Technics SU-GX70


The SU-GX70 uses a fully digital amplifier that incorporates Technics’ renowned digital audio technology

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Technics SU-GX70

Technics SU-GX70


Grand Class Network Audio Amplifier

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)

Full Digital Amp

The Technics 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 Technics 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 Technics 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.

High-quality Audio through Low-impact HDMI Video Output

Technics Audio Venue

For the SU-GX70 to receive audio signals through the HDMI ARC (Audio Return Channel), due to the specifications, video signals must first be output from the SU-GX70.

However, the output of these signals can cause unwanted noise.

As such, the video signals are output from the SU-GX70 at a lower rate, and the digital value of the colour of each pixel is set to zero.

This ensures low-load operation between the HDMI transmitting/receiving devices, preventing any unwanted noise generation from the video signals.

This also reduces any impact on sound quality. Further, transmitting the signals from the TV to the JENO Engine via the shortest possible route minimises any further impact from jitter.

This is a mechanism unique to Panasonic/Technics as HDMI licensors.

Pure Amplification Mode

In Pure Amplification Mode, shutting off the power supply to the network and HDMI circuits removes any noise from the device or antenna.

This ensures music playback with even better clarity.

Analogue Input Using Discrete Amp Circuits

The discrete amp circuit used in the SU-GX70 was redesigned and adapted from the circuit used in the SU-R1000, and the same symmetrical layout has been used.

Further, other high-quality audio parts of the same grade as those used in the SU-R1000 have also been adopted, such as low-noise FETs, thin-film resistors, film capacitors, and electrolytic capacitors. In this way, the device has been fine-tuned to every detail.

Specfications; Technics SU-GX70

Specfications; Technics SU-GX70

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


Headphone Output

  • Yes, Stereo Φ6.3 mm


·       USB Audio Class Specification

    • USB 2.0 High-speed
      USB Mass Storage class

·       iPod/iPhone/iPad

    • No

·       Support Codec

o   WAV
      • Yes (32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz / 16, 24, 32 bit)
o   FLAC
      • Yes (32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz / 16, 24 bit)
o   DSD
      • Yes (2.8 MHz, 5.6 MHz, 11.2 MHz)
o   AIFF
      • Yes (32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz / 16, 24, 32 bit)
o   ALAC
      • Yes(32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz / 16, 24 bit)
o   AAC
      • Yes (32, 44.1, 48, 88.2, 96 kHz/16-320kbps)
o   MP3
      • Yes (32, 44.1, 48 kHz / 16-320 kbps)


·       USB Audio Class Specification

    • USB 2.0 High-speed
      USB Audio Class 2.0, Asynchronous mode

·       Support Codec

o   LPCM
      • Yes (32, 44.1, 48, 88.2, 96, 176.4, 192 352.8, 384 kHz / 16, 24, 32 bit)
o   DSD
      • Yes (2.8 MHz, 5.6 MHz, 11.2 MHz)

·       DSD contol mode

    • ASIO Native mode, DoP mode

MQA Decorder

  • Yes


·       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)


  • IEEE 802.11a/b/g/n/ac/ax
    2.4 GHz band / 5 GHz band

Chromecast built-in

  • Yes

AirPlay 2

  • Yes

Bluetooth® (Support codec)

  • Yes (AAC, SBC)



Power Supply

  • AC 220 V – 240 V,50/60 Hz

Power Consumption

  • 63W

Dimensions (W x H x D)

  • 430 mm × 98 mm × 368 mm


  • Approx. 6.6 kg


  • AC Cord, DAB Indoor Antena, Remote Control, Batteries for Remote Control, Owner’s Manual
GX70 Black

Additional information


Black, Silver



Technics Faithful to Sound Technology, Emotionally Appealing to the Eye. Designed for sound and harmony. The new Technics products have been designed with two key design concepts at their core. The first is a design that resonates with the music lover's heart. This is not simply a piece of electrical equipment but an essential element in the complete listening experience and a product that the music lover is proud to own and display in their home. The second is a design faithful to the traditional Technics identity with no superficial elements. The product has been precisely designed to only include essential elements enabling the high level of performance required. Integrating heritage and new innovations to create Technics' core design values. The passion and detail that go into creating Technics products are not only confined to technological innovations. When it comes to design, the passion is preserved by focusing on a well-engineered body construction that complements and enhances the technology inside. High-grade components are used for even the smallest elements such as the tactile, minimalist buttons. However, the past also meets the present to bring back a sense of analogue emotion with the switches and the sight of VU meters bouncing as you listen. Furthermore, the dignified colours and form of the equipment will surely help to create a prestigious aura wherever it is placed. Technics has a proud and diverse heritage that we have used to establish a new form of design identity that we hope will be equally loved over the years. What type of presence should Technics have in the emotional act of listening to high-quality audio? Their new design will surely provide the answer at a single glance.
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