The final DX4000CL represents a new pinnacle in the DX series, engineered to bridge the gap between closed-back isolation and the expansive soundstage typically reserved for open-back monitors. At its core is a newly developed 40mm hybrid diaphragm made from a hot-pressed composite of paper and carbon fiber. This unique material pairing achieves a delicate balance of lightness and rigidity, allowing for lightning-fast transient response and a remarkably natural, organic tonal balance that remains faithful to the original recording.
To combat the "boxed-in" sound often associated with closed designs, final has implemented a sophisticated Rear Diffuser Array and a custom-tuned Spider-web Diffuser in front of the driver. These components work in tandem with an internal air pressure control system to manage airflow and suppress unwanted resonances. The result is a wider, more three-dimensional soundstage with precise imaging, ensuring that mid-high frequencies remain clear and detailed while the low end remains tight and authoritative without becoming congested.
The physical construction of the DX4000CL is as refined as its acoustic performance, featuring a fiberglass-reinforced resin housing for superior mechanical stability. The exterior is finished in final’s signature premium SHIBO texture, which provides a discreet, matte appearance that is resistant to fingerprints and wear. Designed for long-term comfort, the headphones include plush memory foam earpads wrapped in synthetic leather and come equipped with a high-fidelity, silver-plated oxygen-free copper cable for a transparent and interference-free listening experience.
