NL4FX SPEAKON CONNECTOR NEUTRIK

NL4FX SPEAKON CONNECTOR NEUTRIK – 4-Pole SPX Series Lockable Cable Loudspeaker Connector

The NL4FX SPEAKON CONNECTOR NEUTRIK (manufactured by Neutrik, part reference NL4FX / SPX Series) is an industry-standard 4-pole female cable loudspeaker connector. Engineered for high-power audio amplifiers and passive loudspeaker connections, the NL4FX SPEAKON CONNECTOR NEUTRIK delivers a continuous current rating of $40text{ A RMS}$ ( $50text{ A}$ audio signal at $50%$ duty cycle) to ensure signal transfer for setups exceeding $1000text{ W}$ .

As shown in the product image, the connector features a dark grey bushing, a high-impact PBTP glass-reinforced housing, a zinc diecast release latch, and a blue color-coded accent ring. Designed with only three assembly parts, it incorporates Neutrik’s Quick Lock twist-locking mechanism and chuck-type strain relief for maximum cable retention force.

Key Features of the NL4FX SPEAKON CONNECTOR NEUTRIK

High Current Carrying Capacity: Rated for $40text{ A RMS}$ continuous current per contact ( $50text{ A}$ audio signal) at $250text{ V AC}$ rated insulation voltage.
Quick Lock System: Features an ergonomic metal latch mechanism providing a precise twist-lock mating system that prevents accidental disconnection.
Chuck-Type Strain Relief: Includes a 1-piece polyacetal chuck strain relief designed for cable outer diameters ranging from $7.0text{ mm}$ to $14.5text{ mm}$ , yielding cable retention force $ge 220text{ N}$ .
Versatile Termination Options: Equipped with screw-type terminals with stranded wire protection for wires up to $4text{ mm}^2$ ( $12text{ AWG}$ ), or solder termination for wires up to $6text{ mm}^2$ ( $10text{ AWG}$ ).
3-Piece Streamlined Assembly: Composed of three main parts (housing, chuck, and bushing) for quick field wiring and assembly.
Durable Construction: Built with glass-reinforced PBTP materials, silver-plated brass contacts, and a UL 94 HB flammability rating.

Common Applications and Industrial Usage

The power handling and durability of the NL4FX SPEAKON CONNECTOR NEUTRIK make it a preferred standard across professional sound systems:

Live Sound & Concert PA Systems: Connects high-power multi-way loudspeakers, subwoofers, and stage monitors to power amplifier racks.
Touring & Event Production: Deployed in demanding touring rigs where secure twist-locking and high cable strain relief prevent accidental disconnects.
Bi-Amping & Multi-Channel Speaker Cabling: Utilizes its 4-pole configuration ( $1+ / 1-$ and $2+ / 2-$ ) for bi-amplified speaker systems carrying low-frequency and high-frequency channels over a single 4-conductor cable.
Permanent Commercial Audio Installations: Used in venues, auditoriums, stadiums, and theaters requiring reliable speaker cabling.

Technical Specifications

The electrical, mechanical, and material specifications for the NL4FX SPEAKON CONNECTOR NEUTRIK include:

Parameter Specification	Technical Details & Operational Values
Component Classification	4-Pole Female Cable speakON® Connector
Primary Target Keyword	NL4FX SPEAKON CONNECTOR NEUTRIK
Manufacturer / Part Reference	Neutrik / `NL4FX` (SPX Series)
Continuous Current Rating	$40text{ A RMS}$ Continuous ( $50text{ A}$ audio @ $50%$ duty cycle)
Rated Insulation Voltage	$250text{ V AC}$
Dielectric Strength	$4text{ kV DC}$ peak
Contact Resistance	$< 2text{ m}Omega$ (after lifetime)
Number of Contacts	$4$ Brass Contacts ( $4 mutext{m Ag}$ Silver Plating)
Cable Outer Diameter (O.D.)	$7.0text{ mm to }14.5text{ mm}$
Wire Size Capacity	Screw: $4text{ mm}^2$ ( $12text{ AWG}$ ) / Solder: $6text{ mm}^2$ ( $10text{ AWG}$ )
Mating Cycles / Retention Force	$> 5,000$ Mating Cycles / Cable Retention $ge 220text{ N}$
Operating Temperature	$-30^circtext{C to }+80^circtext{C}$

Assembly Guidelines and Best Practices

Safety Warning: speakON® connectors are strictly intended for audio loudspeaker signals and MUST NOT be used as AC mains power connectors or for interrupting live current.

Cable Stripping: Strip the outer cable jacket by $25text{ mm}$ and individual conductor ends by $12text{ mm}$ .

Terminal Fastening: Secure stripped wire ends into screw terminals using a Pozi 1 or flathead screwdriver; apply proper torque to ensure a low-resistance contact.

Chuck Alignment: Slide the chuck strain relief over the cable before screwing the rear dark grey bushing onto the main housing shell until fully tightened.

To review official international pro audio connector standards and IEC electrical testing specifications, consult the official IEC 61984 Connectors Safety Requirements Directory.

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