VCXO high-precision clock
A newly designed high-precision clock is implemented to achieve the highest level of sound quality for an all-in-one digital player. A VCXO (voltage controlled crystal oscillator) of +/- 0.5 ppm (*2) that uses a large crystal is deployed in the K-03, which is
very advantageous for advanced sound quality.
Additionally, a stabilized power supply circuit improves the stability of clock circuit operation. When using the K-01 without using an external WORD clock, the high precision audio clock sync signal generated by the VCXO is directly delivered to the D/A converter, without passing through the PLL circuit. This enables higher-quality reproduction that is a step ahead of standard designs. This also substantially reduces any audible jitter when transmitting audio signals to achieve high-speed and high-quality reproduction inclusive of a very dramatic presence and acoustic delicacy.
(*2) Factory setting
WORD sync function enabling synchronization with external devices
The K-03 has a WORD sync function to synchronize with an external WORD clock. This allows upgrading to a higher-quality sound system by connecting the unit to a high-precision master clock generator, such as the G-0Rb rubidium master clock. As for supported clock sync frequencies, 10 MHz is newly supported in addition to 44.1/88.2/176.4 kHz.
32-bit precision digital attenuator function
This function enables 32-bit digital processing and a high-precision volume control, capitalizing on the 32-bit D/A devices. 32 bits gives an allowance of 8 bits over the standard 24 bits, and enables control of volume with no degradation of sound quality due to dropouts.
Excellent usability
The output voltage of the XLR audio outputs can be switched according to the input sensitivity of the amplifier that you connect to the K-03 (0dB/ +6dB). You can also choose Hot 2 or Hot 3 for the XLR pin assignment. Additionally, you can switch the analog output between RCA, XLR and OFF, as desired based on connected components. The K-03 features one coaxial digital output to support digital output of CDs, and a pass-thru output for an externally input signal; however, digital outputs for SACDs (DSD data streams), and the signal after the D/D conversion are not supported. For noise reduction purposes, it is possible to switch the circuit off when not using the digital output.
Chassis construction with a separate compartment for each circuit block
A chassis construction with separate circuit block compartments packs the design concept of separate SACD/CD transports and D/A converters into an all-in-one unit. This helps to eliminate cross contamination between adjoining circuits. The large-mass VRDS-NEO transport mechanism is positioned in the center of the unit, directly attached to the 5 mm steel bottom chassis, and supported at three points by ESOTERIC’s proprietary pinpoint feet (Patent No. 4075477). This 3 point system effectively suppresses the vibration of the rotation mechanism with large inertia to ensure a highly solid base, free from vibrations and resonance.
The interior of the K-03 chassis has a double-decker structure with five compartments. Each circuit block is contained within its own compartment to minimize conflicts between circuits. Two separate audio boards for each channel are mounted on the rear part of the upper compartment, which is nearest to the rear terminals, to ensure the shortest signal path. The audio power circuit and power transformers are isolated from the audio board by an internal steel chassis plate, and hung inside the compartment on the bottom of the audio board. Such a three-dimensional layout allows the shortest wiring possible for the power supply, and minimizes any impact of magnetic flux leakage and vibration.
The K-03 features two large-capacity toroidal transformers, including one specifically for the built-in dual mono D/A converters and the audio circuits, and the other for driving the digital circuit and mechanism. This design provides dedicated power supply capability to all circuit blocks without interference.
The K-03’s large mass of approximately 28 kg (61.8 lbs), is the result of ESOTERIC’s commitment to the highest quality for component isolation and compartmentalizing. These designs virtually eliminate resonance and vibrations from adjacent electrical and mechanical components.
Beautiful rounded form
The K-03 inherits its appearance from the design of ESOTERIC’s flagship line of separate digital players and DACs, with the front/side/top panels made of thick aluminum and a rounded form with no screws on the top panel and corners. This form is sure to give you a feel of elegance and pleasure of ownership, in addition to eliminating any unwanted vibrations that are well known from top and corner screw designs.
Feel the high-end touch with a leather finished remote control
The K-03 comes with a remote control unit that is finished in leather and has an aluminum body with just the right weight.
The ease of use and accuracy associated with this remote control is also based on ESOTERIC's "P series" system designs.
