TAD Launches Evolution Series Floor Speaker and Power Amplifier

Further Enhanced TAD Evolution Series Technology


TAD-M1000-K / TAD-M1000-S

TAD-M1000-K / TAD-M1000-S

Design concept

Technical Audio Devices Laboratories, Inc. (TAD) announces the launch of the TAD-E1TX-K floor speaker system and TAD-M1000-K/S power amplifier, as new editions to TAD’s “Evolution” series.

The TAD-E1TX-K is a further evolution of the TAD-ME1 — which achieves sound playback with excellent sound field reproduction and audio image localization over a broad frequency range that exceeds expectations for its compact body size—finished into an imposing yet dignified-feeling floor speaker system.

The TAD-M1000-K/S seeks to enhance the overall system aesthetic by adopting a design that matches that of the TAD-D1000 disc player and DA1000 D/A convertor (launched in 2013). The TAD-M1000-K/S comes in a choice of two colors: black or silver. With revisions to the design of its voltage amplification circuitry and power supply grounding, and the adoption of new components, this amplifier delivers further improvements to the high-speed and innovative sound quality already offered by the Evolution series.

Evolution Series:

TAD’s Evolution series incorporates new and innovative technologies while at the same time delivering high-resolution and other digital technologies demanded by customers. Since the launch of the Evolution series TAD-E1 speaker system in 2011, TAD has continued to drive the further evolution of the series by incorporating additional technologies such as bi-directional ADS ports, CST (Coherent Source Transducer) drivers equipped with beryllium and magnesium diaphragms, and other technologies developed through the creation of the TAD “Reference” series, which aims to achieve the very highest sound quality. 

Main Features of the TAD-E1TX-K

1) 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.

2) 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

3) 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

Bi-Directional ADS Ports are positioned on both sides of the speaker enclosure

4) 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.

5) 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.

6) 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.

Main Features of the TAD-M1000-K/S Power Amplifier

1) Design Matches that of TAD-D1000 and TAD-DA1000 for Enhanced System Aesthetic

By adopting a design that matches that of the TAD-D1000 and TAD-DA1000 (launched in 2013), TAD has given the TAD-M1000-K/S a finish that is fitting of the agility, high-definition and high-level sound quality of the Evolution series. The amplifier is available in a choice of two colors—silver and black—making it easy to choose the best match for the usage environment.

TAD-D1000 / TAD-DA1000

TAD-D1000 / TAD-DA1000

2) Dual Logic-Circuit Technology for Enhanced Symmetry

The TAD-M1000-K/S adopts Dual Logic-Circuit Technology, enabling accurate driving of the speaker diaphragms by ensuring that positive and negative electric current supplies are exactly the same, and ensuring symmetry in all other respects, including circuit-type and structural aspects. The amplification circuitry adopts a BLT-type design in which two completely independent amplifiers (from the input terminals to the output terminals) are connected via a balanced connection. The power supply circuity is designed such that not only are negative and positive power supplies symmetrical, but all power supply circuit channels are independent, including power supply transformer, rectification circuitry and stabilization circuitry. In terms of structural aspects, the TAD-M1000-K/S adopts a dual mono structure which considers identicalness in terms of power transformer positioning, circuit board pattern configurations and even wiring length.

3) Vibration Control Technology

The TAD-M1000-K/S achieves isolated mounting by adopting a three-point support structure using built-in spike insulation. By clarifying load points, reducing the effect of vibrations from the floor, and enhancing isolation performance, these functions have improved the power, clarity and amount of information contained in the sound produced. It is also equipped with the same robust, high-grade, large-sized speaker terminals used in TAD’s Reference series, which serve to reduce stress on speaker cables connected to the rear side of the amplifier is rack-mounted. By improving mechanical and electrical connection stability, the TAD-M1000-K/S enables maximum effective utilization of the owner’s high-grade speaker cables.

4) High Power Usage Efficiency

The amplifier’s Class D output stage employs a power MOSFET (metal-oxide-semiconductor field-effect transistor) which eliminates lead terminals and boasts ultra-low on-resistance. This achieves high-efficiency power characteristics with power usage rates of 90% and above, conveying energy from the power supply directly to the speakers. The leadless power MOSFET offers low-loss, high-speed performance, and adopts a simple single configuration which also contributes to achieving sharper sound quality.

5) High-Capacity Power Supply

The TAD-M1000-K/S adopts a transformer-dropper type which is unaffected by switching noise, and increases the power supply’s signal-to-noise ratio. It also utilizes a 1kVA-class toroidal power supply transformer which utilizes high-quality electromagnetic steel, which helps to reduce energy-conversion loss through strong coupling between primary and secondary-side coil windings. The rectification circuitry consists of a large-capacity 33,000μF electrolytic capacitor (developed specifically for TAD) and high-speed Schottky barrier diode configuration, which helps to support the speedy and dynamic sound quality delivered by the Class D amplifier.

6) Bi-Amp Functionality

The TAD-M1000-K/S is equipped with Bi-Amp functionality which achieves improved separation characteristics, eliminating interference between units by enabling direct connection between each speaker unit and each amplifier. This enables users to take full advantage of the original true performance of both the speakers and the amplifier itself and enjoy crystal clear, undistorted sound reproduction.

Main specifications: TAD-E1TX-K Speaker

Type:     3-way, bass reflex, floor type
Speaker Structure:     3-way system
Woofer:     16-cm cone type x 2
Midrange/Tweeter:     Coaxial 9-cm cone type / 2.5-cm dome type
Reproduction Frequency Band:     29 Hz-60 kHz
Crossover Frequency:     420 Hz, 2.5 kHz
Output Sound Pressure Level:     88 dB (2.83 V-1 m)
Maximum Input:     200 W
Nominal Impedance:     4 Ω
Unit Polarity:     Low range (+), middle range (+), high range (+)
External Dimensions:     350 mm (W) x 1215 mm (H) x 512 mm (D)
Weight:     46 kg
Accessories:     Cone spikes x 3, short cable x 2, cleaning cloth, auxiliary legs x 2 pcs, spike holders x 3

Main specifications: TAD-M1000-K/S Power Amplifier

Rated Output:     500W (JEITA, 2-channel simultaneous drive, 20 Hz ~ 20 kHz, T.H.D. 1.0%, 4Ω)
Rated Distortion Factor:     0.05% or less (20 Hz ~ 20 kHz, 250W, 4Ω)
S/N Ratio (Input Short, A Network):     At least 112 dB
Frequency Characteristics:     5 Hz ~ 50 kHz, -3 dB
Gain (Balance):     29.5 dB
Input Terminals (Sensitivity / Impedance):     1.5 V / 220 kΩ (Balanced) / 0.75 V / 47 kΩ (Unbalanced)
Power Supply Voltage:     AC100V, 50 Hz / 60 Hz
Power Consumption:     250W (standby power consumption: 0.5W)
External Dimensions:     440 mm (W) x 148 mm (H) x 479 mm (D)
Weight:     29 kg