Technics SU-GX70 Grand Class Network Audio Amplifier - Silver

Exclusive speaker and room calibration features only available from Technics

Space Tune™ for optimal sound quality tuning

Space Tune™ enhances your audio experience by optimizing the sound space to suit your specific listening environment. It offers four convenient presets—Free, Wall, Corner, and Shelf—so you can adjust the settings best suited to your acoustic environment and installation location. The L/R Custom function lets you enter separate settings for each individual speaker. For even more precise control, you can select "L/R Custom" in the Technics Audio Center application, allowing you to precisely adjust the sound to your listening position and deliver the best audio quality anywhere in the room.

LAPC (Load Adaptive Phase Calibration)

Speaker impedance changes depending on the frequency, which can make it difficult for conventional amplifiers to deliver consistent sound quality. This problem is even more acute in digital amplifiers due to the use of low-pass filters, which can further impact performance. To address this, we created an adaptive speaker impedance optimization algorithm. Simply perform the "LAPC measurement process" with the remote control, and the technology will measure the frequency and phase characteristics of the amplifier connected to the speakers and digitally correct them in real time. The result is smoother, more balanced sound with greater depth and spatial clarity, for a richer listening experience.

Fully digital amplifier, JENO Engine

The SU-GX70 features a fully digital amplifier with Technics' advanced digital audio technology, which processes signals digitally from input to output. This minimizes signal degradation due to external noise, delivering precise, high-resolution sound while preserving the warmth of analog recordings. Additionally, the JENO Engine in the HDMI ARC (Audio Return Channel) reduces jitter, ensuring crystal-clear TV audio.

Superior quality audio via low-impact HDMI video output

To ensure the SU-GX70 delivers the best possible sound when using HDMI ARC, video signals must be sent first, which can sometimes cause noise. To avoid this problem, the SU-GX70 outputs video signals at a slower rate with pixel colors set to zero, reducing noise and protecting sound quality. Additionally, signals are transmitted from the TV to the JENO Engine via the shortest possible path, minimizing jitter and ensuring crystal-clear audio. This unique approach from Panasonic/Technics, as HDMI licensees, ensures the highest sound quality with minimal interference.

Pure Amplification Mode for Even Lower Noise

In Pure Amplification mode, the SU-GX70 enhances the listening experience by turning off the power to the network and HDMI circuits. This eliminates any potential noise from these components or the antenna, allowing the amplifier to focus solely on music playback. The result is even clearer and more detailed sound quality, allowing you to enjoy music with the highest level of purity and precision.

*The network and HDMI circuits can be turned off individually.

Dual Power Supply System

Power supply design is critical in audio systems that contain amplifiers, digital circuits, and other similar components. To eliminate any negative effects on the amplifier, the GX70 features a dedicated power supply for the power amplifier circuits that is independent of any other circuitry. Therefore, the same electrolytic capacitors used in high-end models are used in the dedicated amplifier power supply and power amplifier components.

The GX70 uses a high-speed switching power supply of approximately 130 kHz. By increasing the switching frequency, noise interference across the music reproduction bandwidth is reduced. This results in a highly responsive power supply for music signals and increased power to the speakers.

High-quality audio components for a pure audio experience.

The SU-GX70 uses a redesigned amplifier circuit inspired by the high-end SU-R1000, with the same symmetrical layout for optimal performance. We've also included the highest-quality audio components, such as low-noise FETs, thin-film resistors, and premium capacitors, just like in the SU-R1000. This attention to detail ensures that the SU-GX70 produces exceptional sound quality, giving you a unique audio experience.

Numerous input options, various network functions

HDMI ARC ensures superior music and audio quality from your video source

Compatible with numerous music sources - The SU-GX70 supports multiple music sources including radio, analogue input (PHONO(MM)/LINE), optical digital input (e.g. TV), coaxial digital input and USB input.

Superior quality audio wirelessly - The GX70 plays high-resolution music wirelessly from your smartphone, tablet or PC. Supports Bluetooth®, AirPlay2, Spotify Connect®, Internet Radio and Google Cast™ to allow streaming of multiple music services.

SPECIFICATIONS

- integrated stereo amplifier with Ethernet/Wi-Fi network streamer, Bluetooth, DAC converter for external digital sources including HDMI ARC interface, built-in DAB/DAB+/FM tuner and MM phono stage;

- innovative design resulting from a unique approach, a concentration of cutting-edge technology, meticulous design and construction with superior quality components, capable of delivering surprising performance;

- power of 40 Watts per channel into 8 Ohms and 80 Watts per channel into 4 Ohms;

- frequency response 20 Hz - 40 kHz (-3 dB, 4 Ohms) for line signals, 20 Hz - 80 kHz (-3 dB, 4 Ohms) for digital signals and 20 Hz - 20 kHz for Phono signals (RIAA deviation +/- 1 dB, 4 Ohm);

- compatible with load impedances between 4 and 16 Ohm;

- extremely clean layout with rationalized separation of the different sections;

- fully digital signal path from the input stage to the speaker output terminals;

- discrete input stage with low-noise FETs and exclusive JENO (Jitter Elimination and Noise Shaping Optimization) processor circuit, which implements high-precision pulse width modulation (PWM) conversion using a clock generator in the noise-shaping system, capable of eliminating jitter across the entire frequency spectrum;

- proprietary active Load Adaptive Phase Calibration (LAPC) technology, capable of detecting the pulse returned by the speaker load and applying digital signal correction to optimize the system amplifier response, whose power is delivered in an ideal way with a dynamic, detailed, very low distortion and free from phase anomalies, with excellent driving capabilities when dealing with any speaker, regardless of impedance variations and across the entire frequency spectrum;

- encapsulated and shielded MM Phono preamplification stage of the highest quality;

- Twin Power Supply switching power supply stage with a frequency fixed at 130 kHz, highly responsive and efficient, with separate power supplies for the amplification stage and for the other circuits;

- proprietary Space Tune technology to finely adjust the acoustic emission characteristics to adapt them to the specific listening environment, equipped with effective and very useful presets for the most common types of positioning and customizable in Custom mode (currently only on iOS devices) to obtain an extremely accurate response tailored to your room;

- Pure Amplification mode, which can be activated at your discretion, capable of reproducing the sound with maximum purity thanks to the ability to deactivate, even individually, the power supply of the network and HDMI circuits;

- HDMI ARC interface uniquely designed to obtain crystal-clear and jitter-free audio, with a direct signal path from the TV to the JENO circuit;

- playback of digital sources with conversion of native DSD formats to ASIO and DoP up to 11.2 MHz and PCM up to 32 bit / 384 kHz;

- Roon Ready certification and streaming technologies Spotify Connect, TIDAL Connect (with native MQA decoding), Amazon Music, Internet Radio, Apple AirPlay 2, Google Cast with Multiroom functionality;

- possibility of interfacing with a NAS or any network server installed on a device in the local network with support for DSD audio formats up to 11.2 MHz and PCM up to 32/384 (WAV, FLAC, AIFF, ALAC, AAC, MP3);

- USB Type-A port on the front panel for playback of DSD audio files up to 11.2 MHz and PCM up to 32/384 (WAV, FLAC, AIFF, ALAC, AAC, MP3) from mass storage devices with a maximum capacity of 2 TB, formatted with the NTFS, FAT32 or FAT file system;

- proprietary Technics Audio Center application, available free of charge for Apple iOS and Android, for advanced setup and use of the amplifier's built-in playback services, with the option of choosing third-party streaming apps compatible with the available services;

- Bluetooth 5.1 receiver with AAC and SBC codecs;

- Ethernet LAN 100BASE-TX/10BASE-T RJ45 and Wi-Fi Dual Band 2.4 GHz / 5 GHz IEEE 802.11a/b/g/n/ac/ax network interfaces;

- radio tuner DAB/DAB+/FM;

- headphone amplifier with 6.3 mm jack socket on the front panel;

- L/R stereo analogue inputs: 2x unbalanced RCA, 1x unbalanced MM Phono RCA;

- digital audio inputs: 1x asynchronous USB Type-B (DSD512, PCM 32/384), 1x coaxial electrical S/PDIF RCA (24/192), 2x optical Toslink (24/96);

- HDMI ARC bidirectional digital interface;

- L/R unbalanced RCA stereo analogue Pre-Out output for connecting a sub or external power amplifier;

- remote control supplied;

- features and functionality of the services subject to changes and expansions, please check cyclically the presence of firmware updates on the official Technics website;

- Silver finish;

- dimensions (W x H x D) 430 x 98 x 368 mm;

- weight 6.6 kg.