DX-7555
DX-7555
AUDIOPHILE-GRADE CD PLAYER
Available in Gold
Providing Superior Audio Quality through Noise-Free, Accurate Digital Delivery
Your system’s digital front-end is a vital link in the audio reproduction chain. The exacting process of retrieving digital data and converting it
to analog without the influence of digital noise is a key determinant in assessing the class of different playback components. Also, the ability
to control timing inaccuracies ( jitter) is another crucial factor in the quality of audio reproduction of digital sources like CDs and MP3s. The
DX-7555 audiophile-grade CD player has been designed with these considerations in mind. With Onkyo’s Vector Linear Shaping Circuitry (VLSC),
the digital signal is protected from pulse noise, and with a super precision clock, a precise timing reference is maintained. By combining
quality parts like a sophisticated 192 kHz/24-bit DAC with Onkyo’s renowned build quality, the DX-7555 will deliver digital audio sources
with the accuracy they deserve.
Vector Linear Shaping Circuitry (VLSC)
Essentially, a CD player’s primary purpose is to read digital information and
convert that information into an analog signal to feed to a preamplifier. Simple
as it seems, every digital signal is plagued by pulse noise (which is particularly
harmful in compressed formats like MP3). Conventional D/A conversion methods
reduce digital pulse noise at the conversion stage but can’t remove it completely.
Onkyo’s VLSC is a unique digital-to-analog conversion circuit designed to overcome
this problem. Data is converted between the sampling points, and these discrete
sampling points are joined with analog vectors in real-time to produce a smooth
output wave form. This ensures that the DX-7555’s analog output is delivered
as accurately as possible.
Super Precision Clock for Superior Audio Performance
The DX-7555 boasts an extremely precise clocking mechanism to control and
coordinate the timing of all digital signal processes. If you think of the clock as
an orchestra conductor, then the separate digital signals are the individual
instruments in that orchestra. Without a talented conductor—an accurate clock—
sound quality is degraded. That means you’ll get a harsh treble, a smaller
soundstage and music that sounds synthetic. The DX-7555’s state-of-the-art
crystal oscillator achieves a frequency deviation of just ±1.5 ppm, compared
with ±50 ppm on a conventional crystal oscillator. The difference is crystal
clear: a stunningly realistic sound field and a beautifully sustained tone for all
musical instruments.
Wolfson® Microelectronics 192 kHz/24-bit Stereo DAC
The DX-7555 features a Wolfson Microelectronics 192 kHz/24-bit stereo DAC
(WM8740) designed for digital audio applications. This DAC supports an input
data word length from 16 to 24 bits and sampling rates up to 192 kHz. The
DAC consists of a serial interface port, digital interpolation filter, multi-bit sigma
delta modulator and stereo DAC in a small 28-pin SSOP package. It also
includes a digitally controllable mute and attenuator function on each channel.
The DAC’s internal digital filter enables two selectable roll-off characteristics:
sharp or slow.
Selectable Control for Digital Filter, Phase Control and Clock
The DX-7555 gives you a variety of selectable options that give you greater
control over audio playback. For the digital filter, you can select sharp roll-off
(enables a flat response up to 20 kHz) or slow roll-off (enables the tempo to be
modified for full sound imaging). It is also possible to select from two analog
output phases: Normal phase, where the recorded waveform is output with
polarity intact; and Reverse phase, where the recorded waveform is output with
polarity reversed. Finally, the DX-7555 also gives you the capability to increase
or to decrease the clock frequency to improve sound imaging. If you make no
adjustments, the DX-7555 uses its factory default settings.
Quick Navigation for MP3 CD Playback
Various preferences can be selected to help you easily find and playback MP3
contents burnt to CD-R and CD-RW. In Group mode, you can select a folder
than select the MP3 track from that folder. In Navigation mode, you can select
MP3 tracks by moving through the folder hierarchy. You can use the search
button on the remote controller to select MP3 tracks and folders by number.
Quick navigation helps you to easily locate and to playback when you have
multiple music sources recorded to one disc.
Exclusive Direct Digital Path
Unlike other CD players that use PC-board copper traces to transfer the digital
audio signal, the DX-7555 employs a high-purity, heavy-gauge, shielded cable
to directly output the digital bitstream straight from the disc to the back panel.
The result is a noise-free digital audio signal that is less susceptible to flux.
High-Grade Build Quality
The DX-7555 is constructed so that unwanted noise and vibrations won’t taint
your delicate audio signal. A high-rigidity, anti-resonant chassis prevents the
possibility of noise being picked up from external surfaces. Instead of opting for
cheap alternatives, Onkyo has chosen an aluminum front panel to enhance the
DX-7555’s solid appearance. It also gives the DX-7555 a dependable feel that
reflects the engineering quality lacking in today’s CD players.
DX-7555
AUDIOPHILE-GRADE CD PLAYER
Features
SPECIFICATIONS
• Plays audio CDs, MP3 CDs, CD-R/CD-RWs*
• Vector Linear Shaping Circuitry (VLSC)
• Super precision clock (±1.5 ppm)
• Selectable control for digital filter, phase control and clock
• Massive power transformer
• Wolfson® Microelectronics 192 kHz/24-bit DAC
• Direct Digital Path
• 2 Digital outputs (Optical/Coaxial)
• Headphone jack with volume control
• Quick navigation for MP3 CD playback
• 25-step memory playback and 4 repeat modes
• 4-mode dimmer
• Ultra-smooth CD loading mechanism
• High-rigidity, anti-resonant chassis
• Brushed aluminum front panel
• RI (Remote Interactive) system compatible
• Remote control
Digital (Optical) .......................................................................... - 22.5 dBm
Digital (Coaxial) .......................................................................... 0.575 Vp-p/75 Ω
Analog ........................................................................................ 2.0 V (rms)/470 Ω
GENERAL
Power Supply ............................................................................... AC 220-230 V, 50/60 Hz
Power Consumption .................................................................... 14 W
Standby Power Consumption .................................................... 0.2 W
Dimensions (W x H x D) ............................................................ 435 x 111 x 405 mm
Weight ........................................................................................... 8.0 kg
Remote Control
NPR No. 05N60 11/05 Printed in Japan
*Discs that have not been properly finalized may only be partially
playable or not playable at all.
Frequency Response .................................................................. 2 Hz-20 kHz
Total Harmonic Distortion.......................................................... 0.0027 %
Audio Dynamic Range ................................................................ 100 dB
Signal-to-Noise Ratio ................................................................. 111 dB
Audio Output
Due to a policy of continuous product improvement, Onkyo reserves the right to change specifications and appearance without notice.
“VLSC”is a trademark of Onkyo Corporation. All other trademarks and registered trademarks are the property of their respective holders.
Onkyo Corporation 2-1 Nisshin-cho, Neyagawa-shi, OSAKA 572-8540, JAPAN Tel: +81-72-831-8136 Fax: +81-72-833-5222 http://www.onkyo.com/
Onkyo China Limited Units 2102-2107, Metroplaza Tower I, 223 Hing Fong Road, Kwai Chung, N. T., HONG KONG, SAR of China Tel: +852-2429-3118 Fax: +852-2428-9039 http://www.ch.onkyo.com/
Onkyo U.S.A. Corporation 18 Park Way, Upper Saddle River, N.J. 07458, U.S.A. Tel: +1-201-785-2600 Fax: +1-201-785-2650 http://www.onkyousa.com/
Onkyo Europe Electronics GmbH Liegnitzerstrasse 6, 82194 Grobenzell, GERMANY Tel: +49-8142-4401-0 Fax: +49-8142-4401-555 http://www.eu.onkyo.com/
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