AlphaTheta HDJ-F9 SonicLink Wireless DJ Headphones – Black
The AlphaTheta HDJ-F9 combines on-ear monitoring with SonicLink wireless technology for responsive DJ performances. Bluetooth and a supplied cable provide additional listening options, while flexible construction supports different monitoring styles. A practical choice for DJs seeking freedom of movement alongside clear sound, everyday connectivity and a compact design for travel.
AlphaTheta HDJ-F9 SonicLink Wireless DJ Headphones
The AlphaTheta HDJ-F9 brings wireless freedom to professional DJ monitoring in a compact on-ear design. SonicLink delivers latency as low as 9ms, supporting accurate cueing, beatmatching and scratch performance without a headphone cable restricting your movement.
Connect to compatible SonicLink equipment, or use the separately sold HP-TX01 transmitter with suitable equipment that needs an external transmitter. SonicLink Touch Pairing provides a quick connection method with supported devices.
Newly developed 40mm drivers and bass-reflex chambers provide defined low-frequency reproduction, while the headphones' acoustic design helps isolate your monitoring from surrounding sound.
Swivel-mounted hangers and a flexible silicone headband accommodate different listening positions. The adjustable die-cast aluminium slider adds durability for regular use.
Between performances, switch to Bluetooth for music and hands-free calls. A supplied coiled cable also provides a wired monitoring option.
The HP-TX01 SonicLink transmitter is sold separately. Check your equipment's compatibility before choosing your wireless setup.
Are the AlphaTheta HDJ-F9 Right for You?
- Club DJs: Build a monitoring setup around your booth equipment and preferred listening style.
- Mobile DJs: Plan wireless monitoring across different event setups.
- Performance DJs: Consider freedom of movement when organising your booth.
- On-ear headphone users: Choose a fit suited to your monitoring preferences.
- Everyday listeners: Use an additional listening option between performances.
Check your DJ equipment's SonicLink compatibility and whether you need a separate transmitter before ordering.
Choose Your AlphaTheta HDJ-F9 Monitoring Setup
| Connection | Recommended use | What you need |
|---|---|---|
| SonicLink | Low-latency wireless DJ monitoring. | Compatible SonicLink equipment or a suitable setup using the separately sold AlphaTheta HP-TX01 SonicLink Transmitter. |
| Bluetooth | Everyday music playback and hands-free calls. | A compatible Bluetooth device. |
| Wired | Cable-based monitoring from suitable audio equipment. | The supplied cable and adapter where required. |
Check your equipment before buying a transmitter. Compatible DJ equipment may provide SonicLink directly. The HP-TX01 is sold separately for setups that require an external transmitter.
Compare Another AlphaTheta Wireless Headphone Option
Also considering the AlphaTheta HDJ-F10 Professional Wireless DJ Headphones? Compare their fit, features and connection requirements with the HDJ-F9 to choose the right headphones for your monitoring style.
Explore our full range of DJ headphones for more monitoring options.
Complete Your AlphaTheta HDJ-F9 Setup
Prepare your monitoring setup around the equipment you use at home, in the booth and between events.
- SonicLink source: Check whether your DJ equipment provides compatible headphone transmission.
- SonicLink transmitter: Add the AlphaTheta HP-TX01 Transmitter for Professional Wireless DJ Headphones if your equipment requires an external SonicLink transmitter. Sold separately.
- Firmware: Follow the manufacturer's update guidance for your headphones and compatible DJ equipment.
- Charging arrangements: Prepare a suitable USB charging source for your performances.
- Transport protection: Use the included carrying pouch and consider additional protection for demanding travel.
- Wired monitoring: Keep the supplied coiled cable and 6.3mm adapter with your equipment.
Compare other monitoring options in our DJ headphones range.
AlphaTheta HDJ-F9 Frequently Asked Questions
Are the HDJ-F9 on-ear or over-ear headphones?
They use an on-ear design.
Can I DJ wirelessly with them?
Yes. SonicLink provides low-latency wireless monitoring with compatible equipment.
Is the SonicLink transmitter included?
No. The HP-TX01 transmitter is sold separately.
Do I always need the HP-TX01?
No. Compatible DJ equipment may provide SonicLink directly. Check your particular device before ordering accessories.
Can I use Bluetooth for beatmatching?
Use SonicLink for timing-sensitive wireless DJ monitoring. Bluetooth is intended for everyday listening and calls.
Can I use a cable instead?
Yes. A coiled monitoring cable and 6.3mm adapter are included.
How long does the battery last with SonicLink?
Approximately seven hours with the Status LED on, or nine hours with it off. Actual runtime varies with use.
How long does charging take?
A full charge takes approximately 2.5 hours. A 30-minute charge provides around 2.5 hours of SonicLink use.
Can I connect two Bluetooth devices?
Yes. Multipoint Bluetooth supports connection to two devices for switching between them.
Do they include a microphone and carrying pouch?
Yes. A microphone is built in, and a carrying pouch is supplied.
AlphaTheta HDJ-F9 Key Features
- SonicLink wireless monitoring: Latency as low as 9ms.
- Touch Pairing: Quick connection with compatible SonicLink equipment.
- 40mm drivers: Designed for clear, defined monitoring.
- Bass-reflex chambers: Support accurate bass and kick reproduction.
- On-ear construction: Swivel-mounted hangers and a flexible silicone headband.
- Durable adjustment: Die-cast aluminium slider.
- Multipoint Bluetooth: Connect two Bluetooth devices for convenient switching.
- Built-in microphone: Hands-free calling.
- Wired option: Supplied coiled monitoring cable.
Included Accessories
- 1.2m coiled cable, extending to approximately 3m
- 6.3mm screw-type stereo adapter
- 0.5m USB-C to USB-C charging cable
- Carrying pouch
- Quick Start Guide
- Precautions for Use
The HP-TX01 transmitter is not included.
AlphaTheta HDJ-F9 Technical Specifications
| Headphone design | Closed, dynamic, on-ear |
|---|---|
| Drivers | 40mm dome-type |
| Frequency response | 5Hz–30kHz |
| Impedance | 32 ohms |
| Output sound pressure level | 106dB |
| SonicLink latency | As low as 9ms |
| SonicLink range | Approximately 15m in unobstructed conditions |
| SonicLink playback time | Approximately 7 hours with Status LED on; 9 hours with LED off |
| Bluetooth version | 5.3 |
| Bluetooth codecs | SBC and AAC |
| Bluetooth profiles | A2DP, AVRCP, HSP and HFP |
| Bluetooth range | Approximately 10m in unobstructed conditions |
| Bluetooth playback time | Approximately 13 hours with Status LED on; 25 hours with LED off |
| Full charging time | Approximately 2.5 hours |
| Quick charging | A 30-minute charge provides approximately 2.5 hours of SonicLink use |
| Weight without cable | 285g |
| Colour | Black |
Battery life varies with volume, audio content and operating conditions. Wireless range depends on the connected equipment and surrounding environment.