FIELD REFERENCE / AUDIO
Count the contacts.
Then read the role.
A familiar plug is a starting point, not a signal map. Separate the physical form, the named component and what the equipment actually does.
01 / FORM
Tip. Ring. Sleeve.
Describe the exposed contacts without assigning channels or microphone wiring.
02 / COMPONENT
Plug or switched jack?
Keep the mating contact arrangement separate from PCB and switch connections.
03 / EQUIPMENT
Read the port label.
Use the exact device documentation to establish input, output and signal role.
SOURCE-OBSERVED / THREE EXACT PARTS + ONE NAMED SERIES
The useful side.
Without an invented pinout.
(private workspace)P019 / Source-observed physical study
NTP3RC / right-angle profile
Neutrik NTP3RC
Upper-right side elevation in ST-NTP3RC · Cable plug / cable end
Exact part, qualitative side exterior. The cable exit is not a signal-direction arrow.
Not to scale. Technical and rights review pending.
Inspect view & provenance (private workspace)
(private workspace)P021 / Source-observed physical study
NP2X / two-pole profile
Neutrik NP2X
Side elevation in ST-NP2X · Cable plug / cable end
Exact part, qualitative side view. The nominal quarter-inch label is not copied as an exact measured diameter.
Not to scale. Technical and rights review pending.
Inspect view & provenance (private workspace)
(private workspace)P022 / Source-observed physical study
NP3X / three-pole profile
Neutrik NP3X
Side elevation in ST-NP3X · Cable plug / cable end
Exact part, qualitative side view. Contact designations do not select the equipment port role.
Not to scale. Technical and rights review pending.
Inspect view & provenance (private workspace)
(private workspace)P310 / Source-observed physical study
TA4FS series / mating-face view
Switchcraft TA4FS series; cable-size suffix not selected
Front mating-side view, TA4FS entry, TA_FS revision B · Cable plug / cable end
Named-series front view, not an exact ordered-suffix photograph. The three-contact side assembly elsewhere on the drawing is not substituted.
Not to scale. Technical and rights review pending.
Inspect view & provenance (private workspace)NTP3RC, NP2X and NP3X are exact-part qualitative studies. The TA4FS image is explicitly a series front view; no cable-size suffix is selected. It is not the three-contact side assembly shown elsewhere on the drawing. Canvases are not a common physical scale.
COMPONENT / CONTACT / ROLE / EVIDENCE
Seven examples. Different questions.
Compare TRS and TRRS → · Compare TS and TRS → · Open the existing audio desk →
| Reference example | Role & contact arrangement | What this establishes | What to check next |
|---|---|---|---|
| 3.5 mm TRS plugNeutrik NTP3RCInspect the declared view → (private workspace) | Male cable plug; right-angle cable exit Three conducting sections: tip, ring and sleeve. | Component geometry only; the connected equipment chooses the signal role.Evidence, observation & limitsInspected . C019B NTP3RC miniature phone plug ↗ Neutrik NTP3RC customer drawing ST-NTP3RC ↗ No hardware test, independent technical approval or rights clearance is asserted. | Not established: Left/right, balanced audio, microphone support and adapter fit are not established. Next check: Read the exact port function and cable construction before choosing an adapter. |
| 6.35 mm TS plugNeutrik NP2XInspect the declared view → (private workspace) | Male cable plug; straight cable exit Two conducting sections; panel C names Tip and Shield termination paths. | Nominal quarter-inch family. The named drawing labels a 6.29 mm shaft, not an exact 6.35 mm diameter.Evidence, observation & limitsNeutrik NP2X customer drawing ST-NP2X ↗ Neutrik NP*X assembly instruction BDA 142-0 ↗ No hardware test, independent technical approval or rights clearance is asserted. | Not established: Signal level, instrument/speaker suitability, mating tolerance and terminal wiring are not established. Next check: Distinguish the family name from the exact part drawing; check the equipment input or output role. |
| 6.35 mm TRS plugNeutrik NP3XInspect the declared view → (private workspace) | Male cable plug; straight cable exit Three sections; panel C names Tip, Ring and Shield. | The named drawing labels a 6.29 mm shaft. Three sections do not specify stereo or balanced use.Evidence, observation & limitsNP3X phone plug ↗ Neutrik NP3X customer drawing ST-NP3X ↗ Neutrik NP*X assembly instruction BDA 142-0 ↗ No hardware test, independent technical approval or rights clearance is asserted. | Not established: Channel mapping, balancing, current capability and fit with an unspecified socket remain unknown. Next check: Identify both equipment ports and consult their signal assignments, not only the plug bands. |
| 3.5 mm TRRS jackSwitchcraft 35RASMT8CHNTRX No source-observed physical view is selected for this row. | Horizontal surface-mount PC jack; not a cable plug Four conductors, with tip/ring switching listed separately. | Switch contacts and mating conductors are different counts; no exact physical view is supplied.Evidence, observation & limitsInspected . C020C Switchcraft 35RASMT8CHNTRX switched TRRS jack ↗ No hardware test, independent technical approval or rights clearance is asserted. | Not established: The PCB terminal count, switch timing, CTIA/OMTP mapping and physical footprint are not established here. Next check: Obtain the exact circuit/footprint drawing and equipment wiring before selecting a replacement jack. |
| Four-contact Mini-XLRSwitchcraft TA4FS seriesInspect the declared view → (private workspace) | Female cable connector; front mating-side view Four apertures. No signal labels or solder-side mirror view are supplied. | F means female and S sealed in the ordering key; suffix 11 specifies the stated cable-size range, not a pin assignment.Evidence, observation & limitsInspected . C310C Switchcraft sealed Tini-QG Mini-XLR customer drawing ↗ No hardware test, independent technical approval or rights clearance is asserted. | Not established: A cable-size suffix has not been selected for the illustration; microphone wiring, bodypack support and IP rating are unknown. Next check: Match the complete ordered part and both equipment manuals. Do not transfer a pinout from another four-contact connector. |
| Headphone-path warningScarlett Solo 4th Gen / front headphone output No source-observed physical view is selected for this row. | Documented headphone output; not a balanced line-output jack The manual calls for TRS headphones/adapters and warns about TS or TRRS examples. | This is a named-device warning, not a universal ban on TRRS headphones.Evidence, observation & limitsInspected . C020D Scarlett Solo 4th Gen: headphone and line-output roles ↗ No hardware test, independent technical approval or rights clearance is asserted. | Not established: The guide does not approve an arbitrary adapter, a microphone path or an unknown headphone model. Next check: Use the exact fourth-generation Solo headphone documentation and confirm the adapter is TRS at the required interfaces. |
| TRS port-role contrastScarlett Solo 4th Gen / headphones and outputs 1–2Inspect the declared view → (private workspace) | Separate headphone and balanced line-output roles TRS is used in both roles; visible contact count does not select the destination. | Outputs 1 and 2 are line-level connections for an amplifier or active monitors.Evidence, observation & limitsInspected . C022E Scarlett Solo 4th Gen: headphone and line-output roles ↗ No hardware test, independent technical approval or rights clearance is asserted. | Not established: No headphone/line-output interchangeability, passive-speaker drive capability or unknown monitor pairing is approved. Next check: Read the port label, equipment model and destination requirements before choosing the cable. |
P019 / SOURCE-SCOPED EXAMPLE
3.5 mm TRS plug
Neutrik NTP3RC
- Component / port role
- Male cable plug; right-angle cable exit
- Contact arrangement
- Three conducting sections: tip, ring and sleeve.
- What is established
- Component geometry only; the connected equipment chooses the signal role.
- Not established
- Left/right, balanced audio, microphone support and adapter fit are not established.
- Next check
- Read the exact port function and cable construction before choosing an adapter.
Evidence, observation & limits
Inspected . C019B
NTP3RC miniature phone plug ↗
Product identification
Canonical source record S022 dated 2026-10-01. The V129 visit is recorded separately; inherited source dates are unchanged.
Neutrik NTP3RC customer drawing ST-NTP3RC ↗
Sheet 1 of 1; upper-right side elevation. Revision A, changed 30-Jul-2012.
Canonical source record S523 dated 2026-10-11. The V129 visit is recorded separately; inherited source dates are unchanged.
No hardware test, independent technical approval or rights clearance is asserted.
P021 / SOURCE-SCOPED EXAMPLE
6.35 mm TS plug
Neutrik NP2X
- Component / port role
- Male cable plug; straight cable exit
- Contact arrangement
- Two conducting sections; panel C names Tip and Shield termination paths.
- What is established
- Nominal quarter-inch family. The named drawing labels a 6.29 mm shaft, not an exact 6.35 mm diameter.
- Not established
- Signal level, instrument/speaker suitability, mating tolerance and terminal wiring are not established.
- Next check
- Distinguish the family name from the exact part drawing; check the equipment input or output role.
Evidence, observation & limits
Neutrik NP2X customer drawing ST-NP2X ↗
Sheet 1 of 1; main elevation, diameter callout and title block dated 04-Nov-2003.
Canonical source record S524 dated 2026-10-11. The V129 visit is recorded separately; inherited source dates are unchanged.
Neutrik NP*X assembly instruction BDA 142-0 ↗
Single page; panel C terminal labels for NP2X and NP3X. Footer update 06-Nov-2010.
Canonical source record S526 dated 2026-10-11. The V129 visit is recorded separately; inherited source dates are unchanged.
No hardware test, independent technical approval or rights clearance is asserted.
P022 / SOURCE-SCOPED EXAMPLE
6.35 mm TRS plug
Neutrik NP3X
- Component / port role
- Male cable plug; straight cable exit
- Contact arrangement
- Three sections; panel C names Tip, Ring and Shield.
- What is established
- The named drawing labels a 6.29 mm shaft. Three sections do not specify stereo or balanced use.
- Not established
- Channel mapping, balancing, current capability and fit with an unspecified socket remain unknown.
- Next check
- Identify both equipment ports and consult their signal assignments, not only the plug bands.
Evidence, observation & limits
NP3X phone plug ↗
Technical information
Canonical source record S025 dated 2026-10-01. The V129 visit is recorded separately; inherited source dates are unchanged.
Neutrik NP3X customer drawing ST-NP3X ↗
Sheet 1 of 1; main elevation, diameter callout and title block dated 26-Jan-2004.
Canonical source record S525 dated 2026-10-11. The V129 visit is recorded separately; inherited source dates are unchanged.
Neutrik NP*X assembly instruction BDA 142-0 ↗
Single page; panel C terminal labels for NP2X and NP3X. Footer update 06-Nov-2010.
Canonical source record S526 dated 2026-10-11. The V129 visit is recorded separately; inherited source dates are unchanged.
No hardware test, independent technical approval or rights clearance is asserted.
P020 / SOURCE-SCOPED EXAMPLE
3.5 mm TRRS jack
Switchcraft 35RASMT8CHNTRX
- Component / port role
- Horizontal surface-mount PC jack; not a cable plug
- Contact arrangement
- Four conductors, with tip/ring switching listed separately.
- What is established
- Switch contacts and mating conductors are different counts; no exact physical view is supplied.
- Not established
- The PCB terminal count, switch timing, CTIA/OMTP mapping and physical footprint are not established here.
- Next check
- Obtain the exact circuit/footprint drawing and equipment wiring before selecting a replacement jack.
No source-observed physical view is selected for this row.
Evidence, observation & limits
Inspected . C020C
Switchcraft 35RASMT8CHNTRX switched TRRS jack ↗
Configuration: four conductors, horizontal PC/surface mount, jack; Electrical: TRRS (Tip/Ring Switch).
Canonical source record S527 dated 2026-10-11. The V129 visit is recorded separately; inherited source dates are unchanged.
No hardware test, independent technical approval or rights clearance is asserted.
P310 / SOURCE-SCOPED EXAMPLE
Four-contact Mini-XLR
Switchcraft TA4FS series
- Component / port role
- Female cable connector; front mating-side view
- Contact arrangement
- Four apertures. No signal labels or solder-side mirror view are supplied.
- What is established
- F means female and S sealed in the ordering key; suffix 11 specifies the stated cable-size range, not a pin assignment.
- Not established
- A cable-size suffix has not been selected for the illustration; microphone wiring, bodypack support and IP rating are unknown.
- Next check
- Match the complete ordered part and both equipment manuals. Do not transfer a pinout from another four-contact connector.
Evidence, observation & limits
Inspected . C310C
Switchcraft sealed Tini-QG Mini-XLR customer drawing ↗
Front mating-side views for TA3FS, TA4FS and TA5FS with numbered contacts
Canonical source record S359 dated 2026-10-06. The V129 visit is recorded separately; inherited source dates are unchanged.
No hardware test, independent technical approval or rights clearance is asserted.
P020 / SOURCE-SCOPED EXAMPLE
Headphone-path warning
Scarlett Solo 4th Gen / front headphone output
- Component / port role
- Documented headphone output; not a balanced line-output jack
- Contact arrangement
- The manual calls for TRS headphones/adapters and warns about TS or TRRS examples.
- What is established
- This is a named-device warning, not a universal ban on TRRS headphones.
- Not established
- The guide does not approve an arbitrary adapter, a microphone path or an unknown headphone model.
- Next check
- Use the exact fourth-generation Solo headphone documentation and confirm the adapter is TRS at the required interfaces.
No source-observed physical view is selected for this row.
Evidence, observation & limits
Inspected . C020D
Scarlett Solo 4th Gen: headphone and line-output roles ↗
Headphone Output and Speaker Outputs sections; page update 16-Jul-2026.
Canonical source record S528 dated 2026-10-11. The V129 visit is recorded separately; inherited source dates are unchanged.
No hardware test, independent technical approval or rights clearance is asserted.
P022 / SOURCE-SCOPED EXAMPLE
TRS port-role contrast
Scarlett Solo 4th Gen / headphones and outputs 1–2
- Component / port role
- Separate headphone and balanced line-output roles
- Contact arrangement
- TRS is used in both roles; visible contact count does not select the destination.
- What is established
- Outputs 1 and 2 are line-level connections for an amplifier or active monitors.
- Not established
- No headphone/line-output interchangeability, passive-speaker drive capability or unknown monitor pairing is approved.
- Next check
- Read the port label, equipment model and destination requirements before choosing the cable.
Evidence, observation & limits
Inspected . C022E
Scarlett Solo 4th Gen: headphone and line-output roles ↗
Headphone Output and Speaker Outputs sections; page update 16-Jul-2026.
Canonical source record S528 dated 2026-10-11. The V129 visit is recorded separately; inherited source dates are unchanged.
No hardware test, independent technical approval or rights clearance is asserted.
NAMED DEVICE / NOT A UNIVERSAL RULE
Same TRS form.
A different destination.
The headphone warning and line-output descriptions above apply to that named interface. They do not assign every TRS socket a stereo or balanced function, and they do not authorize a headphone-to-speaker substitution.
FIELD OUTPUT / FOUR PAGES / SAME EVIDENCE LIMITS
Keep the distinction at hand.
Physical studies, component-role notes, the named-device contrast and a dated source ledger. No wiring recipe or fit table.
Letter PDF · 4 pages ↓ (legacy download held for current evidence review). Current focused printable referencesA4 PDF · 4 pages ↓ (legacy download held for current evidence review). Current focused printable referencesNew evidence, bounded conclusions.
Nine canonical claims and six source records deepen five existing forms. One source record revisits an already catalogued URL under a new audio-role scope; only five new distinct source URLs are added. Ten primary-source observations are logged, including five inspected PDF pages. No raw manufacturer PDFs are redistributed.
Three previously inherited-only phone-plug forms now have source-observed studies. Mini-XLR four-contact gains its first registered specimen. The switched TRRS jack still has no new physical view. All new artwork awaits independent technical and rights review.