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The NEUTRIK NL4FX speakON 4-Pole Cable Connector is the locking, high-current speaker connector for PA, installs and stage rigs, rated 40 A continuous.
4-pole speakON cable connector, industry standard for speakers
The NEUTRIK NL4FX speakON 4-Pole Cable Connector is the industry-standard locking cable connector for loudspeakers and power amplifiers, built for high-power pro audio where a connection must never fail mid-show. As the third-generation speakON SPX series connector, the NEUTRIK NL4FX carries 40 A RMS continuous current per contact, 50 A on audio signal, and uses a chuck-type strain relief that accepts cables from 6 to 14 mm, all in a three-piece design that assembles quickly and locks with Neutrik’s precise Quick Lock system. For PA hire, installs, stage rigs and studio speaker wiring, the NEUTRIK NL4FX is the connector that professionals reach for first.
Why Choose the NEUTRIK NL4FX speakON 4-Pole Cable Connector?
Speaker connections carry real power, and a connector that works loose, overheats or pulls apart is a show-stopper and a safety risk. The NEUTRIK NL4FX answers with solid contacts on screw-type terminals, a locking system that cannot vibrate free, and a current rating that handles amplifiers over 1,000 W with margin. Its three-piece construction and one-piece strain relief make assembly fast and repeatable, so a whole rack of speaker cables can be built or repaired consistently, and the optional colour-coded boots let crews identify circuits at a glance. Once a rig is wired with the NEUTRIK NL4FX, speaker connectivity stops being something to worry about.
Key Features
4-pole speakON cable connector: The industry-standard locking connector for loudspeaker and amplifier connections.
High current rating: 40 A RMS continuous and 50 A audio signal per contact, for amplifiers over 1,000 W.
Quick Lock system: An extremely precise, easy locking mechanism that cannot vibrate loose during a show.
Chuck-type strain relief: A one-piece strain relief accepting 6 to 14 mm cables, protecting the termination from pulls.
Only three parts: A simple three-piece design that is fast to assemble, inspect and repair.
Screw or solder termination: Solid contacts with screw-type terminals, including stranded-wire protection, plus solder termination.
Best Suited For
The NEUTRIK NL4FX suits PA hire companies, live sound engineers, installers and venue technicians wiring loudspeakers to power amplifiers, as well as studios and rehearsal rooms building their own speaker cables. It is the right choice wherever speaker cables are coiled, dragged, plugged and unplugged daily, and where a locking, high-current connection is a safety and reliability requirement rather than a luxury.
Setup and Connection Guide
Strip the speaker cable to the length shown in the Neutrik assembly guide, slide the bushing and chuck over the cable, and terminate the four conductors on the screw terminals, observing the standard 1+/1- wiring for single circuits or 1+/1-, 2+/2- for bi-amped circuits. Tighten the terminals firmly, slide the chuck into the housing so the strain relief grips the cable jacket, and close the three-piece assembly. To mate, align the connector with the speakON chassis socket, push in and twist until the Quick Lock engages, and confirm the lock by tugging gently. To release, pull back the latch sleeve and twist out; never force a locked speakON connector.
Frequently Asked Questions
What current can the NEUTRIK NL4FX handle?
The NEUTRIK NL4FX is rated at 40 A RMS continuous per contact and 50 A on audio signal with a 50 percent duty cycle, making it suitable for high-power loudspeakers and amplifiers over 1,000 W.
What cable sizes fit the NEUTRIK NL4FX?
The NEUTRIK NL4FX chuck-type strain relief accepts cables from 6 mm to 14 mm in diameter.
Is the NEUTRIK NL4FX a straight or right-angle connector?
The NEUTRIK NL4FX is the straight cable connector. A right-angle version, the NL4FRX, exists separately, and a quick-change kit can convert between straight and right-angle forms.
Technical Specifications
Connector type
speakON 4-pole cable connector, straight
Series
Neutrik speakON SPX, third generation
Rated current
40 A RMS continuous per contact; 50 A audio signal (50 percent duty cycle)
Contacts
Solid contacts, screw-type terminals with stranded-wire protection; solder termination also possible
Strain relief
Chuck-type, one piece, for 6-14 mm cables
Locking system
Quick Lock, twist-to-lock
Construction
Three pieces; high-impact materials; colour-coded boot optional
Variants
Straight (NL4FX); right-angle (NL4FRX); quick-change kit available
Buy with peace of mind. The NEUTRIK NL4FX speakON 4-Pole Cable Connector comes with the official manufacturer’s warranty for India, valid from the date on your GST invoice. Pro Audio Video is a specialist audio video store, and every product we sell is brand new, sealed and sourced through authorised channels, so your warranty is honoured at brand service centres across India.
Official Indian warranty, as specified by the manufacturer
GST invoice with every order, needed for warranty claims
We help you raise and follow up warranty claims with the brand
Delivery and Shipping
Same-day dispatch on most in-stock orders
Delivery anywhere in India; delivery time depends on your location
Shipped securely in the original manufacturer box
Cash on delivery available on orders up to ₹45,000
Tracking details by SMS and email as soon as your order ships
Returns and Refunds
Not right for you? Return unused products in their original packaging within 7 days of delivery. If a product arrives damaged or defective, tell us within 48 hours with photos and we will replace it or refund you in full.
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