How to Choose RJ45 Audio Cables for Broadcast Studios: XLR, TRS, RCA, 3.5mm & Bare Wire
A practical guide to connector type, balanced and unbalanced audio, single and dual channels, short adapters and full-length RJ45 audio cable assemblies.
Quick reference: Choosing an RJ45 audio cable is not simply a matter of matching connector shapes. The correct cable depends on the equipment pinout, signal format, number of audio channels, destination connector and installation layout. XLR, TRS, RCA and 3.5mm cables that look mechanically similar may be wired for very different audio applications.
RJ45 audio is not automatically Ethernet: In broadcast and professional audio systems, an 8P8C RJ45-style connector may be used for structured analog or digital audio wiring. Always confirm the equipment documentation and pin assignment before connecting or replacing a cable.
Contents
1. What Is an RJ45 Audio Cable?
RJ45 is most familiar as a network connector, but professional broadcast and studio systems can also use the same 8P8C connector format for audio wiring. Twisted-pair cable provides multiple conductor pairs in a compact cable, allowing structured cabling to be used between consoles, audio nodes, equipment racks and other studio hardware.
At the equipment end, the RJ45 audio connection may need to transition to XLR, 1/4-inch TRS, 3.5mm TRS, RCA or open wire. The correct choice depends on what the destination equipment expects electrically as well as mechanically.
2. Short RJ45 Female Adapter vs Full-Length RJ45 Male Cable
Before choosing XLR, TRS or RCA, first decide how the cable will fit into the studio wiring. The Premier Cable range includes two basic installation formats: compact RJ45 female adapters and longer RJ45 male cable assemblies.
RJ45 Female, Typically 20–30cm
A short female adapter is normally used at the equipment end together with a separate RJ45 patch cable. This allows the main cable length to be changed independently without replacing the audio connector adapter.
- Useful for structured studio cabling
- Easy to change patch-cable length
- Reduces excess cable behind equipment
- Suitable for racks, consoles and workstations
RJ45 Male, Typically 1.83m or 2m
A full-length cable connects directly from the RJ45 audio interface to the destination equipment. It removes the need for a separate RJ45 patch cable when the required route can be covered by the cable assembly itself.
- Direct equipment-to-equipment connection
- Fewer separate connection points
- Useful between consoles and nearby racks
- Available with multiple audio connector options
| Format | RJ45 Side | Typical Length | Best For |
|---|---|---|---|
| Short adapter | Female | 20–30cm | Structured studio wiring with separate patch cable |
| Full-length cable | Male | 1.83m / 2m | Direct equipment connection |
3. How to Choose an RJ45 to XLR Audio Cable
XLR is one of the most common interfaces for professional balanced audio. RJ45-to-XLR cables are therefore useful when structured broadcast wiring needs to connect with consoles, processors, audio interfaces, recorders and other equipment using conventional three-pin XLR connectors.
Single XLR or Dual XLR?
A single XLR adapter normally provides one balanced audio channel. In contrast, a dual-XLR assembly separates two audio channels from the compatible RJ45 interface and routes them to two independent XLR connectors.
This distinction matters because a dual-XLR cable is not necessarily a conventional signal splitter. The two connectors may represent separate audio channels rather than two copies of the same signal.
XLR gender selection: Choose XLR male or female according to the actual equipment interface. Connector gender does not by itself define signal direction; the source and destination equipment documentation should remain the reference.
Premier Cable XLR Configurations
| Model | Configuration | Format |
|---|---|---|
| PCM-KW-674 | RJ45 Female → XLR Male | Short single-channel adapter |
| PCM-KW-675 | RJ45 Female → XLR Female | Short single-channel adapter |
| PCM-KW-661 / 662 | RJ45 Female → Dual XLR | Short two-channel adapter |
| PCM-KW-663 / 664 | RJ45 Male → Dual XLR | 2m two-channel cable |
4. RJ45 to 1/4-Inch TRS for Mixers and Professional Audio Equipment
Dual TRS Does Not Necessarily Mean Two Stereo Outputs
The 6.35mm or 1/4-inch TRS connector is widely used on mixers, audio interfaces, processors and other professional audio equipment. A TRS connector can be used as a balanced mono connection, with the three contacts carrying the two signal conductors and shield.
In an RJ45-to-dual-TRS assembly, each TRS plug can carry one independent balanced audio channel. Two plugs can therefore form the two channels of a stereo pair without either individual TRS plug being a complete stereo output.
Typical equipment: mixing consoles, audio interfaces, signal processors, broadcast racks and professional line-level audio equipment.
Short RJ45 Female Adapter
RJ45 female to dual 6.35mm TRS male configuration for compact equipment-side installation.
2m RJ45 Male Cable
RJ45 male to dual 6.35mm TRS male configuration for direct equipment-to-equipment wiring.
5. RJ45 to 3.5mm: Single Stereo vs Dual Balanced Mini
3.5mm TRS cables deserve special attention because two products can use the same connector diameter while serving completely different signal formats. The main distinction is whether the cable terminates in one stereo mini connector or two individual balanced mini connectors.
Two-Channel Unbalanced Stereo
A single 3.5mm TRS connector can carry left and right audio channels together with a common return. This format is suitable for compatible stereo mini-jack equipment.
- PCM-KW-671 - short RJ45 female adapter
- PCM-KW-672 - 6ft RJ45 male cable
- Typical devices: recorder, computer, playback and compact AV equipment
Two Separate Balanced Channels
In the dual-mini configuration, each 3.5mm TRS connector can carry one balanced audio channel. The two connectors therefore represent separate channels rather than two duplicate stereo outputs.
- PCM-KW-669 - short RJ45 female adapter
- PCM-KW-670 - 6ft RJ45 male cable
- Useful with compatible balanced mini-jack professional equipment
Why This Difference Matters
A buyer selecting only by the words "RJ45 to 3.5mm" could easily choose the wrong assembly. Single stereo and dual balanced versions use different internal wiring and are intended for different equipment interfaces.
Confirm whether the destination needs one conventional stereo mini input or two separate balanced mini connections before ordering.
| Configuration | Signal Format | Connectors | Models |
|---|---|---|---|
| Single 3.5mm | Two-channel unbalanced stereo | 1 × TRS | PCM-KW-671 / 672 |
| Dual 3.5mm | Two separate balanced channels | 2 × TRS | PCM-KW-669 / 670 |
6. RJ45 to RCA Audio Cables
RCA connectors are widely used for unbalanced analog audio. An RJ45-to-RCA cable can provide the transition between compatible structured studio wiring and recorders, playback devices, monitoring equipment or AV hardware using RCA interfaces.
Because professional RJ45 audio wiring may be balanced while RCA is normally unbalanced, the internal wiring arrangement must be matched to the source and destination equipment. Connector compatibility alone is not enough.
Available formats: PCM-KW-665 provides a short RJ45 female to dual RCA male adapter, while PCM-KW-666 provides an RJ45 male to dual RCA male full-length cable.
7. When Should You Choose an RJ45 to Bare Wire Cable?
Not every installation ends in a standard XLR, TRS or RCA connector. Equipment may instead use terminal blocks, screw terminals, custom connectors or internal wiring points. In these applications, an RJ45-to-open-wire cable provides greater termination flexibility.
Terminal Blocks
Terminate the individual conductors directly into screw or spring terminals.
OEM Equipment
Connect the RJ45 audio interface to application-specific internal wiring or custom connectors.
Retrofit Projects
Useful when an existing installation uses non-standard field wiring that must be retained.
Custom Integration
Provides flexibility when the final equipment-side connector has not yet been standardized.
PCM-KW-659 uses a short RJ45 female to dual open-wire configuration, while PCM-KW-660 provides a longer RJ45 male cable for installations requiring additional routing distance.
8. How to Select the Right RJ45 Audio Cable
The easiest way to select an RJ45 audio cable is to start with the destination equipment and required signal type rather than starting with the cable itself.
| Equipment / Requirement | Recommended Cable Type | Key Check |
|---|---|---|
| Professional balanced XLR equipment | RJ45 to XLR | Single/dual channel and XLR gender |
| Mixer or processor with balanced 1/4" input/output | RJ45 to Dual 1/4" TRS | Balanced channel wiring |
| Computer, recorder or stereo mini input | RJ45 to Single 3.5mm TRS | Two-channel unbalanced stereo |
| Equipment with two balanced mini inputs | RJ45 to Dual 3.5mm TRS | Two separate balanced channels |
| RCA analog audio equipment | RJ45 to Dual RCA | Balanced-to-unbalanced wiring |
| Terminal block or custom equipment wiring | RJ45 to Bare Wire | Field termination and pinout |
| Existing structured RJ45 cable run | Short RJ45 Female Adapter | Separate patch-cable length |
| Direct connection between nearby equipment | Full-Length RJ45 Male Cable | Required routing length |
Information to Confirm Before Ordering
Identify the console, node, processor, interface or destination equipment.
Confirm the actual audio wiring used by the equipment.
Determine whether the required connection is balanced or unbalanced.
Select XLR, TRS, RCA, 3.5mm or bare-wire termination.
Confirm whether one or two independent audio channels are required.
Choose a short equipment adapter or full-length cable according to the physical installation.
9. StudioHub, Axia and Broadcast Audio Compatibility
StudioHub-style structured audio wiring is one reason RJ45 connectors are commonly seen in professional broadcast environments. Axia and other broadcast equipment may also use RJ45 audio interfaces as part of their studio wiring architecture.
However, compatibility should never be assumed solely because two devices use an RJ45 connector. Equipment from different manufacturers, or even different interfaces within the same system, may use different pin assignments or signal formats.
Compatibility rule: Confirm the equipment model, RJ45 pin assignment, balanced or unbalanced requirement and destination connector before ordering. RJ45 connector appearance alone does not establish electrical compatibility.
10. Custom RJ45 Audio Cable Assemblies
Standard connector combinations cover many broadcast applications, but replacement projects, OEM equipment and system integration work may require different cable lengths, connector genders or pin assignments.
Connector Options
- RJ45 male or female
- XLR male or female
- 3.5mm TRS
- 6.35mm / 1/4" TRS
- RCA
- Open wire
Cable Configuration
- Single or dual audio channel
- Short adapter or full cable
- Custom overall length
- Custom breakout length
- Shielded cable construction
- Alternative molding configuration
Project Requirements
- Custom audio pin assignment
- Channel identification
- Cable and connector labeling
- Equipment-specific replacement cables
- Drawings and samples
- OEM / ODM production
Recommended information for custom projects: provide the equipment model, connector combination, required pinout, signal type, cable length and quantity. An existing cable photo, drawing, wiring diagram or physical sample can also help confirm the required configuration.
Frequently Asked Questions
Is an RJ45 audio cable the same as an Ethernet cable?
No. The same 8P8C connector format can be used for different purposes. An RJ45 audio cable may use an application-specific audio pin assignment and should only be connected after the equipment interface has been confirmed.
What is the difference between single and dual XLR RJ45 cables?
A single-XLR assembly normally provides one balanced audio channel. A dual-XLR assembly can provide two separate channels from the compatible RJ45 interface. The two XLR connectors should not automatically be interpreted as duplicated outputs.
What is the difference between single and dual 3.5mm RJ45 audio cables?
A single 3.5mm TRS cable can carry two-channel unbalanced stereo audio on one connector. A dual-3.5mm configuration can instead provide two separate balanced audio channels, with one channel on each TRS connector.
Should I choose a short RJ45 female adapter or a full-length RJ45 male cable?
Choose a short female adapter when the main cable run is already handled by a separate RJ45 patch cable. Choose a full-length male cable when a direct connection between the RJ45 audio interface and destination equipment is preferred.
Can RJ45 audio cables be customized for different pinouts?
Yes. Cable length, connector type, connector gender, channel configuration, pin assignment, labeling and other construction details can be customized. The required wiring should be approved against the connected equipment before production.
Need Help Selecting an RJ45 Audio Cable?
Send the equipment model, RJ45 pinout, destination connector, required cable length and quantity. Premier Cable can review the connection requirement and recommend an XLR, TRS, RCA, 3.5mm, open-wire or custom RJ45 audio cable configuration.
Custom connector combinations, cable length, channel configuration, pin assignment, molding and labeling can be discussed for broadcast, studio, professional AV and OEM integration projects.
