FIELD GUIDESource-led reference

P150 / Audio connections / Guide

Phantom power: requirement, supply and switch state

Document signal role, channel layout and power separately from connector shape.

The useful distinction

Read the exact model and physical port label, then the manufacturer description of its role.

Claim inspection dates: 2026-10-03 · Independent review pending

Guide note · not an individual product specification

The useful distinction

Understand the requirement.

Keep microphone demand, receiver supply documentation and your observed switch state separate. [C150A]

Scarlett 2i2 4th Gen phantom power is shared across both XLR microphone inputs and is not sent to the front jack inputs. [C150B]

Bounded facts, visible unknowns

Specifications and limits

Phantom power: requirement, supply and switch state facts and limitations
Workflow boundaryScoped analog audio documentation; not wiring or compatibility approval. [C150A] [C150B]
Verified device listNot included. Check exact device and accessory documentation.
A boundary, not an omission to guess around.

A documented supply voltage can be compared with a documented microphone range. This is only a range check. Cable wiring, current capacity, regulation and all connected devices remain separate checks. An absent requirement in an inspected section is unknown, not zero.

Before you connect

What to check

  1. Identify the exact device and port.
  2. Keep shared channels and controls explicit.
  3. Retain unknown power, mode and cable observations.
Trace a supported connection class →

Shared power needs a shared review

Rows assigned to the same physical interface unit must not give contradictory observations for one shared phantom control. Every connected XLR path matters. Never assume that a dynamic label alone certifies tolerance of phantom power.

Consult instructions before changing the setup

Use the exact manufacturer setup procedure and stop when equipment, cables or power requirements are uncertain. The application neither recommends hot-patching nor authorizes power for a connected device.

Your next step

Move from the form to the requirement.

The source trail

Evidence for this page

AI-assisted inspection is not independent engineering review. Source scope and access limitations are disclosed below. Procedural checklists are editorial requirements, not hardware measurements.

C150ASource checked · pending review

AT2035 documentation specifies an 11–52 V DC phantom range.

Audio-Technica · AT2035 specification sheet ↗

Locator: Page 1: output description and phantom specification
Access: public pdf text. Historical manufacturer sheet, not a new publication. A voltage-range comparison does not establish sufficient current, regulation or cable continuity.

S140: full source recordInspect review dependencies → (private workspace)

Claim scope: Exact-model analog audio reference; no end-to-end compatibility or electrical approval.. Next review due 2027-01-01.

C150BSource checked · pending review

Scarlett 2i2 4th Gen phantom power is shared across both XLR microphone inputs and is not sent to the front jack inputs.

Focusrite · 2i2 4th Gen hardware features ↗

Locator: Front/rear panels, line/instrument and phantom power sections
Access: public page. This is not permission to enable phantom power on unknown connected equipment.

S137: full source recordInspect review dependencies → (private workspace)

Claim scope: Exact-model analog audio reference; no end-to-end compatibility or electrical approval.. Next review due 2027-01-01.

Suggest a correction to this field note →

Audio connection desk

Follow the signal beyond the plug

Signal roles, channel layouts and power requirements are distinct from connector shape. No hardware approval is implied.

Evidence behind this page

Scope first. Source second. Approval separate.

2 linked sources · 2 scoped claims · 0 sources with inspection/access flags.

Page scope: consumer_reference_expansion

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 2 source scopes, access limits and dates

S137 · 2i2 4th Gen hardware features

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

Within inspection window

Scoped support: Scarlett 2i2 4th Gen exact physical channel and phantom scope.

Not established / limitations: This is not permission to enable phantom power on unknown connected equipment.

Locator: Front/rear panels, line/instrument and phantom power sections

S140 · AT2035 specification sheet

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

Within inspection window

Scoped support: AT2035 XLR condenser microphone.

Not established / limitations: Historical manufacturer sheet, not a new publication. A voltage-range comparison does not establish sufficient current, regulation or cable continuity.

Locator: Page 1: output description and phantom specification

Trace 2 claims to their source records

C150A · P150

AT2035 documentation specifies an 11–52 V DC phantom range.

Claim scope: Exact-model analog audio reference; no end-to-end compatibility or electrical approval.

Source links: S140 · Evidence trail → (private workspace)

C150B · P150

Scarlett 2i2 4th Gen phantom power is shared across both XLR microphone inputs and is not sent to the front jack inputs.

Claim scope: Exact-model analog audio reference; no end-to-end compatibility or electrical approval.

Source links: S137 · 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.