Loudspeaker Connectors

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Speakon SPX Series 4 Pole Cable Connector ................

Speakon FC Series, 2, 4 and 8 Pole Cable Connector ....
Speakon Adapter .........................................................
Speakon Chassis Connector ........................................
Speakon Combo ........................................................

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53
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Speakon STX Series Cable Connector ...........................

Speakon STX Series Chassis Connector .........................
Technical Data .............................................................
Wiring .........................................................................

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Quick lock

Chuck type strain

relief

Speakon

Introduction
The Neutrik Speakon Series, in the Pro Audio industry often
called "The loudspeaker connector", became the state of the art
for speaker and amplifier connections.
Invented by Neutrik as a result of various customer requests,
the first Speakon had been introduced in 1987. The pro audio
market realized very quickly the advantages of this completely
new connection system. The design has been optimized for
loudspeaker applications with an outstanding cost-performance
ratio.
As market leader for speaker connections we are proud to
offer an all-embracing product line for the specific needs of this
market today. Latest designs as the STX series or the Speakon
Combo also meet the demands of niche applications or extremely
rough conditions and complete the product range.

Features & Benefits

Today's Speakon series is a result of a continuous product
improvement process. The principal idea has been kept and optimized with material and design modifications over the years.

Integrated Design
Neutrik's aim to be distinctively recognizable is realized by the
technological head start on the one hand as well as both patent and trademark
protection on the
other hand. To
draw a clear line
between Neutrik
and competition
products we give
our customer the
possibility to easily
identify the original. Therefore all of our new products as the SPX and the STX
series are designed according the protected integrated design.
(EU-Pat.: DM/057 379, US-Pat. Pending, CHINA-Pat.: 0230519
2.2/193.0/194.9/195.7)

look for the logo

A traditional Speakon stands for:

L Reliable and robust, easy and fast to assemble
L 2, 4 and 8-pole cable and chassis connectors in various
versions
L Optimal "Quick Lock" system for speaker applications
L Neutrik proven and unique chuck type cable strain relief
L Outstanding cost-performance ratio
L Defacto standard
L Meets all Worldwide Safety requirements (IEC, UL, ...)
Beyond that, the latest designs as the SPX and STX series
offer:
L Up to 50 Amps current rating
L Only 3 parts with 1 piece strain relief design for even easier
assembly
L Convertable right-angle version
L Weatherproof and extremely robust all metal design
L Complete system, 4 pole female chassis and male cable
connector

Right angle
conversion

SPX Series 4 Pole Cable Connector

NL4FX

NL4FRX

Features
L

50

Up to 50 A current rating

Only 3 parts, easy to assemble

Improved SPX-Series screw contacts! (Wire position after assembly.)

1
2
5

High Impact Materials

1 Easy and extremely precise locking system

"Quick Lock"
2 Improved grip on latch
3 1 piece strain relief, chuck for 6 to 14.5 mm
cable O.D.
4 Color coding possible
5 Integrated design guaranties "Made by
Neutrik"

1 Progressive clamping as wire is pushed forward

2 Acts as screw locking device due to side forces
3 Large combi drive - M4 screw
4 Wire size 1.5 - 4 mm2 (AWG 12)
for 6 mm2 (AWG 10) remove screw & solder
5 Pull out force > 300 N @ 80 cNm
6 Gas tight connection

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Locking ring
NL4FX

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Quick lock

NL4F

Speakon

Design Criteria
This second generation of Speakon connectors features
higher current rating for the operation of high power speakers and amplifiers carrying more than 1000 Watts. Only 3
parts make it fast and easy to assemble with a more reliable

FC Cable Connector Series

performance. Our unique design makes it possible to change

easily and quickly from a straight connector to the right-angle
version, even without disconnecting the cable.

Assembly
Prepare cable as shown.
    
    

HINT:
For easy wiring especially
on big cables, first screw
on the inner contacts 1+
and 2+ and afterwards the
outer contacts 1- and 2- !
Use screwdriver Pozidrive #1 only.

NL2FC

L

NL4FC

4 pole - Branded with unique hologram - guarantees genuine

NL8FC

NL2FC

and authentic Neutrik product

Ordering Information
NL4FX
NL4FX-2
NL4FX-4
NL4FX-5
NL4FX-9
NL4FRX

Cable Connector with chuck and bushing

Cable Connector with chuck and red bushing
Cable Connector with chuck and yellow bushing
Cable Connector with chuck and green bushing
Cable Connector with chuck and white bushing
Right-angle Cable Connector with chuck and bushing

L

Up to 30 A rms current rating

L

Glass reinforced materials for housing and inserts

L

Unique Neutrik chuck type strain relief

L

Precise keyway for secure mating

L

Accurate twist lock latching system

L

4 pole in new design with more ergonomic latch

NL4FC

Keying:

Accessories

NL8FC
NL2MP
NL4MP

NL2FC

LCR-*

LCR-*
LRX

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LRX

Coloured coding rings for the right-angle version of the SPX Series. Available in blue (Standard),
white, red, green and yellow.
Right-angle Speakon Conversion Kit for changing the straight connector into a right-angel version without
removing the cable from the insert.

look for the logo

4FC

Ordering Information
NL2FC
NL4FC
NL8FC

2 pole Cable Connector with locking ring, integrated cable clamp, intermates with 4-pole chassis
connector and makes contact with +1/-1
4 pole Cable Connector with latch lock
8 pole Cable Connector with latch lock

www.neutrik.com

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1/4" Jack adapter

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Extention coupler

Reinforced
locking area

Speakon

NA4LJX

Adapter

NL4MMX

3/16" flat tabs

Speakon

NL8MM

NA4LJ
NL4MMX
Features permanent secure connection
on a Speakon cable connector using
2nd lock.

NL4MMX
Secure Lock!
NL4MMX + NL4FX
(locked on the cable)
NL8MM

Changes gender to male when

permanently locked on the
cable.

Nickel housing

NL2MP

NL4MD-H-1

S e r i e s

Vertical PCB
mount

Chassis Connector

NL4MD-H-3

Standard version up to 30 A rms, ultra high current version

up to 50 A audio current
L Glass reinforced materials
L Precise keyway for secure mating
L Accurate twist lock latching system
L Metal front plate (8-pole) or metal insert in locking area
(2 & 4-pole)
L Various mounting and wiring possibilities
L "Air tight design", optimized for speaker applications
L D or G panel cutouts to be easily mounted on audio industry
standard panels
L

NL4MPR

NL8MPR

NL4MP

NL4MPR

NL4MD-V

NL8MPR
NL4MD-H

Ordering Information
NA4LJX
NL4MMX
NL8MM

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Adapter from Speakon Cable Connector to 2 pole 1/4" Jack, wiring: +1 to TIP and -1 to SLEEVE
4 pole lockable coupler to extend two 4-pole cables
8 pole coupler to extend two 8-pole cables

look for the logo

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Ordering Information
Flange layout:

Hole layout:

D-size
standard
hole

Pole

NL2MP
NL2MD-H
NL2MD-V
NL4MP
NL4MP-1
NL4MP-2
NL4MP-3
NL4MP-M3
NL4MD-H
NL4MD-H-1
NL4MD-H-2
NL4MD-H-3
NL4MD-V
NL4MD-V-1
NL4MD-V-2
NL4MP-ST
NL4MP-UC
NL4MPR
NL8MD-V
NL8MD-V-BAG
NL8MD-V-1
NL8MPR
NL8MPR-BAG
NLT4MP
NLT4MP-BAG
NLT4MD-V
NLT4FP
NLT4FP-BAG
NLT8MP
NLT8MP-BAG

2
2
2
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
8
8
8
8
8
4
4
4
4
4
8
8

Flange size

D-size
mirrored hole
position

Flange layout

D-size
D-size
D-size
D-size
D-size
D-size
D-size
D-size
D-size
D-size
D-size
D-size
D-size
D-size
D-size
D-size
D-size
round G-size flange
square G-size flange
square G-size flange
square G-size flange
square G-size flange
square G-size flange
square G-size flange
square G-size flange
square G-size flange
square G-size flange
square G-size flange
square G-size flange
square G-size flange

G-size flange
with four
holes

A
A
A
A
A
B
A
A
A
A
B
A
A
A
B
A
A
C
C
C
C
C
C
C
C
C
C
C
C
C

Hole layout

Color

D
D
D
D
E
E
E
F
E
D
E
E
D
E
E
D
D
D
D
D
E
D
D
D
D
E
D
D
D
D

black
black
black
black
grey
black
black
black
grey
black
black
black
black
grey
black
black
black
black
Ni
black chrome
Ni
Ni
black chrome
nickel
black chrome
nickel
nickel
black chrome
nickel
black chrome

Thru holes

Self tapping
screw holes
(A-screw)

Metal M3
thread

PCB solder pins

Wiring

Remarks

3/16" flat tabs*

horizontal PCB
vertical PCB
3/16" flat tabs*
3/16" flat tabs*
3/16" flat tabs*
3/16" flat tabs*
3/16" flat tabs*
horizontal PCB
horizontal PCB
horizontal PCB
horizontal PCB
vertical PCB
vertical PCB
vertical PCB
screw terminal
1/4" flat tabs*
3/16" flat tabs*
vertical PCB
vertical PCB
vertical PCB
3/16" flat tabs*
3/16" flat tabs*
1/4" flat tabs*
1/4" flat tabs*
vertical PCB
solder contacts
solder contacts
1/4" flat tabs*
1/4" flat tabs*

Does not intermate with 4-pole cable connector

Does not intermate with 4-pole cable connector
Does not intermate with 4-pole cable connector

Locking key

Speakon

Combo

NLJ2MD-V

Combines a Speakon
and 1/4" Phone Jack - one for two

Ultra high current, up to 40 A rms

L

D-size flange

L

Compatible PCB layout and panel mount to NL4MD-V-1

NLJ2MD-V

(NL4MD-H)
L

Cost saving - combines two connectors in one housing

L

Mates with all 2, 4-pole Speakon and 1/4" Phone Plugs

L

PA-wiring: 1+ is connected to TIP, 1- to the SLEEVE

*: flat tabs to be used with FASTON connectors or to solder the wire (FASTON is a trademark of AMP Inc.)

Accessories

Ordering Information
NLJ2MD-V
NLJ2MD-H

NLFASTON

NLFASTON
A-Screw-1-8
SCL
SCDX

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A-Screw-1-8

SCL

SCDX

FASTON receptacle for tabs with "positiv lock" for use with NL4MP, NL4MPR, NL8MPR, Pack of 100 pcs.
Black self tapping PLASTITE screw 2.9 x 8 for rear panel mount
Plastic sealing cover to protect the connectors against dust and moisture
Hinged cover seals D-size chassis connectors, IP54 rated

look for the logo

2 pole Chassis Connector, vertical PCB mount

2 pole Chassis Connector, horizontal PCB mount

Assessories
A-Screw-1-8
SCL
SCDX

Black self tapping Plastite screw 2.9 x 8 for rear panel mount
Plastic sealing cover to protect the connectors against dust and moisture
D-size hinged cover

www.neutrik.com

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Reinforced
locking

Latch lock

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XL-solder contacts

Speakon

NLT4FX-BAG

Robust metal
housing

Speakon

NLT8FX

STX Series Chassis Connectors

NLT4FP-BAG

L

Features

S e r i e s

XL-solder contacts

STX Series Cable Connectors

NLT4MX

NLT4MP

Extremely robust metal housing designed for harsh and

NLT4MD-V

NLT8MP-BAG

NLT4FP

demanding environment
Up to 50 A current rating

Only 3 parts, easy to assemble

NLT4FX

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NLT8FX

look for the logo

All metal housing

IP 54 sealing gasket

1 Easy and extremely precise locking system

"Quick Look", reinforced with metal
2 Improved grip on latch
3 1 piece strain relief, chuck for cables from
9 to 16 mm O.D.
4 Extreme rugged "Touring Approved"
5 Rubber sealing boot
6 Integrated Design garanties "Made by
Neutrik"
7 X-large solder contacts for up to 6 mm2
(AWG 10) wires

L

Weatherproof design features sealing gaskets

L

4 type range - also male cable connector and female receptacle

on 4-pole version

L

All-metal housing makes the STX Series rugged and durable

L

Weatherproof built-in gasket meets IP 54 protection class (4 pole)

L

Ideal product for touring applications and harsh environments

L

Best electrical performance up to 50 Amps audio current

L

Uses precise Quick Lock system

L

Mates with all currently available Speakon products

L

4 pole version has UL Recognized components, CSA listed

NLT4MP

NLT8MP

www.neutrik.com

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T e c h n i c a l

Design Criteria

Specification

The new Speakon STX Series is the next generation of 4 & 8

pole Speakon connectors especially designed for loudspeaker
- amplifier applications in harsh and demanding environment
such as professional touring.
The STX Series features a metal housing which is extremely

rugged and durable; built-in gaskets make it weatherproof.

This new series offers beside the female cable connector and
male receptacle now also a 4 pole male cable and female chassis connector.

Cable Connectors
pole
pole
pole
pole

SPX
STX
Speakon Speakon
Series
Series
FC
Chassis +
Cable Con. Cable Con. Cable Con Combo

NLT4FX
NLT4FX-BAG
NLT4MX
NLT4MX-BAG

4
4
4
4

female cable connector,nickel metal housing, chuck and bushing

female cable connector, black-chrome metal housing, chuck and bushing
male cable connector, nickel metal housing, chuck and bushing
male cable connector, black-chrome metal housing, chuck and bushing

NLT8FX
NLT8FX-BAG

8 pole female cable connector, nickel metal housing, chuck and bushing
8 pole female cable connector, black-chrome metal housing, chuck and bushing

Receptacles
pole female chassis connector, nickel metal housing, solder contacts
pole female chassis connector, black-chrome metal housing, solder contacts
pole male chassis connector, nickel metal housing, 1/4" flat tabs*
pole male chassis connector, black-chrome metal housing, 1/4" flat tabs*
pole male chassis connector, nickel metal housing, PCB contacts

40 A rms continuous
50 A audiosignal, duty cycle 50%
Combo:
15 A rms continuous
Rated insulation voltage:
250 V ac
Contact resistance after lifetime: < 2 m7
Insulation resistance after dampheat: > 1 G7
Dielectric strength:
4 kV peak
1/4" Jack:
1.5 kV peak

Locking System:
Life time (mating cycles) :
Cable O.D. range:

4
4
4
4
4

NLT8MP
NLT8MP-BAG

8 pole male chassis connector, nickel metal housing, 1/4" flat tabs*
8 pole male chassis connector, black-chrome metal housing, 1/4" flat tabs*

I nsertion / withdrawal force:

*: flat tabs to be used with FASTON connectors or to solder the wire (FASTON is a trademark of AMP Inc.)

Cable retention force:

Solderability:

Adapter

STX
Series
Chassis

4+8

4+8

2, 4, 8
30 A
40 A

2, 4, 8
30 A
40 A
-

2, 4, 8
20 A
30 A
-

b3

b3

b3

> 10 G7

> 10 G7

z
z

Mechanical

NLT4FP
NLT4FP-BAG
NLT4MP
NLT4MP-BAG
NLT4MD-V

Electrical
Number of contacts:
Rated current per contact:

Ordering Information

D a t a

Wiring:

z
Quick lock (latch)
> 5`000
z
mm
2 Pole
4 Pole
7 - 14.5
8 Pole
screw type terminals
4 mm2 (AWG 12)
soldering
6 mm2 (AWG 10)
flat tabs for 3/16"FASTON (4.8 x 0.5 mm) flat tabs for 1/4" FASTON (6.3 x 0.8 mm) PCB-version
Combo Jack: b20 N / > 10 N
r220 N*
z
z
complies with IEC 68-2-20

8 - 20
-

6 - 10
5 - 15
8 - 20

z (ST)

4 mm2 (AWG 12)

6 mm2 (AWG 10) 4 mm2 (AWG 12)

z
z

(UC)

*: subject to cable O.D. and material

Material

Accessories

Housing:

Insert:
Contacts:

A-Screw-1-8

SCNLT

Example: SCNLT + NL4MP

SCL

A-Screw-1-8
SCNLT

Black self tapping Plastite screw 2.9 x 8 for rear panel mount
Gasket for NLT4MP

SCL
SCDR

Plastic sealing cover to protect the connectors against dust and moisture
Rear end protection cover for D-size chassis connectors

SCDR Example: SCDR with NL4MP

(To make a cabinet with an Amphenol EP cutout airtight, the rubber scaling covers the entire hole.)

Contact plating:
Locking Element:
Chuck:
Bushing:

look for the logo

z
z

(UC)

(FP)
-

Environment
Temperature range:
Protection class:
Flammability:
Safety Requirements:
Approvals:

60

Polyamide PA 6 30% GR
PBTP 20% GR
Zinc diecast (ZnAICu1)
Polyamide PA 6 30% GR
PBTP 20% GR
Brass (CuZn39Pb3)
Bronze (CuSn6)
Spring copper
4 m Ag
Zinc diecast (ZnAI4Cu1)
Polyacetal (POM)
Polyamide (PA 6 15% GR)

-30C to +80C
IP 54 (mated condition)
IP 52 (8-pole, mated cond.)
UL94HB
EN/IEC 61984
UL-Recognized, CSA listed

4 pole

4 pole

www.neutrik.com

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W i r i n g

Wiring Suggestion

Positive signal on speaker pin "+" produces positive waveform from driver (moves cone outwardly)

AMPLIFIER

CABLE

SPEAKER

Stereo
("HiFi")

one NL4MP socket

left channel pins 1+/1right channel pins 2+/2-

NL4FC on amplifier end, four conductor

cable splits into two pairs with NL4FX on
each end

one NL4MP per speaker

left speaker pins 1+/1right speaker pins 2+/2-

POWER ("PA")
Standard

three NL4MP sockets

"A" socket:
left channel pins 1+/1"B" socket:
right channel pins 1+/1-

a two-conductor cable for each channel

with NL4FX on both ends

Bridged mono

"M" socket:
left channel pins 1+/1right channel pins 2+/2-

a special two-conductor cable, on both

ends wired to pin 1+/2+ of NL4FX

one NL4MP socket

low frequency pins 1+/1high frequency pins 2+/2-

a four-conductor cable on both ends

wired to pins 1+/1-, 2+/2- of NL4FX

one NL8MPR socket

low frequency pins 1+/1low mid frequency pins 2+/2high mid frequency pins 3+/3high frequency pins 4+/4-

"100V
application"

Stereo "HiFi"

- 2 channel wiring

Power "PA"

CABLE
























































































 
























look for the logo








NL4MP pin 1+ to speaker coil "+"

NL4MP pins 1- and 2+ to speaker coil "-"

one NL8MPR socket

low frequency pins 1+/1low mid frequency pins 2+/2high mid frequency pins 3+/3high frequency pins 4+/4-

AMPLIFIER


 






SPEAKER

- Mono briged wiring

AMPLIFIER

NL4MP pins 1+ to speaker coil "+"

NL4MP pins 1- and 2+ to speaker coil "-"

one NL4MP socket

low frequency pins 1+/1high frequency pins 2+/2-

an eight-conductor cable wired on both

ends to pins 1+/1-, 2+/2-, 3+/3-, 4+/4of NL8FC

Power "PA"

4 Way System

CABLE

SPEAKER















 

































Bi-Amp

Bi-Amp

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"+" = In phase (high) "-" = Ground (out of phase, low)

Lower numbers for lower frequencies.