Neutrik NP3X 6.35mm TRS Jack Plug – Nickel Shell, Nickel Contacts
Build professional balanced, stereo and three-contact audio cables with the Neutrik NP3X 6.35mm (¼-inch) 3-Pole TRS Jack Plug, featuring a rugged nickel-plated metal shell, nickel-plated brass contacts and Neutrik’s proven chuck-type strain relief.
Part of Neutrik’s professional Plug X / PX Series, the NP3X is a heavy-duty 3-pole phone plug designed for professional audio applications where mechanical reliability, compact dimensions and dependable cable retention matter.
The NP3X combines:
- 6.35mm / ¼-inch professional phone plug
- 3-pole TRS configuration
- Nickel-plated zinc die-cast shell
- 2µm nickel-plated brass contacts
- Precision-machined one-piece contact construction
- Extra-slim 14.5mm housing
- Suitable for 15.88mm high-density jackfield spacing
- Neutrik chuck-type cable strain relief
- 4–7mm cable compatibility
- Maximum conductor size of 1.0mm² / 18 AWG
- Solder termination
- More than 1,000 mating cycles
- IEC 60603-11 / EIA RS-453 compliance
The NP3X is particularly suited to:
- Balanced audio cables
- Stereo audio cables
- TRS patch leads
- Studio patching
- Insert cables
- Mixing consoles
- Audio interfaces
- Headphone cables and extensions
- Amplifiers
- Signal processors
- Professional audio racks
- Recording studios
- Broadcast
- Theatre
- Touring production
- Film and television
- Professional AV
- Equipment-hire inventory
- Custom cable manufacture and repair
Professional 6.35mm TRS Jack Plug
The NP3X is a professional:
6.35mm / ¼-inch 3-pole phone plug.
The three electrical contacts are:
Tip
Ring
Sleeve
giving the common abbreviation:
TRS.
Unlike a 2-pole TS plug, the additional ring contact allows the NP3X to carry three separate electrical connections.
Depending on the equipment and wiring, those contacts can be used for:
- Balanced mono audio
- Stereo audio
- Headphones
- Insert send/return
- Other equipment-specific three-contact functions
TRS therefore describes the physical connector arrangement rather than automatically meaning “stereo”.
3-Pole TRS – Balanced or Stereo
This distinction is important for professional audio.
A 3-pole TRS connector can commonly be wired in several ways.
Balanced Mono Audio
A typical balanced analogue audio connection may use:
Tip – Positive / Hot
Ring – Negative / Cold
Sleeve – Shield / Ground
This is commonly used on:
- Mixing consoles
- Audio interfaces
- Signal processors
- Professional amplifiers
- Installed audio equipment
- Studio equipment
Stereo Audio
A stereo connection may commonly use:
Tip – Left
Ring – Right
Sleeve – Common return
This arrangement is often found on:
- Headphones
- Stereo outputs
- Monitoring equipment
- Consumer/professional audio interfaces
Insert Wiring
Mixing-console insert connections may use TRS to carry:
Tip – Send
Ring – Return
Sleeve – Common ground
However, equipment conventions can vary.
Always confirm the equipment manufacturer’s pinout before manufacturing a cable.
6.35mm – The Correct Size
The correct nominal connector size is:
6.35mm
or:
¼ inch.
Customers may informally search for:
- 6.5mm jack
- large jack plug
- quarter-inch jack
- stereo jack
but 6.35mm is the correct nominal size and should be used throughout the technical product description.
Plug X / PX Series
The NP3X belongs to Neutrik’s established:
Plug X / PX Series.
Neutrik developed the PX Series as an improvement over its earlier C Series professional phone plugs.
The design combines:
- Extra-slim metal construction
- Professional cable strain relief
- Precision-machined contact geometry
- Straightforward cable assembly
- High-density equipment compatibility
This makes it particularly suitable for demanding professional audio environments.
Extra-Slim 14.5mm Housing
One of the defining features of the NP3X is its:
14.5mm shell width.
Neutrik specifically designed this slim housing for modern high-density jackfields using approximately:
15.88mm jack pitch.
That can be important when connectors are installed next to one another in tightly packed:
- Patch systems
- Audio equipment
- Mixing consoles
- Interfaces
- Rack equipment
A bulky plug body can physically interfere with neighbouring connections.
The slim NP3X helps maximise connection density.
High-Density Jackfields
Professional studios and broadcast facilities may contain large patch systems with many closely spaced ¼-inch sockets.
The NP3X’s 14.5mm housing helps maintain access to adjacent sockets while still providing a robust metal connector body.
Potential applications include:
- Studio patch systems
- Professional jackfields
- Mixing desks
- Recording racks
- Broadcast audio
- Equipment patch panels
Precision-Machined One-Piece Contact Design
Neutrik uses:
Precision-machined one-piece contacts
within the Plug X Series.
A particularly important feature is the one-piece tip contact without a separate riveted tip.
Neutrik specifically designed this arrangement to help avoid the tip:
- Hooking inside a jack socket
- Separating from the plug
during repeated use.
No Separate Riveted Tip
Some traditional phone plugs use a separate tip component joined mechanically to the main contact structure.
Neutrik’s one-piece design removes that separate riveted tip joint.
For professional cables that are plugged and unplugged frequently, reducing unnecessary mechanical joints within the connector is a practical advantage.
Nickel-Plated Zinc Die-Cast Shell
Neutrik specifies the NP3X shell as:
Zinc die-cast ZnAl4Cu1
with:
Nickel plating.
This provides the familiar silver-coloured metal appearance of the standard NP3X.
The technically correct terminology is:
Nickel shell
or:
Nickel-plated zinc die-cast housing.
Nickel-Plated Brass Contacts
Neutrik specifies:
Contact Material: Brass CuZn39Pb3
Contact Plating: 2µm nickel
This distinguishes the standard NP3X from other PX Series variants using black shells or gold-plated contacts.
NP3X vs NP3X-BAG
Neutrik offers:
NP3X-BAG
for customers requiring a black housing while retaining nickel contacts.
NP3X
- Nickel shell
- Nickel contacts
NP3X-BAG
- Black KTL-coated shell
- Nickel contacts
Both use the same basic 3-pole straight Plug X architecture.
NP3X vs NP3X-B
Neutrik also offers:
NP3X-B
with:
- Black KTL-coated shell
- Gold-plated contacts
The suffix therefore matters when ordering.
NP3X
Nickel shell / nickel contacts
NP3X-BAG
Black shell / nickel contacts
NP3X-B
Black shell / gold contacts
NP3X vs NP2X
The NP3X should also be distinguished from Neutrik’s 2-pole NP2X.
NP3X
3-pole TRS
Suitable for applications including:
- Balanced mono
- Stereo
- Headphones
- Inserts
- Three-contact interconnects
NP2X
2-pole TS
Typically used for:
- Unbalanced mono
- Guitar
- Bass
- Instrument signals
- Equipment-specific two-contact connections
The correct connector depends on the electrical requirements of the equipment.
Professional Balanced Audio Cables
Balanced audio is one of the strongest professional applications for NP3X.
A balanced line uses two signal conductors plus a shield/ground path.
Balanced connections can help reject noise picked up along the cable when used with appropriately designed equipment and cable.
Potential applications include:
- Mixing-console outputs
- Audio-interface inputs and outputs
- DSP systems
- Signal processors
- Amplifiers
- Installed AV
- Studio equipment
Balanced TRS to XLR Cables
The NP3X can also be used to manufacture professional:
TRS-to-XLR cables
where the equipment requires the appropriate balanced analogue wiring.
For example, a correctly wired cable may connect:
- TRS output to XLR input
- XLR output to TRS input
- Audio interface to mixer
- Mixer to processor
- Processor to amplifier
Always confirm the equipment pinout and signal format before assembling an adaptor cable.
Stereo Audio Cables
The three-contact TRS arrangement can also carry stereo audio.
Typical stereo wiring may use:
Tip: Left
Ring: Right
Sleeve: Common return
Applications may include:
- Headphone cables
- Stereo monitoring
- Stereo equipment outputs
- Audio-interface headphone systems
The exact wiring must match the equipment.
Professional Headphone Cables
6.35mm TRS is widely used for professional headphones.
The NP3X can therefore be used when manufacturing or repairing compatible:
- Studio headphone cables
- Headphone extension leads
- Monitoring cables
- Cue-system cables
Check cable dimensions carefully, particularly with specialised multi-conductor headphone cable.
Insert Leads
Many professional mixing consoles use a single 6.35mm TRS socket for:
Insert send and return.
An insert lead commonly breaks this TRS connection out into two separate signal paths.
Typical convention may be:
Tip – Send
Ring – Return
Sleeve – Common ground
However, not every manufacturer follows the same convention.
Always verify equipment documentation.
Studio Patch Leads
The NP3X is particularly well suited to professional studio patch cables because of its slim:
14.5mm housing.
Where several TRS plugs sit side by side, connector width becomes a practical consideration.
The NP3X combines compact size with a metal shell and professional strain-relief system.
Mixing Consoles
Professional mixing consoles commonly use 6.35mm TRS connectors for:
- Balanced line inputs
- Line outputs
- Insert points
- Auxiliary connections
- Monitor outputs
- Other equipment-specific I/O
The NP3X provides a field-serviceable professional connector for compatible equipment.
Audio Interfaces
Professional audio interfaces frequently provide TRS connections for:
- Balanced line outputs
- Line inputs
- Monitor outputs
- Headphone outputs
The NP3X can be used to manufacture custom cables matched to the interface and connected equipment.
Signal Processors
Professional processors may use TRS for:
- Inputs
- Outputs
- Insert connections
- Control or equipment-specific interfaces
Potential equipment includes:
- Equalisers
- Compressors
- Crossovers
- DSP systems
- Effects processors
Always confirm the equipment’s electrical configuration before wiring.
Professional Amplifiers
Some professional amplifiers use 6.35mm TRS connectors for balanced signal inputs.
The NP3X can be used for these line-level connections where specified by the manufacturer.
Do not confuse line-level TRS connections with equipment-specific speaker outputs that may also use phone-style connectors.
Recording Studios
Professional recording environments are one of the strongest markets for NP3X.
Potential uses include:
- Patch leads
- Balanced interconnects
- Headphone systems
- Insert cables
- Outboard processing
- Audio-interface cables
- Monitor systems
Its slimline format is particularly useful in equipment-dense studio installations.
Broadcast
Broadcast systems may use 6.35mm TRS across:
- Audio racks
- Monitoring systems
- Studio equipment
- Patch infrastructure
- Headphone systems
- Legacy equipment
The professional metal construction and serviceable solder termination suit technical environments where cables may be maintained in-house.
Theatre
Theatre audio systems may use TRS connections throughout:
- Playback equipment
- Audio interfaces
- Mixing systems
- Wireless racks
- Monitor systems
- Technical racks
- Orchestra-pit equipment
The NP3X allows venue technicians to build and repair professional cables as required.
Touring and Live Sound
Touring cables experience repeated:
- Connection
- Disconnection
- Coiling
- Transport
- Deployment
- Pack-down
The NP3X combines:
- Metal housing
- Precision-machined contacts
- Chuck-type strain relief
- More than 1,000 mating cycles
for professional repeated-use cable assemblies.
Film and Television
Film and television audio departments may use ¼-inch TRS connections in:
- Location audio equipment
- Production carts
- Playback systems
- Monitoring equipment
- Studio systems
- Technical racks
The NP3X provides a professional solderable connector where compatible equipment requires a straight TRS plug.
Professional AV
Professional AV systems commonly use balanced TRS for:
- Mixer connections
- DSP systems
- Audio interfaces
- Installed audio
- Conference equipment
- Amplifiers
- Control-room infrastructure
The NP3X allows custom cable assemblies to be built for these systems.
Audio Snakes and Multicores
Neutrik includes audio cables and snakes among the applications for its Plug X Series.
Where a snake or breakout system terminates to ¼-inch TRS, NP3X provides a professional connector option.
The maximum cable diameter remains:
4–7mm
for the standard connector.
Chuck-Type Strain Relief
The NP3X incorporates Neutrik’s proven:
Chuck-type strain relief.
The internal chuck clamps around the cable jacket when the connector is assembled.
This helps transfer pulling and movement forces into the connector body rather than directly into the solder joints.
Why Strain Relief Matters
Without suitable mechanical cable retention, forces applied to the cable may be transferred to the solder connections.
Over time this can contribute to:
- Broken conductors
- Intermittent connections
- Solder-joint failure
- Cable faults
A proper strain-relief system helps mechanically secure the cable independently of its electrical terminations.
4–7mm Cable O.D.
Neutrik specifies:
Cable O.D.: 4–7mm.
This covers a wide range of professional:
- Balanced audio cable
- Stereo cable
- Headphone cable
- Patch cable
- Signal cable
Always check the actual cable diameter before assembly.
BPX-L for Larger Cable
Neutrik offers the optional:
BPX-L
large bushing with chuck-type strain relief.
This accessory allows compatible PX connectors to accommodate cable diameters of approximately:
7–8mm.
It can be useful where the selected cable slightly exceeds the standard NP3X range.
Maximum Conductor Size
Neutrik specifies:
1.0mm²
or:
18 AWG
maximum conductor size.
Most professional balanced-audio cables use substantially smaller individual conductors, but this defines the connector’s maximum accepted conductor size.
Solder Termination
The NP3X uses:
Solder contacts.
Professional assembly should include:
- Correct cable stripping
- Clean conductor preparation
- Correct tip/ring/sleeve identification
- Controlled soldering temperature
- Proper solder flow
- No solder bridges
- No stray strands
- Correct strain-relief assembly
Neutrik specifies solderability in accordance with:
IEC 68-2-20.
Contact Resistance Depends on the Mating Connector
Neutrik does not publish one fixed contact-resistance figure for the NP3X by itself.
Its current specification states:
Contact Resistance: Depends on mating connector.
This reflects the fact that the electrical connection is formed between both:
- Plug
- Socket
The mating jack therefore contributes to overall contact performance.
Rated Current Depends on the Mating Connector
Neutrik likewise specifies:
Rated Current Per Contact: Depends on mating connector.
A generic amp rating should therefore not be assigned to the NP3X alone.
The electrical capability of the complete connection depends on:
- NP3X plug
- Mating jack
- Cable
- Equipment
- Application
Rated Voltage Below 50V
Neutrik specifies:
Rated Voltage: <50V.
The NP3X is intended for professional low-voltage audio and signal applications.
It is not designed for:
- Australian 230/240V mains power
- Appliance power
- Lighting mains power
- General electrical distribution
1kV DC Dielectric Strength
Neutrik specifies:
Dielectric Strength: 1kV DC.
This is an electrical test specification.
It does not mean the connector has a 1kV working-voltage rating.
The published rated voltage remains:
<50V.
Insulation Resistance
Neutrik specifies:
>2GΩ initial insulation resistance.
More Than 1,000 Mating Cycles
The NP3X is specified for:
More than 1,000 mating cycles.
This makes it appropriate for professional cables that are regularly patched and unplugged.
Actual service life also depends on:
- Mating jack condition
- Handling
- Contamination
- Cable strain
- Maintenance
Nickel Contact Plating
The NP3X uses:
2µm nickel-plated contacts.
The contact base material is:
CuZn39Pb3 brass.
For customers wanting gold contacts instead, Neutrik offers the:
NP3X-B
variant.
PA6.6 Glass-Reinforced Insert
The internal connector insert is manufactured from:
Polyamide PA6.6 with 30% glass reinforcement.
This supports and electrically isolates the contact elements.
POM Strain Relief
The internal chuck strain-relief component is manufactured from:
Polyacetal POM.
POM + PU Bushing
Neutrik specifies the rear bushing as:
Polyacetal POM + polyurethane.
This forms part of the connector’s cable-support system.
Operating Temperature
Neutrik specifies:
-20°C to +65°C.
The completed cable may have a different operating range according to the cable used.
The lowest-rated component should determine the environmental limit of the complete assembly.
IEC 60603-11 Compliance
Neutrik specifies the NP3X to:
IEC 60603-11.
EIA RS-453 Compliance
Neutrik also specifies compatibility with:
EIA RS-453.
These standards relate to professional phone-plug connector formats.
Straight vs Right-Angle
The NP3X is the straight version.
Neutrik also manufactures:
NP3RX
as the corresponding right-angle version with nickel housing and nickel contacts.
NP3X
Choose where:
- Straight cable exit is preferred
- Rear clearance is adequate
- Slim high-density construction is important
NP3RX
Choose where:
- Equipment clearance is restricted
- A right-angle cable path is preferred
- Pedalboard or rack depth needs to be minimised
Both use a 3-pole TRS architecture.
NP3X vs NP3XL
Neutrik also offers:
NP3XL jumboPLUG
for applications requiring substantially larger cable.
NP3X
Cable O.D.: 4–7mm
Design Priority: Extra-slim, high-density connection
NP3XL
Cable O.D.: Up to 10mm
Design Priority: Thick cable capacity
Choose according to the actual cable being terminated.
Colour-Coded Boots
Neutrik offers optional:
BPX coloured boots
for PX Series connectors.
These can identify cables by:
- Length
- Signal type
- Department
- Equipment
- Production
- Ownership
PXR Identification Rings
Neutrik also offers:
PXR coloured marking rings
with a flat surface that can be used for additional identification.
This can be particularly useful in professional cable inventories.
Cable Identification in Touring Environments
Production and equipment-hire companies may use colour-coded components to distinguish:
- Balanced cables
- Insert leads
- Stereo cables
- Different cable lengths
- Department stock
- Special-purpose leads
Clear identification can make setup and pack-down more efficient.
Professional Cable Assembly
When assembling NP3X:
- Confirm the equipment requires a 3-pole TRS connection.
- Confirm the intended wiring configuration.
- Verify cable O.D. is within the supported range.
- Slide the bushing and strain-relief components onto the cable.
- Strip the cable correctly.
- Prepare the conductors.
- Identify tip, ring and sleeve terminals.
- Solder each conductor cleanly.
- Inspect for stray strands or solder bridges.
- Position the chuck strain relief around the cable jacket.
- Assemble and tighten the connector.
- Test the completed cable.
Test Every Completed TRS Cable
At minimum, verify:
- Tip-to-tip continuity
- Ring-to-ring continuity
- Sleeve-to-sleeve continuity
- No tip-to-ring short
- No tip-to-sleeve short
- No ring-to-sleeve short
- Correct strain relief
- Correct mechanical assembly
For adaptor or insert cables, test against the intended wiring scheme rather than assuming straight-through wiring.
Product Specifications
Brand: Neutrik
Model: NP3X
Series: Plug X / PX Series
Product Type: Professional phone plug
Connector Size: 6.35mm / ¼ inch
Number of Poles: 3
Configuration: TRS
Gender: Male
Termination: Solder contacts
Cable O.D.: 4–7mm
Maximum Conductor Size: 1.0mm² / 18 AWG
Shell: Zinc die-cast ZnAl4Cu1
Shell Plating: Nickel
Contacts: Brass CuZn39Pb3
Contact Plating: 2µm nickel
Insert: PA6.6, 30% glass reinforced
Strain Relief: Polyacetal POM
Bushing: POM + PU
Housing Width: 14.5mm
Suitable Jackfield Pitch: 15.88mm
Contact Resistance: Depends on mating connector
Rated Current: Depends on mating connector
Rated Voltage: <50V
Dielectric Strength: 1kV DC
Insulation Resistance: >2GΩ initial
Mechanical Life: >1,000 mating cycles
Temperature Range: -20°C to +65°C
Standard Compliance: IEC 60603-11 / EIA RS-453
Solderability: IEC 68-2-20 compliant
Optional Large-Cable Bushing: BPX-L for 7–8mm cable O.D.
Why Choose the Neutrik NP3X?
Choose the NP3X where a professional 6.35mm cable requires:
- Genuine Neutrik quality
- 3-pole TRS construction
- Balanced, stereo or insert wiring capability
- Nickel-plated metal shell
- 2µm nickel-plated brass contacts
- Precision-machined one-piece contact design
- No separate riveted tip
- Extra-slim 14.5mm housing
- 15.88mm high-density jackfield compatibility
- Proven chuck-type cable strain relief
- 4–7mm standard cable compatibility
- Up to 1.0mm² / 18 AWG conductors
- Solder termination
- More than 1,000 mating cycles
- Optional colour-coded boots and identification rings
- Professional field-serviceable construction
It is particularly useful for balanced audio, studio patching, headphone, insert and professional interconnect cables where compact dimensions and dependable cable retention matter.
Why Buy Neutrik NP3X from GigLife?
GigLife supplies professional connectors, adaptors, cables, tapes, consumables and technical accessories specifically for the entertainment and production industries.
With more than 25 years of hands-on live entertainment industry experience, GigLife understands that a ¼-inch connector may look simple, but selecting the correct TS or TRS configuration, cable size, wiring and strain relief is critical to building reliable professional audio cables.
Products are selected by people who work in production and understand the requirements of:
- Audio engineers
- FOH engineers
- Monitor engineers
- Musicians
- Theatre technicians
- Touring crews
- Production companies
- Recording studios
- Broadcast facilities
- Film and television departments
- AV technicians
- Festivals
- Schools and performing arts centres
- Conference production
- Exhibition contractors
- Equipment-hire businesses
- Cable manufacturers and repair workshops
Whether you are building balanced TRS cables, manufacturing studio patch leads, repairing headphone cables, building insert leads or restocking a professional technical workshop, GigLife supplies genuine components selected by people who understand the job.
Orders are dispatched from Brisbane, with Australia-wide shipping available.
GigLife is proudly by the professionals… for the professionals.
