Technics SU-G700 Grand Class Audio stereo integr. amp silver

This device is a used device in XXX condition.

An integrated amplifier for fascinatingly authentic music enjoyment.

Audio technology at the level of our reference class

The consistent use of components from our reference class ensures that the JENO Engine processes and transmits audio signals fully digitally and with minimal jitter from the input stage to the output stage. The LAPC circuit handles the phase calibration of the connected loudspeaker to achieve ideal gain and phase characteristics for each speaker. The newly developed, extremely low-distortion switching power supply controls the voltage supply so precisely that switching frequency deviations due to load fluctuations are eliminated.

JENO Engine (Jitter Elimination and Noise Shaping Optimization)

To ensure that the large data volume of the music signal is transmitted to the loudspeakers faithfully and without loss, the SU-G700 utilizes a fully digital amplification principle in the power amplifier stage, including the JENO Engine (Jitter Elimination and Noise Shaping Optimization). Here, too, a consistent focus on the Technics reference class is evident. The SU-G700 also employs the jitter reduction circuit developed by Technics to prevent unwanted clock jitter across the entire audible frequency range. This effectively suppresses the sound degradation caused by jitter, unlike conventional digital amplifiers. Furthermore, a unique, high-precision PWM converter circuit is used, promoting superior sound quality. Even music data with high dynamic range, such as that found in high-resolution music, is converted into PWM signals without loss. For this purpose, the speed, degree, and quantization of the noise shaping have been optimized. These technologies enable an exceptionally natural and detailed reproduction, revealing even the finest nuances in the music to the listener.

LAPC (Load Adaptive Phase Calibration)

The impedance of a loudspeaker changes with frequency. The power amplifier must drive the loudspeakers regardless of their specific characteristics. Conventional digital amplifiers drive the loudspeakers via a low-pass filter in the output stage. This makes the influence of the connected loudspeakers' impedance characteristics much stronger. Although the amplitude characteristics of conventional amplifiers can be controlled using negative feedback, optimizing the phase characteristics is not possible. Therefore, Technics has developed an adaptive optimization algorithm for loudspeaker impedance. It corrects the loudspeaker's impulse response using digital signal processing. To do this, it measures the amplifier's amplitude-phase characteristics with the loudspeakers connected. This new method allows for the smoothing of the frequency response characteristics of amplitude and phase, which is not possible with conventional amplifiers. The time accuracy of the resulting amplifier signal leads to a sound image with precise spatiality.

Ultra-fast, low-noise hybrid switching power supply

In a conventional switched-mode power supply, the switching frequency varies depending on the load change. This is intended to control the cycles of the on-state to stabilize the output voltage. However, this fluctuation in the switching frequency impairs sound quality. The newly developed power supply of the SU-G700 reduces sound-degrading noise components by fixing the switching frequency. Furthermore, the final stage of the switched-mode power supply is equipped with a linear regulator that stabilizes the output voltage. This linear regulator uses specially manufactured, high-precision electrolytic capacitors.

Furthermore, the new resonant power supply reduces the level of switching noise. The components used for noise reduction – such as capacitors – were carefully selected. Numerous innovations ensure that noise is avoided, thus guaranteeing crystal-clear, pure sound.

Architecture to reduce digital noise

The computer interfaces (network, USB-A, USB-B) utilize power conditioners with non-magnetic carbon film resistors. These effectively suppress magnetic distortion. In addition, high-precision mica capacitors are used, characterized by low dielectric losses, high voltage withstand capability, and excellent temperature stability. To ensure the highest possible sound purity, the SU-G700 systematically suppresses the intrusion of external noise.

High sound quality thanks to three-part construction

Integrated amplifiers contain a variety of different circuits. Some regulate the sensitive input signals from the sources, while others handle higher currents, such as in the power amplifier stages or the power supply sections. The SU-G700 features a three-part block design (power supply, amplifier section, input section). Shielding effectively isolates the three sections from one another. This prevents interference between the circuit blocks. The result: exceptional sonic purity. Furthermore, the chassis's high rigidity suppresses vibrations from electronic components, thus minimizing sound degradation.

Smart circuit activation

Circuits can be controlled in such a targeted manner that digital modules, such as those for the display or for analog and digital connections, are switched off to minimize noise during music playback.

Battery-powered clock generator

For the power supply of sensitive circuits such as the clock generator, complete isolation against noise and mains fluctuations is provided. Technics utilizes decades of experience in decoupling power supplies through the use of batteries. This technology enables preamplifier sections with extremely low noise.

High-quality analog circuits

Analog input signals are converted into digital signals with high precision. This is achieved using the high-quality 192 kHz/24-bit Burr-Brown PCM1804 A/D converter (manufactured by Texas Instruments). Analog sources also benefit from sensitive signal processing, resulting in crystal-clear sound reproduction. High-quality switching relays are used for switching between sources.

Low-noise phono input

To reduce background noise, a low-noise field-effect transistor (FET) in differential-parallel configuration is used in the input stage. A four-stage gain setting ensures optimal matching to the phono cartridge being used. This gives the user complete freedom regarding their equipment and listening environment.

Class AA headphone amplifier

The Class AA headphone amplifier features separate amplification circuits for the voltage and current amplification of the headphone signal. A high-current operational amplifier handles the current amplification. The high-resolution PWM output signal from the JENO engine is converted into an analog signal with high precision. The result: optimal headphone drive. Regardless of the headphone's impedance, this technology allows for music playback with optimally minimized distortion across an ultra-wide frequency range.

Rigid aluminum housing

The extremely rigid metal double chassis consists of an inner and an outer chassis, both made of sheet steel. This preserves sonic purity and eliminates vibrations and noise. The inner chassis is made of 1.2 mm thick sheet steel, while the top of the cabinet base is made of 2 mm thick sheet steel. The front panel is made of 7 mm thick aluminum to shield against electromagnetic interference.

Technical data:

Accurate Digital Technology

JENO Engine (Jitter Elimination and Noise Shaping Optimization)
LAPC (Load Adaptive Phase Calibration)
Ultra-fast, low-noise hybrid power supply
Battery-powered clock generator
Highly stable metal double chassis

Noiseless Signal Technology

Digital Noise Isolation Architecture (measures to reduce digital noise)
Intelligent circuit activation

Technics Definitive Design

Highly stable housing
Structure in three separate sections

FTC output power

70W + 70W (1kHz, THD 0.5%, 8O, 20kHz LPF)
140W + 140W (1kHz, THD 0.5%, 4O, 20kHz LPF)

Input sensitivity / Input impedance

LINE 200 mv/ 22 kO, PHONO (MM) 2.5 mV / 47 kO

transmission range

High level inputs 5 Hz-80 kHz (-3dB, 8 O),
PHONO (MM) 20 Hz - 20 kHz (RIAA DEVIATION ±1 dB, 8 Ω),
DIGITAL 5 Hz - 90 kHz (-3 dB, 8 O)

load impedance

4 - 16 O

Analog inputs

High level inputs x2 (LINE1 IN, LINE2 IN / MAIN IN, PHONO (MM) x 1)

Digital inputs

Digital coaxial input x 2 / Optical digital input x 2 / USB-B input x 1

Analog outputs

PRE OUT x 1, LINE OUT x 1 (for analog source device only)

Headphone output

Yes

USB DAC (USB-B)

USB Audio Class 2.0, Asynchronous transmission mode

Supported formats

DSDYes (2.8224 MHz, 5.6448 MHz, 11.2896 MHz)

PCMYes (32, 44.1, 48, 88.2, 96176.4, 192352.8, 384 kHz/ 16, 24, 32 bit)

power supply

AC220-240 V, 50 Hz / 60 Hz

electricity consumption

85 W

Dimensions (W x H x D)

430 x 148 x 428 mm

Weight

Approx. 12.3 kg (guideline value)

Accesories

Remote control, power cable, user manual

Information on used equipment

Accessories

remote control