FIELD GUIDESource-led reference
Port & Cable

E026 · Source-scoped pinout variants

3-pin XLR connector engineering reference

Neutrik-documented three-pole XLR audio wiring convention.

Open field noteSource trail

Source checked · no independent review claimed · Fabrication approved: no

3-pole XLR audio pin-role reference original orientation schematic
Original pinout diagram; read the exact variant and view below. Not to scale.

Orientation

How to read this profile

Tabular pin-number reference only in V35; no face geometry is drawn, avoiding an unsourced male/female mirror assumption.

Source-scoped identification facts

Each value retains its exact example, role and measurement axis. Facts from different parts must not be combined into an invented component.

Documented examples; not a mating drawing or compatibility approval
Nominal contacts3S028 · S192three-pole XLR audio wiring convention; nominal engineering count, not automatically positions, population or a device wiring map. three-pole XLR audio wiring convention
Connector roleplug (Neutrik NC3MXX)S028Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Exact XLR component identity; not a device signal, microphone-bias or electrical compatibility assignment.
Contact gender / arrangementmale (Neutrik NC3MXX)S028Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Exact XLR component identity; not a device signal, microphone-bias or electrical compatibility assignment.
Mountingcable (Claim C026C); solder contacts (NC3MXX)S028 · S870Separate exact examples; retain each value’s source, role, axis and part scope. Exact XLR component identity; not a device signal, microphone-bias or electrical compatibility assignment. Exact named example NC3MXX: Three-pole male XLR cable connector. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. Cable acceptance diameter is not XLR mating-shell diameter.
Coupling / latchlatch (Claim C026A); latch (Claim C026C); latch (Neutrik NC3MXX); latch lock (NC3MXX)S028 · S028 · S870Separate exact examples; retain each value’s source, role, axis and part scope. Consumer identification / documented standard or product class only Exact XLR component identity; not a device signal, microphone-bias or electrical compatibility assignment. Exact named example NC3MXX: Three-pole male XLR cable connector. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. Cable acceptance diameter is not XLR mating-shell diameter.
Shell / formnickel housing (Neutrik NC3MXX)S028Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Exact XLR component identity; not a device signal, microphone-bias or electrical compatibility assignment.
ManufacturerNeutrik (NC3MXX)S028Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Exact XLR component identity; not a device signal, microphone-bias or electrical compatibility assignment.
SeriesXLR XX (NC3MXX)S028Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Exact XLR component identity; not a device signal, microphone-bias or electrical compatibility assignment.
Exact part / implementationNC3MXX (NC3MXX)S028Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Exact XLR component identity; not a device signal, microphone-bias or electrical compatibility assignment.

Not recorded: Positions / cavity span, Populated contacts, Contact rows, Contact pitch, Dimensions / axis, Keying / polarization, Recorded markings, View convention. Unknown fields stay unknown; illustrations supply no measurements or pin assignments.

Recorded variant and source limits
  • No generic XLR mechanical dimensions or pin-face geometry are published in V35.
  • A device may use an XLR shell for a documented function outside this audio convention; exact equipment documentation still controls.
  • Focusrite ISA Two microphone input: Female receptacle mating-face convention; use contact numbers. ISA-specific left/right position is unverified.
  • Yamaha M-5000 BAL input — PHASE NORMAL: Female receptacle face, lever up; 2 upper left, 1 upper right, 3 below.
  • Yamaha M-5000 BAL input — PHASE INVERTED: Female receptacle face, lever up; 2 upper left, 1 upper right, 3 below.
Report a correction to these facts →

Pins & wiring

Pinout

Choose the exact wiring. Pin numbers follow its stated view; a schematic does not establish physical positions. Check your exact device before wiring.

What the status labels mean
Confirmed
Recorded research passes agree within this variant; this is not independent human review or hardware validation.
Single source
Only one underlying document, or one pass, supports this assignment.
Device-specific
Supported for the named equipment or wiring only. Check your device’s manual.
Unverified
Missing or conflicting evidence. Do not wire from this row.
Not connected
The source explicitly says NC, no contact or no pin for this wiring.
Wiring variant

Focusrite ISA Two microphone input

Device-specific wiring. Check your device’s manual before connecting or applying power.

View and evidence limits

Female receptacle mating-face convention; use contact numbers. ISA-specific left/right position is unverified.

  • P026 3-pin XLR — Agree (1 ground/screen, 2 hot +, 3 cold −) — AES/IEC standard text paywalled; confirmed from Yamaha, Focusrite, Shure documents. Physical position of pin 1 on the mating face not confirmed from a dimensioned drawing.
  • AES3, lighting/control, DC power, proprietary XLR3 wiring and historical fixed pin-3-hot devices were not established from primary documents in this pass.
  • The retrieved V2 p. 9 labels an XLR-3 male Output but supplies no separate numbered output table or XLR face drawing. Its output pin functions and ISA-specific spatial layout are unverified here.
3-pole XLR audio pin-role referenceFemale receptacle mating-face convention; use contact numbers. ISA-specific left/right position is unverified.SCHEMATIC · physical positions unconfirmedNot to scale · check the named wiring and device manual1: Screen (device_specific)12: Hot (+ve) (device_specific)23: Cold (-ve) (device_specific)3powergrounddataConfigshieldNCUnknown
Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.
Focusrite ISA Two microphone input — source-scoped contact map
PinSignalWhat it doesStatus
1ScreenCable screen or shield connection; check the named equipment.Device-specific
Sources
2Hot (+ve)Control, detection or configuration connection; check the source and device.Device-specific
Sources
3Cold (-ve)Control, detection or configuration connection; check the source and device.Device-specific
Sources
Sources (1)

Yamaha M-5000 BAL input — PHASE NORMAL

Device-specific wiring. Check your device’s manual before connecting or applying power.

View and evidence limits

Female receptacle face, lever up; 2 upper left, 1 upper right, 3 below.

  • P026 3-pin XLR — Agree (1 ground/screen, 2 hot +, 3 cold −) — AES/IEC standard text paywalled; confirmed from Yamaha, Focusrite, Shure documents. Physical position of pin 1 on the mating face not confirmed from a dimensioned drawing.
  • AES3, lighting/control, DC power, proprietary XLR3 wiring and historical fixed pin-3-hot devices were not established from primary documents in this pass.
  • The retrieved V2 p. 9 labels an XLR-3 male Output but supplies no separate numbered output table or XLR face drawing. Its output pin functions and ISA-specific spatial layout are unverified here.
3-pole XLR audio pin-role referenceFemale receptacle face, lever up; 2 upper left, 1 upper right, 3 below.SCHEMATIC · physical positions unconfirmedNot to scale · check the named wiring and device manual1: Ground (earth) (device_specific)12: Hot (device_specific)23: Cold (device_specific)3powergrounddataConfigshieldNCUnknown
Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.
Yamaha M-5000 BAL input — PHASE NORMAL — source-scoped contact map
PinSignalWhat it doesStatus
1Ground (earth)Ground reference and return.Device-specific
Sources
2HotControl, detection or configuration connection; check the source and device.Device-specific
Sources
3ColdControl, detection or configuration connection; check the source and device.Device-specific
Sources
Sources (1)

Yamaha M-5000 BAL input — PHASE INVERTED

Device-specific wiring. Check your device’s manual before connecting or applying power.

View and evidence limits

Female receptacle face, lever up; 2 upper left, 1 upper right, 3 below.

  • P026 3-pin XLR — Agree (1 ground/screen, 2 hot +, 3 cold −) — AES/IEC standard text paywalled; confirmed from Yamaha, Focusrite, Shure documents. Physical position of pin 1 on the mating face not confirmed from a dimensioned drawing.
  • AES3, lighting/control, DC power, proprietary XLR3 wiring and historical fixed pin-3-hot devices were not established from primary documents in this pass.
  • The retrieved V2 p. 9 labels an XLR-3 male Output but supplies no separate numbered output table or XLR face drawing. Its output pin functions and ISA-specific spatial layout are unverified here.
3-pole XLR audio pin-role referenceFemale receptacle face, lever up; 2 upper left, 1 upper right, 3 below.SCHEMATIC · physical positions unconfirmedNot to scale · check the named wiring and device manual1: Ground (earth) (device_specific)12: Cold (device_specific)23: Hot (device_specific)3powergrounddataConfigshieldNCUnknown
Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.
Yamaha M-5000 BAL input — PHASE INVERTED — source-scoped contact map
PinSignalWhat it doesStatus
1Ground (earth)Ground reference and return.Device-specific
Sources
2ColdControl, detection or configuration connection; check the source and device.Device-specific
Sources
3HotControl, detection or configuration connection; check the source and device.Device-specific
Sources
Sources (1)

Unknowns stay unknown.

  • No generic XLR mechanical dimensions or pin-face geometry are published in V35.
  • A device may use an XLR shell for a documented function outside this audio convention; exact equipment documentation still controls.

Your next step

Use the detail without guessing past its limits.

Read the connector field note Recognition clues and practical checks.Work through a connection Keep exact equipment and cable requirements separate.

Source trail

Claims and sources

C026Bsource checked

For the documented three-pole XLR audio convention, pin 1 is shield/ground, pin 2 is live/hot/positive, and pin 3 is return/cold/negative.

Neutrik · XLR FAQ — 3 pole wiring ↗
How do I wire my cable onto my 3 pole XLR? · Functional wiring convention only; V35 does not publish connector mechanical dimensions or infer every device’s circuitry.

C802Tsource checked

Focusrite ISA Two microphone input: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Focusrite · ISA Two User Guide ↗
p. 9, Appendices > Connector Pinouts > Mic Input, Pin/Signal table · Source scope and unresolved evidence are preserved in the engineering variant.

C802Usource checked

Yamaha M-5000 BAL input — PHASE NORMAL: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Yamaha · M-5000 Power Amplifier Owner's Manual ↗
pp. 8 and 10, PHASE selector and Balanced connection diagrams · Source scope and unresolved evidence are preserved in the engineering variant.

C802Vsource checked

Yamaha M-5000 BAL input — PHASE INVERTED: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Yamaha · M-5000 Power Amplifier Owner's Manual ↗
pp. 8 and 10, PHASE selector and Balanced connection diagrams · Source scope and unresolved evidence are preserved in the engineering variant.

4 source records support this profile. No independent engineering review or hardware validation is claimed.

Discovery Quality III

Questions this record helps answer

All focused explainers →
Mini-XLR pin numbering vs device wiringDoes knowing the Mini-XLR pin number tell me what that pin carries on my microphone, beltpack, headset or other device?

Evidence behind this page

Scope first. Source second. Approval separate.

4 linked sources · 5 scoped claims · 0 sources with inspection/access flags.

Page scope: No V35 face drawing; the source-backed pin-role table avoids an unsourced orientation mirror.

Assessment 2026-10-22 · earliest scheduled source review 2026-12-30. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 4 source scopes, access limits and dates

S028 · NC3MXX XLR cable connector

Neutrik · Manufacturer / product-owner domain · inspected 2026-10-01 · due 2026-12-30

Within inspection window

Scoped support: 3-pole male XLR physical example; no universal signal or power promise.

Not established / limitations:

Locator: Product identification

S192 · XLR FAQ — 3 pole wiring

Neutrik · Manufacturer / product-owner domain · inspected 2026-10-05 · due 2027-01-03

Within inspection window

Scoped support: Three-pole XLR audio contact roles: pin 1 shield/ground, pin 2 live/hot/positive, pin 3 return/cold/negative.

Not established / limitations: Functional wiring convention only; V35 does not publish connector mechanical dimensions or infer every device’s circuitry.

Locator: How do I wire my cable onto my 3 pole XLR?

S707 · ISA Two User Guide

Focusrite · Manufacturer / product-owner domain · inspected 2026-10-18 · due 2027-01-16

Within inspection window

Scoped support: Exact named pinout variant only; not capability or compatibility approval.

Not established / limitations: Source scope and unresolved evidence are preserved in the engineering variant.

Locator: p. 9, Appendices > Connector Pinouts > Mic Input, Pin/Signal table

S708 · M-5000 Power Amplifier Owner's Manual

Yamaha · Manufacturer / product-owner domain · inspected 2026-10-18 · due 2027-01-16

Within inspection window

Scoped support: Exact named pinout variant only; not capability or compatibility approval.

Not established / limitations: Source scope and unresolved evidence are preserved in the engineering variant.

Locator: pp. 8 and 10, PHASE selector and Balanced connection diagrams

Trace 5 claims to their source records

C026A · P026

Three-pole XLR connectors are a distinct keyed, latching circular family.

Claim scope: Consumer identification / documented standard or product class only

Source links: S028 · Evidence trail → (private workspace)

C026B · P026

For the documented three-pole XLR audio convention, pin 1 is shield/ground, pin 2 is live/hot/positive, and pin 3 is return/cold/negative.

Claim scope: Three-pole XLR audio wiring convention only; not universal device-circuitry or mechanical-dimension approval

Source links: S192 · Evidence trail → (private workspace)

C802T · P026

Focusrite ISA Two microphone input: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Claim scope: Pinout variant only; see comparison and per-contact status. Not fabrication approval.

Source links: S707 · Evidence trail → (private workspace)

C802U · P026

Yamaha M-5000 BAL input — PHASE NORMAL: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Claim scope: Pinout variant only; see comparison and per-contact status. Not fabrication approval.

Source links: S708 · Evidence trail → (private workspace)

C802V · P026

Yamaha M-5000 BAL input — PHASE INVERTED: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Claim scope: Pinout variant only; see comparison and per-contact status. Not fabrication approval.

Source links: S708 · Evidence trail → (private workspace)

Prepare this page for review → (private workspace)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.