K-07X Super Audio CD Player


A New to extremity.

There are areas to what beyond a line can reach. The conviction, was driven to the development of a new integrated digital players. Pour the essence of the flagship model Grandioso, technology and the amount and the K-07X · K-07X that did my wisdom.

The excitement of music without stress, I want to tell the truth. To achieve a solid Philosophy and revamped all audio electronics circuits. Of two of the discharge for any compromise “X”, now, to renew the lineage of esoteric.


VOSP* Mechanism With Axial Sliding Pickup

Esotericˇs unique VOSP* mechanism employs the same axial sliding pick-up assembly used in our premier Grandioso line of high-end SACD players. As the pickup lens moves, the laser beam maintains an ultra-precise perpendicular optical axis orientation relative to the disk surface, ensuring highly accurate reading of audio data. The VOSP mechanism is rigidly held by a robust steel plate and an 8mm-thick large-diameter steel stabilizer for superior anti-resonance and anti-vibration properties.
*VOSP = Vertically-aligned Optical Stability Platform.

Refined Dual Mono D/A Converters Derived From Top-of-the-Line Components

FEAT-K-07X_techThe D/A converter’s analog output circuitry features both excellent high-end resolution and natural musical texturing that only high-end components such as  Esoteric’s K Series SACD players can offer. Centered around Asahi Kasei’s high-end AK4490* 32-bit DAC, this circuitry accentuates the expressive power of these players with 4 parallel/differential circuits and 8 outputs driving each channel—twice that of conventional players in terms of circuit scale—to further enhance sound quality with excellent linearity and low distortion.

 Arranged in a discreet dual mono configuration, the D/A converters and analog output circuitry are laid out in parallel on either side of the board, and are completely isolated from the digital signal processing circuitry, achieving superb channel separation.
Technology developed for the Grandioso C1 Linestage Preamplifier is also employed in the power supply, which features EDLC (Electronic Double-Layer Capacitors). This regulated power supply boasts an astounding total capacity of 500,000μF per channel for exceptional low-frequency sound reproduction.

34-Bit D/A Processing Achieves Outstanding Powers of Musical Expression

Employing a 34-bit D/A processing algorithm with an encoding resolution that is an astounding 1,024 times greater than that of 24-bit encoding, multiple 32-bit DAC devices were combined to convert the high-resolution 34-bit PCM signal to analog. In the digital range, full advantage is taken of high-bit data gradation to minimize calculation errors and provide faithful conversion to analog, thereby attaining outstanding powers of expression with even extremely small music signals.

Proprietary Esoteric-HCLD* Type 2 Current -Enhancing Output Buffer Circuit

 Playing a critical role in the superb sound quality achieved by these new ‘X’ version SACD players, further improvements were also made to their analog output circuitry. Providing excellent current transmission capability as well as a strong drive output, both players now employ Esoteric-HCLD* Type 2 buffer amplifier circuitry like that first used in such high-end models as our C1 Linestage Preamplifier. Two of these buffer circuits are installed per channel and configured differentially to drive the XLR outputs, and in parallel to drive the RCA outputs. By transmitting the wide dynamic range of the musical signal in its entirety and providing a strong drive to connected equipment, the full dynamism of music is recreated with a sense of realism that will take your breath away.

High-Speed, Large-Capacity Power Supply

FEAT-K-07X_tech3The K-05X is equipped with a large, high-efficiency, high-powered toroidal transformer, while the K-07X uses a full-sized EI-core transformer. Each is custom-designed to ensure excellent sound quality. High-output power supply circuitry further combines with an array of large capacitors to provide clean and steady power to all circuit blocks.

High-Precision VCXO Clock

FEAT-K-07X_tech4A high-precision VCXO (voltage controlled crystal oscillator) supplies a highly accurate reference clock signal to the digital circuitry. The K-05X’s large, custom-designed VCXO was jointly developed with Nihon Dempa Kogyo (NDK), a leading manufacturer of crystal oscillators. Incorporating an unusually large crystal element, this VCXO realizes both excellent center accuracy (±0.5ppm*) and extremely low levels of phase noise to ensure exceptional sound playback quality.

External Clock Sync Function

Connecting the unit to a high-precision master clock generator (G-01, G-02) allows synchronization of the unit’s operation with an external clock signal, thereby enabling an upgrade of system sound quality. Compatible with 44.1/88.2/176.4kHz input frequencies, both 10MHz and 22MHz direct master clock linkage* and external clock synchronization are also supported for both digital optical and digital coaxial inputs, as well as when the USB input is used.

Compatible disc types
Playback Super Audio CD, CD (including CD-R and CD-RW)
Analog Audio Outputs
Connectors XLR connector (2ch) ×1
RCA connector (2ch) ×1
Output impedance XLR: 20 Ohms
RCA: 20 Ohms
Maximum output level (1 kHz, full-scale, into 10k Ohms) XLR (set to 0dB): 5 Vrms
RCA: 2.5 Vrms
Frequency response 5 Hz to 70 kHz (- 3 dB)
S/N ratio 117dB
Total harmonic distortion 0.007% (1 kHz)
Digital Audio Output
Optical digital connector x 1 -15 to -21 dBm
RCA connector ×1 0.5 Vp-p (into 75 Ohms)
USB-B port USB 2.0 standard
Digital Audio Input
RCA connector ×1 (input impedance 75 Ohms) 0.5 Vp-p
Optical digital connector ×1 -24.0 to -14.5dBm peak
USB-B connector USB 2.0 standard
Clock Sync Input Format
Connector BNC
Supported input frequencies (±15ppm) CD/SACD:
44.1, 48, 88.2, 96, 176.4, 192, kHz, 10/22.5792/24.576 MHz
Input impedance 75 Ohms
Input level Rectangle wave: equivalent to TTL levels; Sine wave: 0.5 to 1.0 Vrms (50 to 75 Ohms)
Power supply AC 230V, 50Hz
AC 120V, 60Hz
AC 220V, 60Hz
Power consumption 23W
External dimensions
(W x H x D, including protrusions)
445 mm x 131 mm x 355 mm
(17 5/8″ x 5 1/4″ x 14″)
Weight approx. 14 kg (30 7/8 lb)
Included accessories
Power cord set x 1; Remote control (RC-1251) x 1; Batteries for remote control (AA) x 2; Owner’s manual x 1; Warranty card x 1