SX-839 V2 HiFi wireless headphones: HD audio, over-ear, up to 60 channels
Headphones for high-definition listening and all-day comfort: over-ear cups, RGB LEDs and up to 14 hours of battery life.
Available in 3-, 10- and 60-channel versions, from silent disco to conferences with simultaneous interpretation.
60Channels3-, 10- and 60-channel versions
14 hBattery lifemax, lithium battery
HDHiFi audiodetailed music and speech
Over-earComfortsoft, enveloping ear cups
High definition and comfort for long events
The SX-839 V2 HiFi delivers rich, balanced sound that brings out every detail in both music and speech. That makes it a natural choice for conferences, guided tours, concerts and museum installations.
- Over-ear: great fit and isolation, even in noisy environments.
- Lightweight: light frame and soft materials for long listening sessions.
- Versatile: radio frequency reception and a mini-jack input for wired connection.
- Compatible with all Silentsystem transmitters.
Three controls, zero hassle
01
Power on
Power button on the back of the right ear cup: the headphones turn on right away.
02
Pick a channel
Selector on the back of the left ear cup: the LED turns blue, red or green depending on the channel.
03
Adjust the volume
Volume wheel. Alternatively, connect the headphones with a cable through the mini-jack input.
See the SX-839 in action
The video tutorial covers power on, channel selection, volume control and wired connection. The full transcript is below.
SX-839 V2 HiFi spec sheet
| Parameter | Value |
|---|---|
| Model | Silentsystem SX-839 V2 HiFi |
| Type | Professional RF wireless headphones for events |
| Technology | UHF / RF system, FM modulation |
| Versions | 3, 10 or 60 channels |
| Frequency bands | 3-channel system: 863–865 MHz · 10-channel system: UHF 640–672 MHz · 60-channel system: UHF 500–600 and 640–672 MHz (details) |
| Speakers | SPB |
| S/N ratio | > 75 dB |
| Distortion (THD) | < 1% |
| Frequency response | 30 – 20,000 Hz |
| Channel separation | > 30 dB |
| Lights | RGB LEDs, can be switched off |
| Controls | Power button, channel selector, volume wheel |
| Wired input | Mini-jack |
| Design | Over-ear, foldable |
| Power | Built-in lithium battery |
| Battery life | Up to 14 hours |
The stated battery life is a maximum: it depends on listening volume, how often channels are changed and how the headphones are used. Figures may vary based on system configuration, transmitter and usage conditions.
Recommended uses
Compatible transmitters
Built for music and speech, for hours
- HD audio: rich, detailed listening for both music and speech.
- Over-ear: more comfort and isolation during long events.
- Up to 60 channels: silent disco, multilingual conferences and multiple audio tours.
- Works with every Silentsystem transmitter, fixed or portable.
- Up to 14 hours of battery life: for festivals and multi-day events.
SX-839 FAQ
Other Silentsystem headphones
SX-809
Super Power Bass, RGB LEDs and up to 45 channels, for silent disco and music events.
SX-858
10 channels and Double Funktion® for meetings and concerts.
SX-610
10 channels and 3.5 mm jack line in/out for meetings and SilentLab.
All headphones
Compare channels, battery life and recommended use across every model.
