At the heart of the headphone is a newly developed 50mm dynamic driver with an aluminum diaphragm. The five-layer composite diaphragm design creates an optimized balance between rigidity and damping, resulting in a clean midrange, well-defined treble, and tight bass. The copper-aluminum alloy voice coil increases efficiency and improves microdynamics, while the dome-shaped multilayer composite structure and a precisely tuned magnetic system convert the electrical signal into natural sound with low distortion. As a result, stability and detail remain intact even at higher volume levels.

The natural wood ear cups are not just visual flair. They play an acoustic role: wood’s inherent resonance properties help damp internal reflections, resulting in a smoother frequency response and a more balanced sound. Because real wood is used, each piece features a slightly different grain pattern, adding subtle uniqueness to every unit.

The lightweight, precision-machined metal frame provides stability while distributing weight evenly across the head. Deep, memory foam velour ear pads fully surround the ears, reduce pressure points, and improve passive noise isolation. Breathable materials remain comfortable during longer listening sessions, while the padded headband offers proper support without excessive clamping force.

The included 1.6m oxygen-free copper (OFC) cable uses low-resistance conductors to minimize signal loss and preserve fine detail. The braided outer jacket improves durability, and the dual 2.5mm connectors ensure stable contact. The detachable design makes maintenance easier and stays practical for long-term use. A 6.35mm adapter is included for direct connection to desktop headphone amplifiers.

The SV021 PRO is tuned for a natural tonal balance. Bass is present but not dominant, the midrange is clean and articulate with vocals brought forward, and treble stays detailed without becoming sharp. Despite the closed-back design, imaging is well-structured and instrument separation is easy to follow, resulting in a coherent, controlled musical experience.

After longer listening, the SV021 PRO’s greatest strength is its cohesive, calm presentation. It does not rely on an instantly flashy V-shaped signature, but gradually reveals its strengths. Bass is tight and controlled, never intrusive, yet it provides the right body for electronic and rock recordings. The midrange is notably clean, vocals sound natural with strong presence, and the texture of guitars and pianos is easy to follow. Treble remains detailed without turning sharp or fatiguing, which is especially valuable during longer sessions.

For a closed-back headphone, imaging is well-organized and instruments remain clearly separated, even if the soundstage width does not aim to rival open-back designs. With a 45-ohm impedance, it is easy to drive from a laptop or portable DAC, yet it benefits noticeably from higher-quality sources, with improved dynamics and finer detail.

The SV021 PRO is a surprisingly mature tuning: it does not try to impress with effects, but builds on balance. The real wood ear cups are not just aesthetic extras, they audibly contribute to a harmonious sound signature, and the comfortable fit supports longer listening sessions without compromise. This is the kind of headphone that does not “wow” in the first minute, but wins you over over hours. Technically solid, musically authentic, and refreshingly, the form truly follows the function. Yes. This is one of those rare cases where the engineering genuinely comes through.

Design

Closed-back, Over-Ear

Driver type

Dynamic

Diaphragm diameter

50mm

Headphones

1 x SV021 PRO closed-back dynamic headphones

Detachable cable

1 x dual 2.5mm to 3.5mm detachable cable

Adapter

1 x 3.5mm (female) to 6.35mm (male) adapter