The definitive living room audio center that enables seamless enjoyment of video, audio, and music through next-level integration using Technics’ full digital technologies.
 
Full Digital Amp, JENO Engine
(Jitter Elimination and Noise-shaping Optimisation)
The SU-GX70 uses a fully digital amplifier that incorporates Technics’ renowned digital audio technology. Its digital transmission system processes signals fully digitally in all stages from input to output. Compared to analogue transmission, this system is less susceptible to signal degradation caused by external noise, ensuring more precise signal transmission. Accurate signal processing not only delivers high-resolution digital audio but also maintains the soft texture inherent in analogue recordings.

Further, a JENO Engine has been used in the HDMI ARC (Audio Return Channel), which has been installed in a Technics product for the first time. This helps to reduce any degradation in sound quality caused by jitter during the transmission of digital audio signals (S/PDIF), ensuring unparalleled levels of clarity in TV audio.
 
Ideal Impulse Response through 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 technique enables flattening of the frequency characteristics of amplitude and phase, which had previously not been achieved by amplifiers, while also delivering a sound with rich spatial expression.
 
Twin Power Supply Circuit System
The design of the power supply is extremely critical in audio systems containing amplifiers, digital circuits and other such components. To eliminate any adverse effects on the amplifier, the SU-GX70 is equipped with a dedicated power supply for the power amplifier circuits that is independent from all other circuits. As such, the same electrolytic capacitors installed in high-end models have been used in the dedicated amplifier power supply and the power amplifier components.

The SU-GX70 uses a high-speed switching power supply of approximately 130 kHz. By increasing the switching frequency, noise interference on the music playback bandwidth is reduced. This enables highly responsive power supply for music signals and powerful speaker drive capability.
 
Specifications
 
Full Digital Amp, JENO Engine (Jitter Elimination and Noise-shaping Optimisation)
Ideal Impulse Response through LAPC (Load Adaptive Phase Calibration)
Twin Power Supply Circuit System
High-quality Audio through Low-impact HDMI Video Output
Pure Amplification Mode
Analogue Input Using Discrete Amp Circuits
 
Output Power
40W+40W(1kHz,T.H.D.1.0%,8Ω,20kHz LPF)
80W+80W(1kHz,T.H.D.1.0%,4Ω,20kHz LPF)
Load Impedance
4Ω-16Ω
Frequency Response
PHONO (MM)
20Hz - 20kHz ( RIAA DEVIATION ±1dB, 4Ω )
LINE
20Hz - 40kHz ( -3dB, 4Ω )
DIGITAL
20Hz - 80kHz ( -3dB, 4Ω )
Input Sensitivity / Input Impedance
PHONO (MM)
2.0 mV / 47 kΩ
LINE
200 mV / 23 kΩ
Analogue Input Terminal
LINE x 2
PHONO (MM) x1
Digital Input Terminal
Optical digital x2
Coaxial digital x1
USB-A x1
USB-B x1
Analogue Output Terminal
PRE OUT x1
Digital Output Terminal
HDMI ARC
Headphone Output
Yes, Stereo Φ6.3 mm (1/4")
USB-A
USB Audio Class Specification
USB 2.0 High-speed
USB Mass Storage class
iPod/iPhone/iPad
No
Support Codec
WAV
Yes (32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz / 16, 24, 32 bit)
FLAC
Yes (32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz / 16, 24 bit)
DSD
Yes (2.8 MHz, 5.6 MHz, 11.2 MHz)
AIFF
Yes (32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz / 16, 24, 32 bit)
ALAC
Yes(32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz / 16, 24 bit)
AAC
Yes (32, 44.1, 48, 88.2, 96 kHz/16-320kbps)
MP3
Yes (32, 44.1, 48 kHz / 16-320 kbps)
PC(USB-B)
USB Audio Class Specification
USB 2.0 High-speed
USB Audio Class 2.0, Asynchronous mode
Support Codec
LPCM
Yes (32, 44.1, 48, 88.2, 96, 176.4, 192 352.8, 384 kHz / 16, 24, 32 bit)
DSD contol mode
ASIO Native mode, DoP mode
MQA Decorder
Yes
LAN(DMR)
WAV
Yes (32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz / 16, 24, 32 bit)
FLAC
Yes (32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz / 16, 24 bit)
DSD
Yes (2.8 MHz, 5.6 MHz, 11.2 MHz)
AIFF
Yes (32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz / 16, 24, 32 bit)
ALAC
Yes (32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz / 16, 24 bit)
AAC
Yes (32, 44.1, 48, 88.2, 96 kHz/16-320kbps)
MP3
Yes (32, 44.1, 48 kHz / 16-320 kbps)
Ethernet Interface
LAN (100BASE-TX/10BASE-T)
Wi-Fi
IEEE 802.11a/b/g/n/ac/ax
2.4 GHz band / 5 GHz band
Google Cast™
Yes
AirPlay 2
Yes
Bluetooth® (Support codec)
Yes (AAC, SBC)
Tuner
FM
Power Supply
AC 120 V ,60 Hz
Power Consumption
63W
Dimensions (W x H x D)
430 mm × 98 mm × 368 mm
(16-15/16 x 3-55/64 x 14-31/64)inch
Weight
Approx. 6.6 kg
Approx. 14.6 lbs
Accessories
AC Cord, FM Indoor Antena, Remote Control, Batteries for Remote Control, Owner's Manual