Product Description
Professional 75-Ohm BNC Word Clock Cable for Studio, Broadcast and Production
The AV-Cables Belden 4505R Word Clock Cable is engineered for dependable digital-audio clock distribution between compatible professional audio devices. Its durable full-size RG59 construction, professional shielding and controlled 75-ohm impedance make it an excellent choice for recording studios, broadcast facilities, post-production systems, production racks and professional AV installations.
Each assembly is manufactured using genuine Belden 4505R coaxial cable and precision 75-ohm BNC male connectors. Every completed cable is hand assembled and individually tested in the USA before shipment.
Standard black cable construction: All Word Clock cables ordered through this product page are supplied in black. Other jacket colors may be available as special-request builds, depending on material availability, quantity and production lead time.
Belden 4505R Word Clock Cable Key Features
- Genuine Belden 4505R professional coaxial cable
- Professional full-size RG59 construction
- Nominal 75-ohm characteristic impedance
- Precision 75-ohm BNC male connectors
- BNC male-to-BNC male configuration
- Designed for compatible professional Word Clock systems
- 20 AWG solid silver-plated copper center conductor
- Foil shield with 95% tinned-copper braid coverage
- Durable construction for studios, racks and production systems
- Secure bayonet-style BNC connections
- Black cable jacket supplied as standard
- Standard and custom lengths available
- Other jacket colors available by special request
- Hand assembled and individually tested in the USA
- Lifetime Connector Replacement Warranty
Designed for Professional Word Clock Connections
Word Clock is a timing-reference signal used to synchronize compatible digital-audio equipment. It allows multiple devices to operate from the same clock source so digital consoles, converters, audio interfaces, recorders and distribution equipment remain synchronized.
Belden 4505R is a durable full-size RG59 coaxial cable with a nominal impedance of 75 ohms. Its professional construction makes it well suited for equipment-to-equipment connections and applications where the cable may be installed in racks, routed through studios or handled in production environments.
The precision coaxial construction and properly matched BNC connectors help provide a consistent 75-ohm signal path between compatible Word Clock inputs and outputs.
Recommended Applications
- Recording and mastering studios
- Broadcast audio facilities
- Post-production suites
- Master Word Clock generators
- Word Clock distribution amplifiers
- Digital mixing consoles
- Professional audio interfaces
- A/D and D/A converters
- Digital audio recorders
- Digital signal processors
- Broadcast trucks and production racks
- Live production audio systems
- Commercial AV installations
- Professional equipment interconnections
Need another cable color? Black is the only standard color offered through this product page. Other jacket colors may be available by special request. Contact AV-Cables for availability, minimum quantities and current lead times.
Why Use a True 75-Ohm Word Clock Cable?
Professional Word Clock connections commonly use 75-ohm BNC interfaces. Although a Word Clock cable may look similar to a general-purpose RF cable, its cable and connector impedance must be appropriate for the connected digital-audio equipment.
Belden 4505R is designed to maintain a nominal 75-ohm characteristic impedance. Using properly matched 75-ohm coax and BNC connectors helps reduce signal reflections and provides a consistent signal path between compatible synchronized devices.
| Feature | Belden 4505R Word Clock Cable | General 50-Ohm RF Cable |
|---|---|---|
| Primary signal | Digital-audio timing reference | RF, communications and test signals |
| Characteristic impedance | Nominal 75 ohms | Nominal 50 ohms |
| Cable construction | Professional full-size RG59 coax | Varies by cable type |
| Connector | Precision 75-ohm BNC | Commonly 50-ohm BNC |
| Recommended use | Compatible professional Word Clock equipment | Compatible RF and communications equipment |
Available Black Word Clock Cable Lengths
Choose from standard black cable lengths ranging from short rack connections through longer studio and production runs. Custom lengths are available when a standard option does not fit your installation.
| Length Range | Recommended Applications |
|---|---|
| 1.5–6ft | Equipment racks, converters, audio interfaces and closely positioned studio equipment |
| 10–25ft | Control rooms, digital consoles, studio equipment and nearby equipment racks |
| 35–75ft | Broadcast facilities, larger studios, live production systems and rack-to-rack connections |
| 100ft | Extended professional audio-system connections where the complete cable length is supported by the equipment manufacturer |
Standard black cable lengths include 1.5ft, 3ft, 6ft, 10ft, 15ft, 25ft, 35ft, 50ft, 75ft and 100ft. Choose the shortest cable that safely reaches between devices while allowing enough additional length for routing and strain relief.
Belden 4505R Word Clock Cable Specifications
| Cable manufacturer | Belden |
| Cable model | 4505R |
| Cable type | Professional full-size RG59 coaxial cable |
| Primary application | Word Clock and compatible digital-audio synchronization systems |
| Characteristic impedance | Nominal 75 ohms |
| Center conductor | 20 AWG solid silver-plated copper |
| Shield | Foil shield with 95% tinned-copper braid |
| Outside diameter | Approximately 5.9 mm / 0.232 inches |
| Standard jacket color | Black |
| Connector configuration | Precision 75-ohm BNC male to BNC male |
| Standard lengths | 1.5, 3, 6, 10, 15, 25, 35, 50, 75 and 100 feet |
| Special-request colors | Contact AV-Cables for availability, minimum quantities and lead time |
| Assembly | Hand assembled and individually tested in the USA |
| Warranty | Lifetime Connector Replacement Warranty |
Word Clock Compatibility and Termination
Confirm that your equipment uses 75-ohm BNC Word Clock connections. Proper termination is essential for dependable clock distribution.
Some equipment provides internal, selectable or automatic termination. Other systems may require external termination. Follow the equipment manufacturer’s instructions for termination, daisy-chaining, distribution and maximum supported cable length.
Important compatibility note: Word Clock is a timing-reference signal and does not carry an audio or video program signal. Confirm the connection type, impedance and termination requirements listed by the equipment manufacturer before ordering.
Why Choose AV-Cables?
AV-Cables manufactures professional audio, video and broadcast cable assemblies using components from trusted professional brands. This Word Clock cable combines genuine Belden 4505R coax with precision 75-ohm BNC connectors for dependable performance in compatible professional digital-audio systems.
- Genuine Belden 4505R cable
- Precision 75-ohm BNC male connectors
- Standard black cable for simple online ordering
- Hand assembled in the USA
- Every completed cable is individually tested
- Standard and custom lengths available
- Special-request jacket colors available
- Volume production for studios, broadcasters, integrators and OEM customers
- Lifetime Connector Replacement Warranty
Need a special color, custom length or multiple matching cables? Contact AV-Cables for a custom quote.
View additional products in our 75-Ohm BNC Word Clock Cable category.
Belden 4505R Word Clock Cable FAQs
Is this a true 75-ohm Word Clock cable?
Yes. This assembly uses genuine Belden 4505R coax and precision BNC connectors designed to provide a complete 75-ohm signal path.
What cable color will I receive?
All standard Word Clock cables ordered through this product page are supplied with a black cable jacket.
Can I select another cable color online?
No. Black is the only standard online color. Customers only need to select the required cable length.
Can I special-order another color?
Yes. Other jacket colors may be available by special request. Availability, minimum quantities and production lead times may vary. Contact AV-Cables before ordering to discuss the required color.
What equipment can this cable connect?
This cable can connect compatible master clocks, digital consoles, professional audio interfaces, converters, recorders and Word Clock distribution equipment equipped with 75-ohm BNC clock connections.
Does Word Clock require termination?
Proper termination is important. Some equipment provides selectable or automatic termination, while other systems require external termination. Follow the instructions supplied by the equipment manufacturer.
Is this the same as a 50-ohm RF cable?
No. This assembly uses 75-ohm coax and 75-ohm BNC connectors for compatible Word Clock systems. General-purpose RF cables commonly use a 50-ohm construction.
Are custom lengths available?
Yes. AV-Cables can manufacture custom lengths, matching cable sets and production quantities for recording studios, equipment racks, broadcast facilities, live production systems and commercial AV installations.
