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DIDRC (Dynamic Intermodulation Distortion
Reduction Circuitry)
Since the advent of digital audio, signal-to-noise ratios have
i
mproved dramatically. However, the S/N ratio reflects static noise
only, and takes no account of another type of noise that occurs as
the byproduct of sound reproduction—dynamic noise. To reduce
t
his type of noise, Onkyo has developed DIDRC technology for
use in our hi-fi components. Despite being beyond the normal
range of human hearing, frequencies above 100 kHz are
susceptible to clock pulse and other forms of distortion from
d
igital devices. Such distortion in the super-high-frequency range
can generate “beat interference”, which in turn affects the
character or atmosphere of the original sound. By improving
l
inearity and reducing distortion in the super-high-frequency range,
Onkyo’s new DIDRC technology effectively reduces perceptible
n
oise and delivers clearer-than-ever audio.
Separate Digital/Analog Circuitry and Transformers
To prevent unwanted interference, the C-7000R employs
physically separate circuitry for digital and analog processing. In the
same vein, the player also features separate transformers for digital
and analog circuitry.
Thermally Regulated Super-Precision Clock
The C-7000R boasts an extremely precise clocking mechanism
that controls and coordinates the timing of all digital signal
processes—rather like how a conductor directs and coordinates
the individual instruments of an orchestra. The C-7000R uses a
state-of-the-art crystal oscillator that achieves a frequency
deviation of ±1.5 ppm at room temperature—much lower than
with a conventional oscillator. Even in surrounding temperatures
of -30°C or +80°C the frequency remains stable, with only
±0.5 ppm of additional frequency deviation.
PLL (Phase Locked Loop) Ultra-Low Jitter
Technology
Jitter is an unwanted side-effect of the digital-to-analog conversion
process caused by fluctuations in the time domain of a digital
signal. PLL ultra-low jitter technology reduces jitter by comparing
the input and output phases of the digital signal and creating an
accurate clock waveform. This enhances the precision of digital
signal processing and noticeably improves perceived audio quality.
Silent Disc Mechanism with Die-Cast Tray
Affixed to four supports made of rigid machined brass, the
C
-7000R’s CD drive provides excellent resistance to internal
vibrations. Furthermore, the disc tray is precision-engineered from
h
igh-rigidity, die-cast aluminum. Thanks to these advanced design
features, the disc mechanism offers smooth and silent operation.
Separate TI Burr-Brown DACs for L/R Channels
High-quality TI Burr-Brown DACs work to optimize analog audio
performance on the C-7000R. The player incorporates two of TI
B
urr-Brown’s flagship 24-bit PCM1792 DACs. Although these
DACs can process two-channel audio on a single chip, Onkyo
employs separate chips for each stereo channel, to ensure the
m
ost accurate digital-to-analog conversion.
Audiophile-Quality Parts
T
he C-7000R incorporates a massive toroidal transformer for the
analog circuitry that reduces magnetic flux leakage, improves
efficiency, and keeps the power supply stable. For the digital
c
ircuitry, meanwhile, it employs a high-quality EI transformer.
Wide-spaced, gold-plated, machined solid brass terminals ensure a
clean connection and help prevent interference between thick,
high-quality cables. Meanwhile, Amphenol AES/EBU digital outputs
provide resistance to signal degradation and noise.
New Circuit Board Construction
Rather than being directly connected to the chassis base, the
circuit boards inside the C-7000R are cushioned by internal struts
and affixed to the front, side, and rear panels. This method of
construction prevents vibrations from the chassis from adversely
affecting the circuit boards.
Separate Panel Construction
The C-7000R features separate aluminum panels for the top,
sides, and front to reduce unwanted vibrations caused by internal
resonance. Compared to a one-piece chassis design, this
construction method offers greater rigidity and improved noise
reduction.
SPECIFICATIONS
C-7000R Compact Disc Player
Frequency Response 2 Hz–20 kHz
THD (Total Harmonic Distortion)
0.0015%
Signal-to-Noise Ratio 116 dB
Audio Dynamic Range 100 dB
Audio Output/Impedance
Optical -22.5 dBm
Coaxial 0.5 Vp-p/75 Ω
AES/EBU 3.3 Vp-p/110 Ω
Analog 2 V (rms)/330 Ω
General
Power Supply AC 230 V~, 50 Hz
P
ower Consumption 18 W
Dimensions (W x H x D) 435 x 99 x 315.2 mm
Weight 12.0 kg
CARTON
Dimensions (W x H x D) 627 x 250 x 446 mm
W
eight 13.0 kg
Supplied Accessories
• Instruction manual • AC power cord • RCA audio cable
• Remote controller • AA (R03) batteries x 2
Black model available
• Plays Audio CD, CD-R, CD-RW, MP3 CD, and WMA CD*
•
DIDRC (Dynamic Intermodulation Distortion Reduction Circuitry)
•
Separate Digital/Analog Circuitry
• Separate Massive Transformers for Digital and Analog Circuitry
(Toroidal Transformer for Analog Circuitry)
•
Thermally Regulated High-Precision Clock
• Silent Disc Mechanism with Solid Die-Cast Aluminum Tray
•
Separate Anti-Vibration Aluminum Panels for Top, Front, and Sides
• New Circuit Board Construction to Reduce Vibration
• PLL Ultra Low Jitter Technology
• Separate TI Burr-Brown 192 kHz/24-Bit DACs (PCM1792)
f
or L/R Channels
•
Pure Analog Mode
• Pure Digital Mode
• 3 Digital Outputs (Amphenol AES/EBU, Optical, and Coaxial)
•
Wide-Spaced, Gold-Plated, Machined Solid Brass Audio Terminals
•
Display Dimmer (Normal/Dim/Off)
*Discs should be properly finalized.
NPR No. 10N77 11/10
C-7000R_Hi-Fi 10/11/30 14:36 ページ 2