Wireless headphones · SX-858 Double Funktion®

SX-858 Double Funktion® wireless headphones: 10 channels, 190 grams, over-ear

Ten channels, each with its own LED color, over-ear cups and a weight of just 190 grams: lightweight headphones for multichannel events, from silent disco to conferences.

With Double Funktion®, you can daisy-chain a second headphone from the 3.5 mm output.

10Channelseach with its own LED color

190 gWeightlight even after hours

10 hBattery lifemax, 500 mAh battery

40 mmMylar drivers30–20,000 Hz response

The sound

True-to-source sound, featherweight feel

The 40 mm Mylar speakers and 30 to 20,000 Hz frequency response deliver rich, balanced sound, clear for both music and speech.

  • 10 color-coded channels: blue, red, green, purple, yellow, turquoise, orange, pink, emerald and aquamarine.
  • Double Funktion®: 3.5 mm output to daisy-chain a second headphone.
  • 190 grams: lightweight frame and soft over-ear cups for long sessions.
  • Compact: from 180 × 140 × 80 mm open to 150 × 110 × 80 mm folded.
Silentsystem SX-858 wireless headphone
How to use

Three controls, zero hassle

01

Power on

On/Off switch on the outside of the left ear cup: the LEDs light up in the channel color.

02

Pick a channel

Selector on the right ear cup: 10 channels, each with its own LED color.

03

Adjust the volume

Volume wheel on the right ear cup. Use the 3.5 mm output to connect a second headphone.

Video

See the SX-858 in action

The video tutorial covers power on, the 10 color-coded channels, volume and the Double Funktion® feature. The full transcript is below.

Introduction. The Silentsystem SX-858 Double Funktion® headphones combine elegance, comfort and high sound quality, with 10 selectable channels and multicolor RGB LED lights for easy use even in crowded settings.

Power on and off. To turn them on, slide the On/Off switch toward ON on the outside of the left ear cup: the LEDs light up in the color of the selected channel. To turn them off, slide the switch back toward the charging port.

Channel selection. The outside of the right ear cup has the 10-channel selector, each channel with a different LED color: blue, red, green, purple, yellow, turquoise, orange, pink, emerald and aquamarine.

Volume control. Volume is adjusted with the volume wheel, also on the right ear cup.

Double Funktion®. The 3.5 mm output lets you daisy-chain a second headphone, for maximum flexibility even in specialized settings.

Applications. Silent disco, parties and events, concerts and festivals, conferences and conventions, interpretation and guided tours, education and training.

Conclusion. RF technology, 10 channels, Double Funktion® and a 500 mAh battery with up to 10 hours of battery life make the SX-858 a reliable, professional solution for any kind of event.

Specs

SX-858 Double Funktion® spec sheet

Parameter Value
Model Silentsystem SX-858 Double Funktion®
Type Professional RF wireless headphones for events
Technology RF (radio frequency)
Channels 10 selectable, each with a dedicated LED color
Frequency bands 10-channel system: UHF 640–672 MHz (details)
Speakers 40 mm Mylar
Frequency response 30 – 20,000 Hz
Lights Multicolor RGB LEDs
Controls On/Off switch, channel selector, volume wheel
Output 3.5 mm Double Funktion® jack
Power DC 3.7 V, built-in 500 mAh Li-ion polymer battery
Battery life 8 – 10 hours
Charging time About 4 hours
Weight 190 grams
Dimensions (open) 180 × 140 × 80 mm
Dimensions (folded) 150 × 110 × 80 mm

They work exclusively with Silentsystem® transmitters. Figures may vary based on system configuration and usage conditions.

Recommended uses

Compatible transmitters

Why choose them

Light, colorful, flexible

  • Double Funktion®: connect a second headphone via 3.5 mm to share the audio.
  • 10 selectable channels: silent disco, multichannel conferences and multiple audio tours.
  • 190 grams, over-ear: comfort and isolation during long events.
  • Works with Silentsystem transmitters, in fixed or mobile setups.
  • 8–10 hours of battery life, with a full charge in about 4 hours.
Silentsystem SX-858 silent headphones at an event
FAQ

SX-858 FAQ

Ten selectable channels, each with a dedicated LED color: blue, red, green, purple, yellow, turquoise, orange, pink, emerald and aquamarine.

It’s the 3.5 mm jack output on the ear cup: it lets you daisy-chain a second headphone and share the audio.

They weigh 190 grams and run 8–10 hours on the 500 mAh battery, which recharges in about 4 hours.

No, they work exclusively with Silentsystem® transmitters: TX-500, TX-350, TX-330, TX-300 and TX-100.

No. The SX-858 receives audio via radio frequency: no internet, app or Bluetooth needed.
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