Grand Class, High-quality Sound Design
Premium High-grade D/A Converter and Dual Mono
Construction D/A Circuit
For analogue audio output, the D/A circuit is one of the
most important circuit blocks since it recreates the original analogue waveform
from a digital source, such as a CD. For the D/A converters, Asahi Kasei
Microdevices' top-of-the-line DAC AK4497, with their high S/N ratio and low
distortion, are isolated for the left and right channels. The power supply for
the D/A converters is separated into five sections according to the
application, and supplied individually. The power supply for the clock employs
an original Battery Driven Circuit System to achieve high-accuracy D/A
conversion. The Dual Mono Construction and symmetrical layout eliminate mutual
interference between left and right channels, taking the reproduction of sound
imaging and sound space recorded in the source to a higher dimension.
Discrete AMP Module
For analogue audio output, the filter circuit located after
the D/A conversion determines the quality of the sound. The SL-G700's filter
circuit incorporates not an operation amp IC but an amp module of original
discrete construction. The use of low-noise transistors and thin-film resistors
suppresses the noise generated inside the circuits. Detailed fine tuning, such
as the increase of operating current, has improved the response, S/N ratio and
distortion rate. As result, the SL-G700 provides highly linear and faithful
sound reproduction without omitting even the smallest nuances recorded in the
High-speed Silent Hybrid Power Supply
The quality of the power supply is extremely important for
high-fidelity sound reproduction. Power supply noise and supply stability
directly affect the quality of sound reproduced from audio signals,
particularly for analogue audio output. The SL-G700 is equipped with a
dedicated power supply unit for analogue audio output. Its non-feedback
switching power supply suppresses switching frequency fluctuation. Combined
with the original stabilized power supply circuit, this dedicated power supply
unit provides stable power with low noise. The discrete circuit structure does
not use any general-purpose ICs but a discrete layout and meticulous tuning
provides power optimized for analogue circuits, thus realizing a high S/N ratio
and superb reproduction, the hallmark of Technics sound.
Battery Driven Clock Generator
In the processing of digital audio signals, the quality of
the clock affects the sound quality to a large extent. The best power supply
for delicate circuitry such as the clock block in the DAC and the audio system
clock circuit is one entirely isolated from any noise or fluctuations in the
mains supply. Technics has extensive experience in isolating the power supply
using a battery. This technology creates ultra-low-noise digital audio
interfaces including D/A convertors. Additionally, the audio system clock is
supplied from an Ultra-Low Jitter Clock Generator. A low-noise power supply and
a high-quality clock circuit realize a sound with highest transparency.
Digital Noise Isolation Architecture
For the USB input terminals, the amplifier includes power
conditioners using non-magnetic carbon film resistors with strong protection
against magnetic distortion and using capacitors of high-quality ruby mica,
excellent in characteristics such as low dielectric loss, high voltage
resistance and temperature stability.
In addition, high reproducibility of sound is pursued by various noise
countermeasures, such as the installation of a low ESR film capacitor to the
LAN terminal power supply and isolation by a pulse transformer in the digital
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,
analogue and digital interfaces – to minimize the noise generated when music is
High-quality Headphone Output
Generally, the analogue output signal (Balanced/Unbalanced)
and headphone output signal are generated by the same D/A circuit. The SL-G700
is equipped with a dedicated D/A circuit for headphones which is independent
from that for analogue output. This circuitry incorporates Technics' original
sound processing LSI, the JENO Engine (Jitter Elimination and Noise-shaping Optimization).
Complete separation of the analogue output from the headphone output has
eliminated the mutual interference between the two circuits that serve
different purposes. In addition, each circuit has received the most suitable
sound tuning. As a result, both outputs provide maximum performance.
Furthermore, the SL-G700 is equipped with an operation optimization system that
automatically turns on the JENO Engine when a pair of headphones is connected.
This eliminates the adverse effect of the analogue output on the sound quality
when headphones are not connected.
What’s more, the Class AA system headphone amp uses separate amp circuits for
the audio signal voltage amplification and current amplification. The
high-grade operation amp amplifies voltage, and the separate operation amp with
high power supply capacity amplifies current. This enables high-precision
conversion of the high-resolution PWM signal output from the JENO Engine to an
analogue signal. Achieving ideal drive of headphones with a wide range of load
impedance, it delivers low-distortion sound across a broad frequency range.
Covers Most of the Digital Audio Media Available Today
Supports a Wide Variety of Music Sources and High
The SL-G700 supports Bluetooth, Wi-Fi, and Apple AirPlay2
with its high wireless connectivity. It is also compatible with streaming
services, such as Spotify, TIDAL, and Internet Radio, and functions such as
Google Chromecast and Google Assistant.*
*A Google Voice-activated Speaker must be included in the
Equipped with an MQA decoder. When the MQA decoder is turned
on, MQA files and MQA-CD are fully decoded for playback.
DSD Native Playback
Performs the D/A conversion process for the DSD signal in
the SACD recording format without converting it to a PCM signal, thus
delivering the full potential of the DSD signal.
Equipped with a dedicated SACD/CD playback mode. In this
mode, all power supplies except those to the circuit blocks necessary for
SACD/CD playback are shut off, thus improving the quality of sound from the
Digital signal processing capable of expanding the bandwidth
and bit depth can convert 44.1-kHz/16-bit music data recorded on CDs and lossy
compression audio sources such as MP3 to high-res signals of up to 192 kHz/32
bits. When used together with the latest audio devices familiar music sounds
richer, with enhanced quality allowing you to experience newly discovered
High-quality Technics Design
A digital audio player has a variety of circuits, such as a
switching power supply, which has high energy, and a digital interface circuit,
which handles high-frequency signals, and also analogue circuits.
The SL-G700 uses a four-section construction with partitions installed between
the circuit blocks according to the signal level handled and circuit type.
This eliminates interference between circuit blocks, thus achieving clear sound
quality. The chassis rigidity due to this construction also suppresses the
vibration of electrical parts, thereby suppressing any deterioration in sound
High Rigidity Drive Mechanism
In the playback of a disc, the reading accuracy
determines the sound quality. The CD drive mechanism features a triple chassis
structure to ensure accurate reading and to prevent the vibration from
transmitting to the outside of the mechanism. Moreover, the SL-G700 has a
stable, aluminum die-cast disc tray with a high-vibration-damping, quiet
structure to ensure high-accuracy disc playback.