Side by side

Two-pole versus four-pole speakON

Pole count does not provide a wiring map or power approval.

Computer-generated illustration, not a photograph. — P127 · Connector2-pole speakON loudspeaker connector

How they differ

2-pole speakON loudspeaker connector Read the connector family and pole count in the amplifier and speaker documentation; do not rely on a twist-lock outline.
4-pole speakON loudspeaker connector Record the exact connector designation from the equipment manual and compare the housing keying; do not assume a mating or wiring arrangement.

At a glance

Source-scoped form facts; counts, variants and unknowns are distinct
Field	2-pole speakON loudspeaker connector	4-pole speakON loudspeaker connector
Type	Connector	Connector
Family	Audio	Audio
Shape	round	round
Nominal contacts	2S102Nominal contact count; some implementations may omit populated positions. It is not a wiring map.	4S103Nominal contact count; some implementations may omit populated positions. It is not a wiring map.
Positions / cavity span	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Contact rows	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Connector role	cable socket (NL2FXX-W-S)S917Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NL2FXX-W-S. Documented role: cable socket. Current product PDF differs from olderBDA63830Arating. Preserve old source record and contextualize dates.; Not for ACmains or power supply use; not for interrupting current. Acceptance diameter6–12mm is not connector width.	cable socket (NL4FXX-W-S)S918Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NL4FXX-W-S. Documented role: cable socket. Current product PDF differs from olderBDA63830Arating. Preserve old source record and contextualize dates.; Not for ACmains or power supply use; not for interrupting current. Acceptance diameter6–12mm is not connector width.
Key distinction	Loudspeaker connection does not mean mains power.	Four poles do not specify an amplifier wiring mode.

Full evidence ledger and sources ↓

Illustrations are computer-generated with prior AI visual review; independent technical and rights review pending. A comparison is not a compatibility verdict.

This comparison stays within one evidence layer.

All selected records are Connector records. Similar layer does not mean compatible, interchangeable or safe to mate.

Families represented: Audio

Application comparison / concept only

Two-to-four is not four-to-two

Cable and chassis roles make the difference.

2-pole speakON →4-pole speakON →

Not a general compatibility verdict. S102 · S496

The reference ledger

Read the same question across.

2 selected records · 14 fields
No score. No compatibility verdict.

On a narrow screen, scroll the table sideways or open the field-by-field reading view below. Illustrations are not a size comparison.

Comparison of selected field notes; source links accompany each documented specification
What you are comparing	P127 / Connector2-pole speakON loudspeaker connector Identification schematic · not to scale · drawing review pending	P128 / Connector4-pole speakON loudspeaker connector Identification schematic · not to scale · drawing review pending
Layer	Connector	Connector
Key distinction	Loudspeaker connection does not mean mains power.	Four poles do not specify an amplifier wiring mode.
Nominal contacts	2S102Nominal contact count; some implementations may omit populated positions. It is not a wiring map.	4S103Nominal contact count; some implementations may omit populated positions. It is not a wiring map.
Positions / cavity span	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Populated contacts	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Contact rows	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Contact pitch	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Dimensions / axis	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Connector role	cable socket (NL2FXX-W-S)S917Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NL2FXX-W-S. Documented role: cable socket. Current product PDF differs from olderBDA63830Arating. Preserve old source record and contextualize dates.; Not for ACmains or power supply use; not for interrupting current. Acceptance diameter6–12mm is not connector width.	cable socket (NL4FXX-W-S)S918Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NL4FXX-W-S. Documented role: cable socket. Current product PDF differs from olderBDA63830Arating. Preserve old source record and contextualize dates.; Not for ACmains or power supply use; not for interrupting current. Acceptance diameter6–12mm is not connector width.
Coupling / latch	Twist lock; mechanically aligned insert/chuck/housing (NL2FXX-W-S)S917Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NL2FXX-W-S. Documented role: cable socket. Current product PDF differs from olderBDA63830Arating. Preserve old source record and contextualize dates.; Not for ACmains or power supply use; not for interrupting current. Acceptance diameter6–12mm is not connector width.	Twist lock; mechanically aligned insert/chuck/housing (NL4FXX-W-S)S918Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NL4FXX-W-S. Documented role: cable socket. Current product PDF differs from olderBDA63830Arating. Preserve old source record and contextualize dates.; Not for ACmains or power supply use; not for interrupting current. Acceptance diameter6–12mm is not connector width.
Keying / polarization	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Documented identification	Neutrik NL2FXX-W-S is a two-contact speakON connector.C127A	Neutrik NL4FXX-W-S is a four-contact speakON connector.C128A
Important distinction	Neutrik excludes AC mains and power-supply use and warns against interrupting current with this connector.C127B	Neutrik excludes use as an AC mains or power-supply connector.C128B
Evidence	C127A,C127B,C127D → Independent review pending	C128A,C128B,C128D → Independent review pending

Read field by field — no sideways scrolling

The same selected records, fields, values and source links as the table. Missing fields remain non-equivalent; no values are merged.

Layer

2-pole speakON loudspeaker connectorP127 / Connector: Connector
4-pole speakON loudspeaker connectorP128 / Connector: Connector

Key distinction

2-pole speakON loudspeaker connectorP127 / Connector: Loudspeaker connection does not mean mains power.
4-pole speakON loudspeaker connectorP128 / Connector: Four poles do not specify an amplifier wiring mode.

Nominal contacts

2-pole speakON loudspeaker connectorP127 / Connector: 2S102Nominal contact count; some implementations may omit populated positions. It is not a wiring map.
4-pole speakON loudspeaker connectorP128 / Connector: 4S103Nominal contact count; some implementations may omit populated positions. It is not a wiring map.

Positions / cavity span

2-pole speakON loudspeaker connectorP127 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
4-pole speakON loudspeaker connectorP128 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Populated contacts

2-pole speakON loudspeaker connectorP127 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
4-pole speakON loudspeaker connectorP128 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Contact rows

2-pole speakON loudspeaker connectorP127 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
4-pole speakON loudspeaker connectorP128 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Contact pitch

2-pole speakON loudspeaker connectorP127 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
4-pole speakON loudspeaker connectorP128 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Dimensions / axis

2-pole speakON loudspeaker connectorP127 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
4-pole speakON loudspeaker connectorP128 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Connector role

2-pole speakON loudspeaker connectorP127 / Connector: cable socket (NL2FXX-W-S)S917Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NL2FXX-W-S. Documented role: cable socket. Current product PDF differs from olderBDA63830Arating. Preserve old source record and contextualize dates.; Not for ACmains or power supply use; not for interrupting current. Acceptance diameter6–12mm is not connector width.
4-pole speakON loudspeaker connectorP128 / Connector: cable socket (NL4FXX-W-S)S918Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NL4FXX-W-S. Documented role: cable socket. Current product PDF differs from olderBDA63830Arating. Preserve old source record and contextualize dates.; Not for ACmains or power supply use; not for interrupting current. Acceptance diameter6–12mm is not connector width.

Coupling / latch

2-pole speakON loudspeaker connectorP127 / Connector: Twist lock; mechanically aligned insert/chuck/housing (NL2FXX-W-S)S917Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NL2FXX-W-S. Documented role: cable socket. Current product PDF differs from olderBDA63830Arating. Preserve old source record and contextualize dates.; Not for ACmains or power supply use; not for interrupting current. Acceptance diameter6–12mm is not connector width.
4-pole speakON loudspeaker connectorP128 / Connector: Twist lock; mechanically aligned insert/chuck/housing (NL4FXX-W-S)S918Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NL4FXX-W-S. Documented role: cable socket. Current product PDF differs from olderBDA63830Arating. Preserve old source record and contextualize dates.; Not for ACmains or power supply use; not for interrupting current. Acceptance diameter6–12mm is not connector width.

Keying / polarization

2-pole speakON loudspeaker connectorP127 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
4-pole speakON loudspeaker connectorP128 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Documented identification

2-pole speakON loudspeaker connectorP127 / Connector: Neutrik NL2FXX-W-S is a two-contact speakON connector.C127A
4-pole speakON loudspeaker connectorP128 / Connector: Neutrik NL4FXX-W-S is a four-contact speakON connector.C128A

Important distinction

2-pole speakON loudspeaker connectorP127 / Connector: Neutrik excludes AC mains and power-supply use and warns against interrupting current with this connector.C127B
4-pole speakON loudspeaker connectorP128 / Connector: Neutrik excludes use as an AC mains or power-supply connector.C128B

Evidence

2-pole speakON loudspeaker connectorP127 / Connector: C127A,C127B,C127D →
Independent review pending
4-pole speakON loudspeaker connectorP128 / Connector: C128A,C128B,C128D →
Independent review pending

Your next step

Use the distinction in context.

Open the field notes Read source-linked facts and limitations.Compare another pair Start from a common confusion.Check a connection A comparison is not a compatibility verdict.

Continue the distinction

Compare next

Browse every comparison →

2-, 4- and 8-pole speakONWhich pole count and equipment wiring does the loudspeaker system document?TOSLINK vs Mini-TOSLINKStandard TOSLINK and Mini-TOSLINK are different optical-audio connector forms. Mini-TOSLINK can resemble a 3.5 mm jack, so confirm optical support from device documentation.3-pin Mini-XLR versus full-size 3-pin XLRAre you looking at the compact Mini-XLR/Tini-QG form or a full-size XLR connector? Matching three-pole counts do not make the shells interchangeable.3-pin versus 4-pin Mini-XLRDoes the compact Mini-XLR/Tini-QG form have three or four conductors? Conductor count does not establish the device wiring or signal role.3.5 mm TRS vs TRRSContact arrangement is a visual clue. Signal assignment still needs device documentation.4-pin versus 5-pin Mini-XLRDoes the compact Mini-XLR/Tini-QG form have four or five conductors? Do not infer a pin assignment from count alone.

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Evidence behind this page

Scope first. Source second. Approval separate.

3 linked sources · 6 scoped claims · 0 sources with inspection/access flags.

Page scope: Evidence behind the compared records; the editorial comparison still needs separate review.

Assessment 2026-10-22 · earliest scheduled source review 2027-01-01. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 3 source scopes, access limits and dates

S102 · NL2FXX-W-S two-pole speakON

Neutrik · Manufacturer / product-owner domain · inspected 2026-10-03 · due 2027-01-01

Within inspection window

Scoped support: Two-contact speakON loudspeaker connector; not for mains or power supply use; not for interrupting current.

Not established / limitations: No current-rating recommendation, wiring instructions or powerCON interchangeability.

Locator: Product; Electrical / contact count; Attention

S103 · NL4FXX-W-S four-pole speakON

Neutrik · Manufacturer / product-owner domain · inspected 2026-10-03 · due 2027-01-01

Within inspection window

Scoped support: Four-contact speakON loudspeaker connector and its no-mains boundary.

Not established / limitations: No bi-amping layout, wire gauge, mating approval for other families or safe live-disconnection claim.

Locator: Product; Electrical / contact count; Attention

S496 · NL2MPXX two-pole chassis connector exclusion

Neutrik · Manufacturer / product-owner domain · inspected 2026-10-11 · due 2027-01-09

Within inspection window

Scoped support: Named two-pole chassis example; not a claim about every speakON receptacle.

Not established / limitations: Named example only. No universal compatibility or publication approval. Raw-byte acquisition status is recorded separately.

Locator: Product description: does not intermate with the 4-pole cable connector.

Trace 6 claims to their source records

C127A · P127

Neutrik NL2FXX-W-S is a two-contact speakON connector.

Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval

Source links: S102 · Evidence trail → (private workspace)

C127B · P127

Neutrik excludes AC mains and power-supply use and warns against interrupting current with this connector.

Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval

Source links: S102 · Evidence trail → (private workspace)

C127D · P127

Neutrik NL2FXX-W-S is documented to mate with two-pole and four-pole chassis connectors, using contacts +1/-1.

Claim scope: Named two-pole cable connector mating statement. This is not four-circuit connectivity or approval of equipment wiring.

Source links: S102 · Evidence trail → (private workspace)

C128A · P128

Neutrik NL4FXX-W-S is a four-contact speakON connector.

Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval

Source links: S103 · Evidence trail → (private workspace)

C128B · P128

Neutrik excludes use as an AC mains or power-supply connector.

Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval

Source links: S103 · Evidence trail → (private workspace)

C128D · P128

Neutrik explicitly excludes a four-pole cable connector from its NL2MPXX two-pole chassis connector.

Claim scope: Named chassis exclusion; the two-to-four cable/chassis relationship is not reciprocal.

Source links: S496 · Evidence trail → (private workspace)

Prepare this page for review →Read the evidence method →

Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.