Technics G700M2 Package

In order to faithfully transmit the massive amount of audio data sent to the speakers without loss, the SU-G700M2 power amp section uses full digital amplification employing the JENO Engine, based on the design concept of reference systems. In order to solve the issue of sound quality degradation due to jitter, which poses problems for conventional digital amplifiers, the SU-G700M2 has an original jitter reduction circuit that eliminates jitter over the entire audible frequency range. Also, a unique, high-precision PWM (Pulse Width Modulation) conversion circuit is used for PWM conversion, which is important for sound quality. By optimising items such as the noise-shaping speed, degree, and quantization number through our unique expertise, data even in the wide dynamic range contained in high-resolution sound sources is converted to PWM signals without loss. These technologies provide reproduction of natural and finely detailed sound, enabling perception even of delicate music nuances.

LAPC
(Load Adaptive Phase Calibration)

Speaker impedance changes with each frequency and a power amplifier is required to drive speakers without being affected by the speaker’s characteristics. However, conventional digital amplifiers are connected to speakers through a low-pass filter at the output stage, so they are even more strongly affected by the speaker impedance characteristics. Also, although the amplitude characteristics of conventional amplifiers due to negative feedback were improved, the phase characteristics could not be enhanced. We thus developed a speaker impedance adaptive optimisation algorithm that performs correction to the ideal impulse response through digital signal processing by measuring the frequency amplitude-phase characteristics of the amplifier with the speakers connected. This new technique enables flattening the frequency characteristics of amplitude and phase, which had previously not been achieved by amplifiers, as well as delivering a sound with rich spatial expression.

Advanced Speed Silent Power Supply

The power supply technology incorporated in the reference-class model SU-R1000 has been employed for improved speaker drive power and a greater feel of energy. The switching frequency has been increased from the conventional 100kHz band to the 400kHz band to ensure stable supply of voltage and current and to reduce adverse effects of modulation noise on the audio quality. The device is equipped with the same GaN FET and SiC SBD as those mounted in the SU-R1000 to deliver maximum performance from the high-speed switching power supply system.
What’s more, a Super Low Noise Regulator is provided in the later stage. It prevents the decrease of regulation due to fixed switching frequency and impedes the mixing of noise component into high frequencies. The result is a low-noise and high-response power supply that maximises the performance of the digital amplifier.

Three-section Configuration

In integrated amplifiers there are a variety of circuits, including circuits that handle the micro-signals of inputs and those that handle a large current, such as output circuits and power-supply circuits. The SU-G700M2 uses a three-section construction with partitions installed between the circuit blocks according to the signal level handled. This eliminates interference between circuit blocks, thus achieving clear sound quality. In addition to the three-section construction, the SU-G700M2 comes with a bottom chassis featuring a two-layer construction with 1.2-mm-thick and 2-mm-thick steel plates, a top panel made of a 1.6-mm-thick steel plate and a 7-mm-thick aluminium front panel for improved vibration damping.

Low-noise PHONO Input

PHONO MC input is now supported. The PHONO input achieves low noise by using a differential parallel connection configuration of a first-stage, low-noise FET. In addition, four-level gain adjustment enables selection of the best gain according to the cartridge output. This enables optimal playback of high-grade analogue recorded sound sources tailored to the user’s environment.

Class AA Headphone Amplifier

The SU-G700M2 uses a Class AA headphone amplifier with separate amplifier circuits for voltage amplification and current amplification of the audio signal. The voltage is amplified by a high-grade operational amplifier, the current is amplified by an operational amplifier with high current-supply capability, and the high-grade PWM signal output from the JENO Engine is converted to analogue with high precision, thus enabling headphones to be ideally driven. This makes it possible to reproduce music with low distortion and a wide frequency range no matter what the load impedance of the headphones is.

High-Grade Parts

The power supply unit for the amplifier features Technics’ exclusive block electrolytic capacitor optimised through scrupulous tuning, which was installed in the SU-R1000.

The large ground terminal accommodates a thick, large-diameter ground wire.

The screws used for securing the wires sending audio signals to the speaker terminals are made of nonmagnetic brass.

Technics SL-G700M2:

A new generation of multi-digital audio player that supports a wide range of music sources and delivers highest sonic fidelity.

High Precision Coherent D/A Converter

The SL-G700M2 is equipped with the High Precision Coherent D/A Converter, which is the result of the accumulation of these technologies, converts digital values to analogue signals with the utmost precision and outputs them to an amplifier. It is composed of (1) coherent processing, (2) high-performance D/A converter in dual monaural configuration, and (3) a proprietary discrete amplifier circuit.

The dual ESS ES9026PRO is newly adopted for the DAC chip. The symmetrical placement of one L/R unit on each side and their independent transmission structures reduce mutual interference and faithfully reproduce the sound image and musical space contained in the sound source.

The filter circuit after the D/A conversion uses an amplifier circuit with a unique discrete configuration instead of an operational amplifier IC. This realises even higher responsiveness and S/N and reproduces even the most subtle sounds.

Coherent Processing Technology

Technics' new proprietary coherent processing technology improves the reproducibility of impulse signals by minimising amplitude and phase deviations that occur throughout the D/A conversion process for signals up to 192 kHz PCM using proprietary digital signal processing*. With this processing, purity of the sound is increased, and the sound image is clearer.
*DSD signals such as Super Audio CD are input directly to the DAC without performing this processing.

Multi-Stage Silent Power Supply

Digital audio players that handle small signals require thorough noise suppression because even the slightest noise can significantly affect sound quality. The Multi-Stage Silent Power Supply provides thorough noise suppression in three stages: (1) High-speed switching power supply, (2) low-noise regulator, and (3) current injection active noise cancelling.

The SL-G700M2 uses a high-speed switching power supply of approximately 300 kHz, which is also used for the analogue circuits of the SU-R1000 reference-class integrated amplifier. By increasing the switching frequency, the interference of noise on the music playback bandwidth is reduced and a highly responsive power supply is achieved.

The low-noise regulator also provides low noise at high level and stable power supply are realised with the fine tuning of circuit patterns.

Current Injection Active Noise Canceling

This newly developed technology, current injection active noise canceling removes unwanted noise components by applying an inverse phase current to the detected noise. More effective current noise rejection can be achieved by using the push/pull method in combination with conventional noise rejection by drawing current.

Super Audio CD and MQA, Also USB-B Input is Newly Supported
The SL-G700M2 supports playback of Super Audio CD, which is a high-quality audio disc format. For further sound quality enhancement, a "Pure Disc Playback" mode, dedicated for Super Audio CD/CD playback. This model also supports MQA and is capable of full decoding playback of MQA files and MQA-CDs. Various other high-resolution formats are also supported, including WAV/AIFF, FLAC/ALAC, and DSD file playback.

In addition, the SL-G700M2 is equipped with a new USB-B port that allows constant connection to a network audio server or PC for playback of high-resolution sound sources from the connected device

Supports a Wide Variety of Music Sources and High Connectivity

The SL-G700M2 supports Chromecast built-in, which enables a wide range of music streaming services from Google Chromecast-enabled apps, as well as AirPlay 2. Wi-Fi® and Bluetooth® wireless connections are also supported.*
*A Google Voice-activated Speaker must be included in the same network.
Compatible music streaming services will be supported sequentially through firmware updates.
Network content services are operated by their respective service providers, and service may be discontinued either temporarily or permanently without notice. Some content may not be available in the country in which you reside.
Registration/subscription may be required. Fees may apply.

Housing and Chassis that Support High Sound Quality and High-quality Design

The SL-G700M2 is divided into four sections inside the chassis, with the power supply, digital interface, analogue circuitry, and disk drive sections, each being independent of the other. This suppresses mutual interference between circuits and reduces sound quality degradation. The disc drive adopts a three-layer chassis configuration. Powerful vibration-damping and quiet construction, including a disc tray made of die-cast aluminium, ensures high-precision disc playback.
The exterior features a hairline-finished 7 mm-thick aluminium front panel and 3 mm-thick aluminium side panels, as well as an engraved Technics logo for a high-grade design and finish.