AlphaTheta HDJ-F9 Wireless DJ Headphones

AlphaTheta HDJ-F9 Wireless DJ Headphones - Black on Silver

The AlphaTheta HDJ-F9 professional wireless DJ headphones combine freedom of movement with precise audio monitoring. Featuring SonicLink technology with ultra-low latency of just 9 ms, these headphones let DJs monitor mixes and perform with greater flexibility.

The newly developed 40 mm drivers, bass-reflex chambers, and composite diaphragms deliver powerful low frequencies with balanced mids and highs. Bluetooth 5.3 with multipoint connectivity makes them suitable for everyday listening, while the included coiled cable supports wired DJ monitoring.

Designed for demanding DJ environments, the HDJ-F9 features a flexible headband, swivel mechanism, durable aluminum slider, and secure cable connection.

Newly developed 40 mm driver

• Hear rich, well-defined bass that reaches down to the sub-bass range.
• A PEEK-PU-PEEK composite diaphragm, combining 2 different materials, suppresses unwanted vibration for distortion-free, well-balanced mid-to-high frequencies.

Outstanding sound insulation

• An optimized internal structure reduces external noise, achieving outstanding sound insulation for an on-ear headphone.
• You can monitor your music comfortably without needing to push the volume too high, reducing strain on your ears.

Bass-reflex chamber

• The bass-reflex chamber (air chamber) at the top of the housing improves low-frequency response, reproducing the crisp, punchy kick sound that’s ideal for monitoring.

Key Features

• SonicLink wireless technology with approximately 9 ms latency
• Bluetooth 5.3 with multipoint connectivity
• Newly developed 40 mm drivers
• Frequency response: 5 Hz–30 kHz
• Impedance: 32 ohms
• Sensitivity: 106 dB
• Up to 9 hours of SonicLink playback with status LED off
• Up to 25 hours of Bluetooth playback with status LED off
• USB-C charging with approximately 2.5-hour full charge
• Lightweight design at approximately 285 g without cable
• Included 1.2 m coiled cable and 6.3 mm adapter
• Built-in microphone for hands-free calls

Specifications

General

• Power: DC 5 V (when charging), DC 3.7 V (built-in rechargeable lithium polymer battery)
• Playback time (in SonicLink mode) *1: When the Status LED is off: Approximately 9 hours
  When the Status LED is lit up: Approximately 7 hours
• Playback time (in Bluetooth mode) *1: When the Status LED is off: Approximately 25 hours
  When the Status LED is lit up: Approximately 13 hours
• Charging time *2 (+25 °C (+77 °F)): Approximately 2.5 hours
• Recommended charging temperature range: +10 °C – +35 °C (+50 °F – +95 °F)
• Usable temperature range: 0 °C – +40°C (+32 °F – +104 °F)
• Usable humidity range: 35 % RH – 80 % RH (with no condensation)
• Weight: 285 g (10.06 oz)

*1 The volume, input music, etc., may vary depending on the conditions of use.
*2 Time required to fully charge from an empty state. Charging time may vary depending on the conditions of use.

Bluetooth

• Version: Bluetooth Specification Ver. 5.3
• Maximum transmission distance: Approximately 10 m *3 in unobstructed circumstances
• Frequency band used: 2.4 GHz
• Compatible Bluetooth profiles: A2DP, AVRCP, HSP, HFP
• Compatible codecs: SBC, AAC
• Pairing method: Supports Google Fast Pair and Windows Swift Pair

*3 The transmission distance may change depending on the connected device and the surrounding environment.

SonicLink

• Maximum transmission distance: Approximately 15 m *4 in unobstructed circumstances
• Frequency band used: 2.4 GHz

*4 The transmission distance may change depending on the connected device and the surrounding environment.

Headphones section

• Type: Closed, dynamic
• Impedance: 32 Ω
• Sensitivity: 106 dB
• Frequency response: 5 Hz – 30 000 Hz
• Driver units: ø40 mm (ø1.57")
• Plug: ø3.5 mm stereo mini plug

NFC section

• Supported standards: ISO/IEC 15693 (Tag)

Microphone section

• Type: Electric condenser
• Directionality: Omni-directional
• Active frequency band: 100 Hz – 4 000 Hz

Other

• Head cushion: Silicone
• Ear pads: Polyurethane (leather-style finish)

* The specifications and design of this product are subject to change without notice.