Technics SU-G700K Digital Integrated Amplifier (Black)

Model: SU-G700-K UPC: 885170368132 Item: 175065

Product Information

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 realizes 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 optimizing 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 optimization 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 stabilizing 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 stabilize 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.

Digital Noise Isolation Architecture

For the PC input terminals, the amplifier uses power conditioners with non-magnetic carbon film resistors that provide strong protection against magnetic distortion, and high-quality ruby mica capacitors featuring excellent characteristics such as low dielectric loss, high voltage resistance, and temperature stability. Sound reproduction with greater purity was pursued by blocking the incursion of outside noise.

Three-section Configuration

In integrated amplifiers, there are a variety of circuits, including circuits that handle the micro-signals of inputs and those that handle a large current, such as output circuits and power-supply circuits. The SU-G700 uses a three-section construction with partitions installed between the circuit blocks according to the signal level handled. This eliminates interference between circuit blocks, thus achieving clear sound quality. Also, the chassis rigidity due to this construction suppresses the vibration of electrical parts, thereby suppressing deterioration in sound quality.

Optimally Activated Circuit System

The Optimally Activated Circuit System allows the operation of various digital modules to be stopped – such as those used for display, analog and digital interfaces – to minimize the noise generated when music is playing.

Battery Driven Clock Generator

The best power supply for delicate circuitry such as the clock generator in new amplifiers is one entirely isolated from any noise or fluctuations in the mains supply. Technics has extensive experience in power supply isolation using batteries. This technology creates ultra-low-noise pre-amplifier stages.

High-quality Analogue Circuit

Analog input is converted with high precision to a digital signal by the high-quality 192-kHz/24-bit A/D converter [Burr-Brown PCM1804 (Texas Instruments)], so the high-purity sound reproduction capability of the full-digital system can be maximized in playing back analog sources. High-definition switching relays are used for signal switching.

Low-noise PHONO Input

The PHONO input achieves low noise by using a differential parallel connection configuration of a first-stage, low-noise FET. In addition, four-level gain adjustment enables selection of the best gain according to the cartridge output. This enables optimal playback of high-grade analog recorded sound sources tailored to the user's environment.

Class AA Headphone Amplifier

The SU-G700 uses a Class AA headphone amplifier with separate amplifier circuits for voltage amplification and current amplification of the audio signal. The voltage is amplified by a high-grade operational amplifier, the current is amplified by an operational amplifier with high current-supply capability, and the high-grade PWM signal output from the JENO Engine is converted to analog with high precision, thus enabling headphones to be ideally driven. This makes it possible to reproduce music with low distortion and a wide frequency range no matter what the load impedance of the headphones is.

High-rigidity Aluminium Cabinet

The High-rigidity Metal Double Chassis features a steel-plate inner chassis and a steel-plate outer chassis to reduce vibration and noise that degrade the purity of sound.

To support heavy parts and components and lower the center of gravity for improved stability, the inner chassis is made of a 1.2-mm-thick plate. The bottom surface of the cabinet is a 2-mm-thick steel plate. This improves the vibration damping performance and achieves a low center of gravity. The front panel is made of a 7-mm thick aluminum plate to resist the effects of electromagnetic noise.

Specifications

Specifications

  • FTC 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:
    • DSDYes (2.8224 MHz, 5.6448 MHz, 11.2896 MHz)
    • PCMYes (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): 16 15/16" x 5 13/16" x 16 27/32"
  • Weight: 27.2 lbs

What's in the Box

What's in the Box

  • Amplifier
  • Remote Control
  • AC Cord
  • Owner's Manual

Reviews

Customer Reviews for Technics SU-G700K Digital Integrated Amplifier (Black)

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Rated 5 out of 5
Technics Gets Serious about HiFi Again !!!
Bought this from World Wide Stereo online and can not be happier. I wanted a second system in my home (my prize system with its McIntosh and REL subs, et al is in my man cave), that I felt would feed my audiophile addiction and I began to search for integrated amps in the 2-3 K range--well, it's crowded at that price points from NAD to ROTEL to ARCAM, you have a plethora of choices.

Anyway, I began looking at specs, reviews, and information and I chanced upon an overview by WWW staffers on the SU-G700 and narrowed down the field.

This Technics has so much nice tech in it and is built so well, it's hard to believe that it only costs $2,500. Listen, that's a lot of $$$ for sure, but, pure music is hard to come by. It handles itself well with more expensive amps, but caution: it's max 140 watts per channel at 4ohms means it won't handle large towers speakers, but paired with mid-sized KEFs or Monitor Audio 100s, this will work wonders.

I have this unit paired presently with KEF LS50s, a REL sub and it is sweet, pure clean sound. The ease of use, the simplicity, and the quiet, neutral soundstage makes it a winner. I tried to do it justice by pairing it with an upgraded Planar 3 w/ Exact cartridge and a Cambridge DAC CD player. The classic VU meters are fun, but not the reason I bought this unit--the fact that they can be manually dimmed or turned off is a nice feature too.

I also purchased an AudioEngine BT receiver from WWW (about $190) and installed it through the optical cable link. I am glad Technics didn't build one in: Wireless tech keeps expanding and this keeps the unit flexible for future growth.

Finally, World Wide Stereo is a pleasure to deal with. They ship most products free and it is delivered within 2 days in most instances. They provide support after purchase and are knowledgeable.

It's a total WIN WIN WIN.....A+.
February 28, 2021

Q&A

Customer Q & A

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Why did you choose this?
World Wide Stereo Store
looks cool and I like class d amps and heard good reviews on it.
David R on Nov 17, 2020
looks cool and I like class d amps and heard good reviews on it.
David R on Nov 17, 2020
When is going to be available?
Milton on Oct 26, 2020
  Please call us at 866.961.7781. Out product specialists are here to assist with questions on pricing and availability. Thanks.
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