AlphaTheta HDJ-F9 - Professional On-Ear Wireless DJ Headphones (Black)

No cables. No limits. The AlphaTheta HDJ-F9 is a professional on-ear wireless DJ headphone built around SonicLink, AlphaTheta's ultra-low-latency wireless technology, so you can monitor and mix without being tied to the mixer.

SonicLink: wireless monitoring fast enough for DJing

Standard Bluetooth codecs add roughly 200–300 ms of delay, which makes cueing impossible. SonicLink is rated at just 9 ms. Touch the headphones to a SonicLink-compatible DJ device, such as the DJM-V5, to connect. Devices without SonicLink can be used with the HP-TX01 transmitter (sold separately).

Bluetooth with multipoint

Away from the booth, connect over Bluetooth 5.3 for music and calls. Multipoint support lets you switch between devices, and Google Fast Pair and Windows Swift Pair make pairing quick.

All-day battery

Get up to 9 hours with SonicLink and up to 25 hours with Bluetooth (status LED off). A full charge takes about 2.5 hours, and a 30-minute charge gives about 2.5 hours of SonicLink use.

Built for the booth

• Flexible wear: a swivel mechanism and flexible headband let you wear them on one ear, both ears, or around your shoulders.
• Durable: extendable die-cast aluminum slider, tested against international standards.
• Lockable cable: a bayonet locking connection helps prevent accidental disconnection when you play wired.
• Customizable LEDs: set the LEDs in the HEADPHONES CONNECT app, or turn the status LED off.
• Find My Headphones: locate them or make them play a sound from the app.

Sound

A newly developed 40 mm driver with a composite diaphragm and a bass-reflex chamber delivers punchy, detailed sound, with strong isolation for an on-ear design.

Headphones
Type	Closed, dynamic
Driver	ø40 mm
Frequency response	5 Hz – 30,000 Hz
Impedance	32 Ω
Sensitivity	106 dB
Plug	ø3.5 mm stereo mini
Weight	285 g (10.06 oz)
SonicLink
Frequency band	2.4 GHz
Range	Approx. 15 m (unobstructed)
Latency	9 ms
Bluetooth
Version	5.3 (2.4 GHz), approx. 10 m range
Profiles	A2DP, AVRCP, HSP, HFP
Codecs	SBC, AAC
Pairing	Google Fast Pair, Windows Swift Pair
NFC	ISO/IEC 15693 (Tag)
Battery
Power	DC 5 V (charging), built-in 3.7 V lithium polymer battery
Playback (SonicLink)	Approx. 9 h (status LED off) / 7 h (LED on)
Playback (Bluetooth)	Approx. 25 h (status LED off) / 13 h (LED on)
Charge time	Approx. 2.5 h (at +25 °C)
Microphone	Electret condenser, omni-directional, 100 Hz – 4,000 Hz
Materials	Silicone head cushion, polyurethane ear pads (leather-style finish)
Operating temperature	0 to +40 °C (charging +10 to +35 °C)

- AlphaTheta HDJ-F9 Wireless DJ Headphones