AlphaTheta, a professional DJ audio equipment company, has introduced the HDJ-F9 on-ear wireless headphones. The device utilizes SonicLink 2.4GHz wireless technology, which achieves a low latency of 9ms. Users can pair the headphones with compatible devices using NFC.
The HDJ-F9 features 40mm drivers with a PEEK-PU-PEEK composite diaphragm. The hardware offers an impedance of 32Ω, a frequency response range of 5–30000Hz, and a sensitivity of 106dB. The design includes a dual-chamber structure to reduce noise and a dedicated bass reflex chamber to enhance low-frequency performance.
The construction incorporates die-cast aluminum sliders, silicone head padding, and polyurethane leather ear pads. The headphones feature a rotating mechanism and a locking cable design, allowing for single-ear monitoring and shoulder-rest positioning. The device is also equipped with ARGB LED lighting.
Regarding power, the headphones provide up to 25 hours of battery life via Bluetooth 5.3 and 9 hours using the SonicLink 2.4GHz connection. A full charge takes 2.5 hours, while a 30-minute charge provides 2.5 hours of playback in the SonicLink mode.
