no crossover
 
4.165
6.5"/165 mm Mid-Woofer
- Ultra-low carbon alloy steel pole piece CNC-machined using magnet
analysis software (FEM), cold forged in one-piece creates a perfect geometry. This produces an extra magnet force concentration just in front of the voice coil, focusing the magnetic force where needed.
- The Y35 ferrite magnet motor is optimized with FEA simulation to ensure a perfectly symmetrical magnetic flux in both directions of cone’s run. Motor metal parts are CNC machined from solid, refined material for maximum magnetic flux linearity and minimum magnetic loss. This reduces distortion at high power levels.
- Die cast aluminum alloy basket frame. This design structure offers great rigidity and minimal resistance to airflow movement without altering sound quality. The casting of this aluminum basket follows strict procedures that ensure compliance with regulatory specifications and help maintain consistent casting quality.
- CNC-machined ultra-low carbon alloy steel pole plate. This type of
manufacturing process ensures perfect flatness so it sits perfectly flush over the magnet without reducing any crucial magnetic flux.
- The large aluminum copper-clad vented voice coil can handle very high power while reproducing music with extreme realism and high dynamics. The copper clad aluminum wire voice coil is very lightweight and with excellent heat dissipation/capacity.
- Long-fiber, unbleached pulp cone with a special external treatment that makes this material a perfect combination of lightness, rigidity, and internal damping.
- Surround suspension made of soft nitrile rubber, UV-resistant, and unaffected by temperature change so that the superior acoustic qualities of this speaker are preserved long-term. Special edge design ensures perfect and free forward and backward movement.
- Deluxe protective stainless-steel grille.
 
Technical Specifications
- Nominal Impedance: 4 Ohm
- Nominal Power Handling: 150 Watt
- Transient Power: 300 Watt
- Frequency Response: 50 Hz ~ 6 KHz
- Sensitivity: 92.5 dB 2.83v/1m
 
4.28
1.1"/28 mm Dome Tweeter
 
- Silk dome with polymer laminated (Sonatex™) creates a perfect balance between weight, rigidity, and self-damping. The catenary curvature ensures wide dispersion of the tweeter.
- Under dome felt damper improves acoustic phase by absorbing reflections from the magnetic structure that bounce through the dome.
- High-grade neodymium magnet. Not all magnets of equal size are equal in strength. This high grade (N-52), high-energy magnet provides a high resistance to demagnetization and is over 25% stronger for the same mass than more common lower grade magnets. By utilizing a high-grade magnet, efficiency rises to extraordinary levels resulting in high output but controlled speaker.
- Main body in fiberglass-filled ABS for superior strength.
- Acoustic resistance component inside of the ventilation hole helps to control and dampen dome movement resulting in reduced distortion and a linear impedance curve for improved speaker/amplifier coupling.
- CNC-machined ultra-low carbon alloy steel pole plate. This type of
manufacturing process ensures perfect flatness so it sits perfectly flush over the magnet without reducing any crucial magnetic flux.
- The large aluminum copper-clad vented voice coil can handle very high power while reproducing music with extreme realism and high dynamics. The copper clad aluminum wire voice coil is very lightweight and with excellent heat dissipation/capacity.
- Deluxe protective stainless-steel grille with perforations calibrated to function as an acoustic lens, guaranteeing the sound emission will be in the on-axis part of the speaker, and also curved to the sides, which is very useful in car installations where speaker placement often results in off-axis listening.
- CNC-machined aluminum alloy, flush mounted flange.
 
Technical Specifications
- Nominal Impedance: 4 Ohm
- Nominal Power Handling: 100 Watt
- Transient Power: 200 Watt
- Frequency Response: 1.5 KHz ~ 22 KHz
- Sensitivity: 93.5 dB 2.83v/1m