Reference-class High-quality Audio Technology
 
Inheriting the reference-class audio technology concept, the JENO Engine transmits and processes audio signals in full digital and with minimal jitter from the input stage to the power stage. Speaker load adaptive phase calibration (LAPC) ensures ideal gain and phase characteristics for any type of speaker. The newly developed low-distortion switching power supply realises accurate power supply by suppressing switching frequency fluctuations caused by load shifting.
 
JENO Engine
(Jitter Elimination and Noise-shaping Optimization)
 
In order to faithfully transmit the massive amount of audio data sent to the speakers without loss, the SU-G700 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-G700 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.
 
High-speed Silent Hybrid Power Supply
With a conventional switch mode power supply, the switching frequency changes in response to the load fluctuation in order to control the switching ON time for stabilising the output voltage. This fluctuation component in the switching frequency has a negative impact on sound quality. The newly developed power supply reduces the noise component harmful to sound quality by fixing the switching frequency. In addition, the latter stage in the switching power supply is provided with a linear regulator to stabilise the output voltage. The linear regulator uses custom, high-definition electrolytic capacitors.

What's more, our current resonance-type power supply decreases the level of switching noise. The parts used for absorbing noise, such as capacitors, were carefully selected. All possible measures were taken to achieve low noise and reproduce clear sound.
 
Specifications
 
JENO Engine (Jitter Elimination and Noise-shaping Optimization)
LAPC (Load Adaptive Phase Calibration)
High-speed Silent Hybrid Power Supply
Three-section Configuration
Low-noise PHONO Input
Class AA Headphone Amplifier
 
Accurate Digital Technology
JENO Engine (Jitter Elimination and Noise-shaping Optimisation)
LAPC (Load Adaptive Phase Calibration)
High-speed Silent Hybrid Power Supply
Battery Driven Clock Generator
High-rigidity Metal Double Chassis
Noiseless Signal Technology
Digital Noise Isolation Architecture
Optimally Activated Circuit System
Technics Definitive Design
High-rigidity Cabinet
Three-section Configuration
Output Power
70 W + 70 W (1 kHz, T.H.D. 0.5 %, 8 Ω, 20 kHz LPF)
140 W + 140 W (1 kHz, T.H.D. 0.5 %, 4 Ω, 20 kHz LPF)
Input Sensitivity / Input Impedance
LINE 200 mV / 22 kΩ, PHONO (MM) 2.5 mV / 47 kΩ
Frequency Response
LINE 5 Hz - 80 kHz (-3 dB, 8 Ω),
PHONO (MM) 20 Hz - 20 kHz (RIAA DEVIATION ±1 dB, 8 Ω),
DIGITAL 5 Hz - 90 kHz (-3 dB, 8 Ω)
Load Impedance
4 - 16 Ω
Analogue Input Terminal
LINE x 2 (LINE1 IN, LINE2 IN / MAIN IN) , PHONO (MM) x 1
Digital Input Terminal
Coaxial Digital x 2, Optical Digital x 2, USB-B (PC)
Analogue Output Terminal
PRE OUT x 1, LINE OUT x 1 (ANALOGUE SOURCE ONLY)
Headphone Output
Yes
USB-DAC (USB-B)
USB Audio Class 2.0, Asynchronous Mode
Support Codec
DSD
Yes (2.8224 MHz, 5.6448 MHz, 11.2896 MHz)
PCM
Yes (32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz / 16, 24, 32 bit)
Power Supply
AC120 V, 60 Hz
Power Consumption
85 W
Dimensions (W x H x D)
430 x 148 x 428 mm(16 15/16 x 5 13/16 x 16 27/32 in.)
Weight
Approx. 12.3 kg(Approx. 27.2 lbs)
Accessories
Remote Control, AC Cord, Owner's Manual