9cm CST Driver for Superior Localization and Natural Sound Field Reproduction
The TAD 9cm CST driver adopted for use in the TAD-E1TX-K was designed to align the midrange and tweeter sound source positions to make the midrange diaphragm work as part of the tweeter waveguide. This design homologizes the phase and directional characteristics of midrange and tweeter sounds at the crossover, achieving natural attenuation characteristics and ideal directional patterns over the entire frequency range. The midrange-woofer crossover is set at 420Hz, in order to achieve a natural sound field and good image localization during playback. For the tweeter diaphragm, TAD has used beryllium, making optimal use of its highly rigid and lightweight properties to deliver excellent high-frequency characteristics and crystal clear sound playback. The midrange diaphragm utilizes magnesium for its high internal loss, to eliminate coloration inherent to the material and reproduce pure midrange sounds with low distortion.
16cm MACC1 Diaphragm Woofer for Improved Linearity and Optimized Driving Force
In order to achieve rich, clear and faithful bass sound with no coloration, TAD has adopted a 16cm MACC1 woofer diaphragm incorporating laminated woven aramid fabric and other non-woven materials. The voice coil utilizes a highly-rigid titanium bobbin which provides high-level heat dissipation characteristics to ensure power linearity, thereby achieving faithful diaphragm response. The woofer is also equipped with LDMC2 magnet circuitry that increases the linearity of its drive and support systems. Combined with an optimized bass-reflex enclosure and powerful driving force delivered by a large ferrite magnet, this enables the woofer to reproduce clear, deep bass sounds without distortion.
1MACC: Multi-layered Aramid Composite Cone
2LDMC: Linear Drive Magnetic Circuit
Bi-Directional ADS Ports for Rich and Natural Deep Bass Sound Reproduction
The TAD-E1TX-K features slit-shaped ports located on both sides of the enclosure. Positioning horn-shaped forward and backward facing openings at the front and rear of the enclosure that lead to the ports themselves helps to drive the ports smoothly and efficiently. This design reduces port noise at high amplitude and prevents the leakage of low-order internal standing waves from the ports, eliminating the strong adverse effects of these waves on woofer-frequency sound playback and producing clear, quick response mid-low frequency range sound characteristics. The forward-backward and left-right symmetrical layout of these Bi-Directional ADS ports also cancels out forces that would vibrate the speaker enclosure, enabling deep and powerful bass sound reproduction. TAD’s existing ME1 and CE1 speakers have already been well received due to their excellent sound field reproduction over a wide range of frequencies, exceeding expectations for their size due to the inclusion of this technology. With the increased internal volumetric capacity of its floor-type design, the TAD-E1TX-K floor speaker system seeks to achieve superior sound field reproduction over an even wider range of frequencies.
Bi-Directional ADS Ports are positioned on both sides of the speaker enclosure
Speaker Unit Sound Source Position Alignment and Acoustic Axis Optimization
The baffle surface of the enclosure is inclined at an angle of 3 degrees in order to align the sound source positions of the CST (tweeter/midrange) and woofer units, increasing the accuracy of sound field reproduction in a floor-type double woofer system. The enclosure baffle edges are also more greatly rounded in order to reduce the effect of diffraction around the CST unit, with the acoustic axis of the CST unit installed at such an angle that it directly faces the listener. Moreover, by analyzing standing waves inside the enclosure and selecting and effectively positioning optimal sound absorption materials, it has been also reduced internal standing waves, which have an adverse effect on sound image and sound field reproduction.
Acoustically Isolated ISO-Mounted Network Filters
The network filters for the CST (tweeter/midrange) and woofer units are housed inside the bottom of the enclosure, and completely acoustically isolated from the main unit enclosure. This design prevents the network filters from being affected by high-level sound pressure inside the woofer and CST driver cabinets, preventing acoustic excitation of network filter elements and enabling clear and undistorted sound reproduction.
Machined Aluminum Baseplates Suppress Vibration and Enables Stable Installation
The bottom of the enclosure is fitted with two 15mm-thick baseplates, machined out of solid aluminum plate. Polymer resin plates sandwiched between the baseplates and the enclosure itself help to suppress vibration of the baseplates themselves, while a total of three floor spikes (two for the front baseplate and one for the rear) enables stable installation that is unaffected by the type of flooring material upon which the unit is placed. The main unit is slanted at a 3-degree angle, and the unit’s center of gravity is positioned optimally for three-point support, resulting in a structural design that solidly accepts the reaction from the woofer unit’s powerful driving force.