ESB Audio - 9000 Series - 9.1T-28 1.1"/28 mm High-End Dome Tweeter
 
Main Features
- TCA System for back air flow control which reduces turbulence, noise, and controls the damping of the dome.
- Pole cup CNC machined from a solid piece of ultra-low-carbon steel.
- Main magnet made from N52H neodymium, best both for the magnetic force in relation to the mass, and for high temperatures support (120° F vs. 80° F of a standard neodymium magnet).
- Magnet plate made of ultra-low-carbon steel.
- Secondary or superior magnet used to stabilize and regulate the magnetic flux and concentrate it only in front of the voice coil, increasing efficiency, manageable power, distortion and bandwidth.
- Pure copper ring helps reduce the inductance of the voice coil so that it offers minimal resistance during high frequency reproduction. This means better high-frequency response, enabling the speaker to reproduce high-frequency sounds more accurately. Reduced inductance contributes to better handling of rapid transitions of audio signals. This improves the speaker's ability to more accurately reproduce transient sound pulses.
- FCA System: a special structure to control the flow of air moved by the dome. This creates a periodic damping resistance and dictates that the release of the energy accumulated in the movement of the dome occurs in a controlled and fast manner, without creating persistent oscillations. This contributes to a more precise and faithful response to the audio source and accuracy, and the overall quality of the audio experience.
- Super light aluminum voice coil uses a high-strength aluminum alloy to reduce its thickness and its weight. The winding is also aluminum with a pure copper “skin”. This results in a perfect combination of resistance and weight of the wire.
- Pure Japanese silk dome resin impregnated with integrated suspension. This catenary profile dome is made in a single piece that also includes the suspension. This greatly reduces the weight, allowing the tweeter to reproduce very high frequencies. The absence of joints prevents break-up and/or vibrations.
- Felt ring to eliminate any deleterious vibration.
- Light stainless steel grill for dome protection.
- The faceplate isn’t just cosmetic, but acts as an acoustic lens. Its shape dramatically reduces side refractions an unwanted occurrence in a car installations where windows create harmful refractions.
- Super flexible cables with high silver content to reduce electrical connection losses.
- Aluminum threaded fixing ring.
- Finishing stainless steel ring (optional).
 
Technical Specifications
- Nominal Impedance: 4 Ohm
- Nominal Power Handling: 110 Watt
- Transient Power: 220 Watt
- Frequency Response: 1.4 KHz ~ 25 KHz
- Sensitivity: 94.5 dB 2.83v/1m