XLR Audio over Fiber
The Thor Fiber XLR Audio Over Fiber System is a professional solution for transmitting balanced XLR audio over fiber optic cable across long distances. This audio over fiber system is designed for broadcast, live events, and professional AV applications, delivering low-noise, interference-free analog audio over fiber beyond the limits of traditional copper cabling.
Each kit includes a matched XLR audio over fiber transmitter (TX) and receiver (RX), supporting 2, 4, 8, 16, or 32 channels of balanced audio over fiber on a single optical link. Using 16-bit digitally encoded audio, the system ensures broadcast-quality audio over fiber transmission with perfect channel integrity and no EMI or RF interference.
The Thor fiber optic audio extender supports both single-mode and multi-mode fiber, enabling long-distance audio over fiber transmission up to 20 km on single-mode fiber and 3 km on multi-mode fiber. Extended configurations are available for 40 km, 80 km, and up to 120 km fiber audio transmission, making it ideal for large-scale and campus-wide deployments.
This XLR fiber audio system is widely used for broadcast audio over fiber, intercom over fiber, microphone audio over fiber, and pro audio fiber transmission in studios, concerts, theaters, stadiums, churches, theme parks, and CCTV audio systems. It integrates easily with audio mixers, digital recorders, intercom systems, and XLR signal splitters, making it a flexible fiber optic audio converter solution.
Available in both standalone and rack-mounted configurations, the system is built for reliability in demanding environments. Our standard optical interfaces use ST/PC fiber connectors.
- 3-Pin Balanced XLR Audio input/output
- Uni-directional 2 or 4 or 8 or 16 or 32 Channel
- Bi-directional over single fiber available on 2 and 4 Channel model
- 12V DC Power input
- Single mode fiber up to 20km, Multimode fiber up to 3000feet
- 40, 80, 120Km models avaiable
- Easy to Use, Plug and Play Units
Uni-Directional Models:
F-2A-XLR-TX/RX - 2 XLR Balanced Audio over Fiber Transmitter / Receiver kit up to 20KM singlemode / 3000feet multimode -Stand alone ( portable)
F-4A-XLR-TX/RX - 4 XLR Balanced Audio over fiber Transmitter / Receiver kit up to 20KM singlemode / 3000feet multimode - Stand alone ( portable)
F-8A-XLR-TX/RX-RM - 8 XLR Balanced Audio over fiber Transmitter / Receiver kit up to 20KM singlemode / 3000feet multimode 19"Rack Mountable
F-16A-XLR-TX/RX-RM - 16 XLR Balanced Audio over fiber Transmitter / Receiver kit up to 20KM singlemode / 3000feet multimode (special order) 19"Rack Mountable
F-32A-XLR-TX/RX-RM - 32 XLR Balanced Audio over fiber Transmitter / Receiver kit up to 20KM singlemode / 3000feet multimode (special order) 19"Rack Mountable
Bi-Directional Models:
F-2A-XLR-B-TX/RX - Stand alone ( portable) 2 Bi-directonal XLR Balanced Audio over 1 fiber Transmitter / Receiver (transceivers) kit up to 20KM singlemode / 3000feet multimode
F-2A-XLR-B-TX/RX-RM 2 Bi-directonal XLR Balanced Audio over 1 fiber Transmitter / Receiver (transceivers) kit up to 20KM singlemode / 3000feet multimode - 19"Rack Mountable form factor
F-4A-XLR-B-TX/RX-RM - 4 Bidirectional XLR Balanced Audio over 1 fiber Transmitter / Receiver (transceivers) kit up to 20KM singlemode / 3000feet multimode 19"Rack Mountable form factor
F-8A-XLR-B-TX/RX-RM - 8 Bidirectional XLR Balanced Audio over 1 fiber Transmitter / Receiver (transceivers) kit up to 20KM singlemode / 3000feet multimode 19"Rack Mountable form factor
PN: F-4A-XLR-TX/RX-XX ( XX= 40,60,80,120) 40km, 60Km, 80km 120km models available for all XLR Audio products (special order)

| Optical | |
| Wavelength | 1310nm or 1310/1550 for bi-directional models |
| Output Power | -8dBm (+-2db) |
| Optic fiber | 50/125u multimode, 62.5/125u multimode, 9/125u single mode |
| Rx sensitivity | -25dBm |
| Optical connector | ST/PC |
| Distance | 20Km for singlemode and 0~2KM (MM), 40, 80 120Km - model specific |
| Balanced Audio | |
| Number of Channels | 2-32 Input on the TX 2-32 Output on the RX |
| Input Connector | XLR (female) |
| Output Connector | XLR (male) |
| Input / Output Impedance | 600 Ohm |
| Input capacitance LINE inputs | 10 pF |
| Max input/output voltage | 4.0Vp-p (6db) |
| Frequency Response | 10 Hz - 20kHz @±3dB |
| Sample Rates From | 48kHz |
|
SNR Dynamic bandwitch Total harminc distortion (THD) |
> 80dB 101dB -90dB |
| Electrical & Mechanical | |
|
Input Power Requirements: |
DC 5V@2A |
|
Power Adapter: |
AC 90V~240V |
|
Power Consumption: |
< 5W |
|
Stand-Alone Dimensions: 19"Rack Mountable |
168mm × 154mm × 45mm ( L: 6 3/4" D 4 1/2" H: 1 3/4" for the mounting holes) 19" x 9" x 1.75" (RM) |
|
Shipping Weight: |
- Stand alone models(Transmitter & Receiver ) 5lb - 19" rack mountable form factor -12lb
|
| Environmental | |
| Operating Temperature: | -20°C ~ +75°C |
| Storage Temperature: | -40°C ~ +85°C |
| Relative Humidity: | 0% ~ 95% (non-condensing) |
| MTBF: | >100,000 hours |
