Technics SU-G700M2, Hi-Fi reference amplifier

To power the superb new Technics SB-G90M2 speakers already presented in our columns, the brand quite logically announced at the beginning of the month the new Technics SU-G700M2 Hi-Fi stereo amplifier.

Identical in form to the SU-G700 appeared in 2017, the Technics SU-G700M2 evolves in substance with power technologies coming directly from the prestigious and statutory SU-R1000.

AS²PS Amplification

If the digital amplification delivering 2 x 140 W into 4 ohms (2 x 70 W into 8 ohms), the Technics SU-G700M2 therefore integrates the silent and ultra-fast power supply AS²PS (Advanced Speed ​​Silent Power Supply) . Based on very fast components, including Gallium Nitride (GaN) FET field effect transistors and silicon carbide (SiC) diodes, it offers increased responsiveness and efficiency of the power stage, in the goal of optimally managing the speakers. For information, the switching frequency has been multiplied by a factor of four between the SU-G700M2 and its predecessor, to now stand at 400 kilohertz.

Technics specifies that these developments lead to a more detailed soundstage, eliminating interference and distortion but without any shine of the high frequencies. The balance is therefore controlled.

Jeno and LAPC at the helm

Of course, the Jeno digital circuit (Jitter Elimination and Noise-Shaping Optimization) to reduce the residual noise generated by the power supply circuit is always in place. The same goes for the LAPC (Load Adaptive Phase Calibration) system so that the speakers can display a completely linear “amplitude / frequency” curve. The power supply and the network circuit are also specific in order to reduce the distortion caused by fluctuations in the frequency of the current. Finally, everything has been designed to reduce the signal path between the source and the amplification stage as much as possible.

There are still PWM (Pulse ‑ width modulation) conversion circuits dedicated to digital signal processing, with very high sampling frequencies, to provide a transparent and natural tone.

Rich connectivity and build quality

We also note a careful manufacturing with a 7 mm aluminum front, a double hyper-rigid metal frame with two superimposed 2 mm and 1.2 mm plates and an arrangement of the components according to three distinct and isolated blocks. others. The connection has two coaxial inputs, two optical, two analog line inputs / output, a phono input (MM and, new on the SU-G700M2, MC), an RCA stereo pre-out output, a USB Host type A port and an asynchronous USB type-B port. The latter is compatible with 2.8 / 5.6 / 11.2 MHz DSD files and accepts PCM files up to 384 kHz / 32 bit.

Namely, the SU-G700M2 also features a phase selector on the Phono input for enhanced support for older vinyl records recorded in reverse phase. Finally, the Technics SU-G700M2 also benefits from the textured aluminum volume and source selector knobs of the SU-R1000.

Availability expected in October, in silver or black brushed aluminum finish. Indicative price: 2,299 euros.

Reminder of the key characteristics of the Technics SU-G700M2:

• Model: 2.0

• Power: 2 x 70 W at 8 ohms, 2 x 140 W at 4 ohms

• Inputs : 2 coaxial, 2 optical, 2 analog line inputs, 1 Phono input (MM and, new on the SU-G700M2, MC), 1 USB Host type A port and 1 asynchronous USB type-B port

• Outputs: 1 analog line output, an RCA stereo pre-out output, 1 pair of screw terminals

• Pure Direct function

• DSD compatibility 2.8 / 5.6 / 11.2 MHz

• Jeno digital audio circuit (Jitter Elimination and Noise-Shaping Optimization)

• Headphone output: yes

• Other (s): AS²PS (Advanced Speed ​​Silent Power Supply)

• Dimensions ( W x H x D, mm): 430 x 148 x 428 mm

• Weight: 12.6 kg