AlphaTheta HDJ-F9 Professional Wireless DJ Headphones
The AlphaTheta HDJ-F9 Professional Wireless DJ Headphones are designed to deliver the sound quality, monitoring accuracy and reliability DJs expect from professional wired headphones, while removing the restrictions of a conventional headphone cable.
At the heart of the HDJ-F9 is AlphaTheta's evolved SonicLink wireless technology, delivering high-quality audio, powerful monitoring volume and ultra-low latency as low as 9 milliseconds.
This extremely low latency makes SonicLink suitable for genuine DJ monitoring, allowing you to mix and even scratch wirelessly without the noticeable delay associated with conventional wireless headphone systems.
A new SonicLink touch pairing function makes connecting to compatible DJ equipment faster than ever. With supported products such as the AlphaTheta DJM-V5, you can establish a SonicLink connection simply by touching the headphones to the supported unit.
For equipment without built-in compatible SonicLink functionality, the separately available AlphaTheta HP-TX01 SonicLink Transmitter provides a way to connect the HDJ-F9 to a wider range of devices.
The headphones are equipped with newly developed 40mm drivers, a bass reflex chamber and a PEEK-PU-PEEK composite film diaphragm to deliver powerful bass response, accurate kick and bassline attack, balanced mids and highs, and low distortion.
Combined with excellent sound isolation for an on-ear headphone, the HDJ-F9 is designed for accurate monitoring even inside loud DJ booths.
Evolved SonicLink Wireless DJ Monitoring
The HDJ-F9 uses AlphaTheta's proprietary SonicLink technology to provide wireless audio with latency as low as 9ms.
This gives DJs the freedom to move around the booth or stage while maintaining the responsive monitoring needed for:
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Beatmatching
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Cueing
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Mixing
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Scratching
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Track preparation
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Live DJ performance
The aim is to provide the freedom of wireless headphones without sacrificing the accurate timing required for professional DJing.
SonicLink Touch Pairing
The HDJ-F9 introduces SonicLink touch pairing.
With compatible DJ equipment, connection can be established simply by touching the headphones to the supported unit.
AlphaTheta specifically identifies the DJM-V5 as an example of compatible DJ equipment supporting this function.
HP-TX01 SonicLink Transmitter Compatible
For other equipment, the separately available AlphaTheta HP-TX01 SonicLink Transmitter enables SonicLink connection with a wider range of devices.
HP-TX01 transmitter is sold separately.
Newly Developed 40mm Drivers
The HDJ-F9 features newly developed 40mm drivers engineered for precise professional monitoring despite the headphones' compact on-ear format.
They deliver powerful, full-bodied low frequencies while maintaining balanced reproduction throughout the mid and high-frequency range.
Bass Reflex Chamber
An integrated bass reflex chamber is designed to reproduce the attack of basslines and kick drums accurately.
This is particularly important for DJs who rely on precise low-frequency information when beatmatching and monitoring inside loud environments.
PEEK-PU-PEEK Composite Film Diaphragm
The driver diaphragm uses a PEEK-PU-PEEK composite film construction.
This helps suppress unwanted vibration and provides balanced mid and high-frequency reproduction with minimal distortion.
High Sound Isolation
The HDJ-F9 achieves a high level of sound isolation compared with other on-ear headphone models.
This helps DJs hear their monitoring clearly in loud booths without needing to increase headphone volume unnecessarily.
Designed for Different DJ Monitoring Styles
The HDJ-F9 is designed to adapt to different ways of monitoring.
Features include:
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Swivel-mounted hangers
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Flexible silicone headband
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Comfortable one-ear monitoring
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Comfortable shoulder-resting position
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Adjustable fit
Whether you monitor with both ears, one ear or frequently move the headphones on and off during a set, the design is intended to remain flexible and comfortable.
Durable Die-Cast Aluminium Slider
The adjustable slider is made from tough die-cast aluminium, helping provide the durability required for regular professional DJ use.
Combined with the flexible headband and swivel construction, this gives the HDJ-F9 a balance of portability, flexibility and long-term durability.
HEADPHONES CONNECT App
The dedicated HEADPHONES CONNECT app provides additional customisation and support features from a compatible smartphone.
Available adjustments include:
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Status LED colour
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Status LED brightness
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Headphone name
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Auto-power-off settings
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Siri settings
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Google Assistant settings
The app can also provide firmware updates, tips and additional support functions.
Find My Headphones
The HEADPHONES CONNECT app includes a Find My Headphones feature.
This allows you to locate the headphones by making them play a sound, providing a useful feature if they have been misplaced nearby.
Multipoint Bluetooth
Bluetooth multipoint pairing enables the HDJ-F9 to remain connected to 2 devices at the same time.
This makes it easier to switch between compatible devices without repeatedly disconnecting and reconnecting the headphones.
Windows Swift Pair
Compatibility with Windows Swift Pair enables quick pairing with compatible Windows devices.
Built-In Microphone
A built-in microphone allows the HDJ-F9 to be used for hands-free phone calls as well as professional DJ monitoring.