Portable Audio Player
Portable Audio Player
High-end components
Premium components for exceptional sound
Featuring a range of premium-grade audio components, the ZX900 brings flagship-inspired sound performance to every listening session.
Oxygen-free copper (OFC) Rear Chassis
The OFC rear chassis provides an impressive foundation for stable, premium quality sound, and resistance from noise and interference. Enjoy clear, powerful bass, an expansive soundstage, and detailed mid to treble frequencies for a beautiful, lingering resonance.
Milled aluminium frame
An aluminium alloy frame provides a highly rigid case that’s resistive to electrical noise and other interference for stable, high quality sound.
Faithful sound reproduction
S-Master™ HX digital amp technology, independently developed for Walkman®, is compatible with the Native DSD format, and supports balanced and high power output.
Furthermore, we have developed an advanced look-ahead noise shaper that predicts and responds to quantization noise in advance, thereby improving D/A conversion performance. It responds quickly to sudden changes in sound, producing powerful, energetic bass and clear, fast sound.
Ultra-low noise LDO regulator
A high-current power IC ensures stable power supply, enabling the S‑Master to perform at its full potential. This eliminates switching noise and interference, delivering clear, powerful audio quality with music signals produced by the high-definition power supply.
Large solid high polymer capacitor
Adopted as battery assist for the amplifier block, the newly developed large solid high polymer capacitor offers large capacitance and low resistance. Able to instantaneously supply large amounts of power, it can accurately output signals by preventing sudden falls in voltage. This contributes to clear, powerful and accurate bass sound, as well as clear vocals.
FT CAP3 (High polymer capacitor)
Custom-made for Sony and tuned by Sony engineers, FT CAP3 is adopted for all bypass capacitors in the audio block power supply. Drawing on know-how cultivated in high-end home audio development, they help to improve sound expression and create a smoother sound, with a wider sound space, more transparency, and tighter bass.
Large coil for balanced output
To supply the optimum balanced output signal from the digital amp, a larger, 8mm coil is used as the L-C filter. By incorporating flat conductive wire, we've achieved lower distortion and lower resistance, which creates an improved sound resolution across all frequencies.
OFC (Oxygen-Free Copper) milled block
An OFC (Oxygen-Free Copper) milled block covers the digital block, helping both to strengthen digital ground and improve noise shielding from digital block elements such as the application processor and memory devices. The result is a clearer sound that appears to rise up from silence.
Crystal oscillators
For the first time in the ZX series, and adopted from our WM1 series, two compact low-phase-noise crystal oscillators ensure precision clock stability at sampling rate multiples of 44.1kHz and 48kHz. The gold vapour deposition used in the crystal electrode results in clearer instrumental separation, helping to reduce noise and resulting in accurate and open sound reproduction.
Film Capacitors
High quality film capacitors deliver voltage with a linear response across frequencies, resulting in reduced distortion and noise.
High polymer capacitors
The stronger power supply provided by the high polymer capacitors enhance low-range reproduction performance creating a more expansive listening experience.
OFC Cable
The low-resistance Oxygen-Free Copper (OFC) cable is used for internal headphone connection, offering low distortion and superior channel separation.
Fine Sound Resistor
The surface mounted Fine Sound Resistor ensures even, effective distribution of power resulting in consistent sound quality.
High quality solder containing gold
The exceptional conductivity of gold ensures absolute minimum signal loss. For clearer sound and vocals, a premium, audio-grade lead-free solder with a small amount of gold connects the circuits of the ZX900 series to the battery.
Reflow solder containing gold
Just like previous acclaimed premium Walkman models, the ZX900 uses reflow solder containing gold, and it features extensively across the circuit board surface - so the overall effect is significant, including improved sound localisation and a wider sound space.
Low dielectric circuit board and filled via
The printed circuit board uses 10 layers of low dielectric materials to ensure accurate signal transmission, while the via holes are filled with copper to further reduce impedance. The result is a wide sound space with clear, bright sound.
[A] Normal via [B] Filled via
Optimised circuit board layout
By dividing the Audio block (highlighted in red) and the Power/Digital block (in blue), the circuit board layout has been optimised to ensure sound quality is unaffected by digital interference.
Balanced connection
The ZX900 features a balanced plug, designed for the Ø4.4mm balanced connection cable. This separates left and right sound signals, while minimising signal transmission loss and resulting deterioration.
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NW-ZX900