Tetracoil Double Voice Coil (TTC) technology is based on an innovative magnetic structure where two different inside-outside voice coils are wound on the same former and suspended evenly in the two magnetic gaps.
Active Cooling System (ACS) technology is related to different ways of extracting heat from the transducer in order to minimize power compression and increase power handling.
Edge Wound Aluminum Voice coil (EWAL) technology identifies models where this specific kind of wire is used in the voice coil winding.
Active Impedance Control (AIC) technology utilizes a secondary voice coil permanently fixed on the pole piece of the magnetic structure. The magnetic field generated by this secondary coil provides induction reduction for a flat impedance curve that increases sensitivity and extends high frequency bandwidth, while reducing harmonic and inter- modulation distortion.
The Proprietary Phase Plug (3P) technology identifies a combination of radial and tangerine slot geometric design. With its short openings and high flare rate value, 3P technology assures low distortion in the mid-high frequency range, providing a smooth coherent wavefront at the horn entrance.
The Double Silicon Spider (TSS) technology was developed by Eighteen Sound in 1998 and consists of a double layer spider structure, glued by a special silicone based adhesive mix. The result is an ultra-linear piston action and full suspension control across the entire working range.
The Triple Silicon Spider (TSS) technology is an evolution of the DSS technology. It consists of a triple layer spider structure, glued with a special silicone based adhesive mix. This suspension type is able to control the moving mass with high linearity, demonstrating an exceptional stability of mechanical parameter values in the long term.
Eighteen Sound iD loudspeakers are optimized with very low impedance for maximum power transfer from a Class D type amplifier.
IPAL - The Eighteen Sound IPAL loudspeakers are designed to couple perfectly with IPAL Differential Pressure Control technology from Powersoft S.p.A. The OPAL power amplification module features a zero latency pressure-sensor feedback applying real-time correction that maximizes the control of selected Eighteen Sound high efficiency transducers for unparalleled output at low frequencies.
Double Demodulating Rings (DDR) identifies the presence of two aluminium rings embedded in the pole piece of the magnetic structure. These rings have been designed to dramatically reduce the intermodulation and harmonic distortion while improving the transient response of the transducer.