Studio Signal Infrastructure

System Overview

Stagebox SB-01 — Control ↔ VO Live

Physical

18-connector panel

Location

VO Live north wall, 90cm AFF — panel faces into room

Cable

Mogami W2534 quad-core XLR

Conduit

32mm steel through Wall 6

Connection	Type	Qty	Direction
Mic/Line send	XLR	4	VO → Control
Line return	XLR	4	Control → VO
Data/Dante	Cat6A	2	Bidirectional
Headphone send	TRS	1	Control → VO
Talkback return	XLR	1	Control → VO

[AC] Conduit sealed both faces with Rockwool + Tremco sealant.

Control Room end: Cables terminate under engineer desk via floor-level entry. No wall panel on Control Room side — eliminates cable runs between OW-1 observation window and desk. Loose connector bundle managed with Velcro ties under desk shelf.

Video Studio — Independent Operation

Signal Chain

Independent — no stagebox

Primary Capture

Sony FX30 with 2x XLR/TRS inputs

Portable Recorder

Zoom F6 or MixPre-6 on set

Acoustic Benefit

No W5 / W6 conduit penetrations

Connection	Type	Qty	Direction
Camera audio inputs	XLR / TRS	2	On set only
Portable recorder capture	XLR / line	6 max	On set only
Media handoff	SSD / SD card	1	Studio → post workflow
Room booking	Operational note	—	Independent from Control Room

SSOT v3.7 decision: No fixed stagebox and no fixed signal run to Control Room. Video Studio can record completely independently using camera inputs or a portable field recorder.

[AC] Acoustic benefit: W5 and W6 wall integrity is fully preserved because no signal conduit penetrations are required for Studio operation.

Editing Suite — No Stagebox Required

The Editing Suite (B312-2) is a self-contained post-production room. All work uses pre-recorded material from the DAW and NAS storage. No live microphone inputs, no performer monitoring, and no real-time signal routing to Control Room.

A stagebox would be unused wall hardware. Decision: no stagebox in Editing Suite. If future live recording needs arise, a direct XLR wall panel can be added without structural changes.

Talkback System

Component	Detail
Source	Gooseneck desk mic at engineer position (Control Room)
Controller	Mackie Big Knob Studio+ talkback output → VO Live HP4 input
TALLY-01	Red LED indicator, above D2 on buffer spine (VO Live side), 52cm from spine
Control	Single desk switch in Control Room controls VO Live cue / tally only
Signal cable	Low-voltage 2-core, separate conduit from audio and power

Headphone Cue Mix System

Room	Headphones	Amp	Source
Control Room	Beyerdynamic DT 900 Pro X (open-back) + DT 770 Pro 80Ω (closed)	Apollo x4 HP output	Direct from DAW
VO Live	3× Beyerdynamic DT 770 Pro 80Ω	PreSonus HP4 (4-channel)	Apollo x4 HP output via SB-01

Individual volume per performer via HP4 front panel controls.

Audio Interface & Patchbay

Apollo x4

Connection

Thunderbolt 3

Preamps

4 inputs

DSP

1176, LA-2A, Pultec, Neve 1073

WA-73-EQ

Type

Neve-style preamp

Use

SM7B-type mics → Apollo line input

Patchbay

Type

Neutrik 48-pt TRS

Config

Half-normal

Location

Control Room rack

Video Monitoring Chain

Path	Signal	Cable
Studio camera → on-set monitor / recorder	SDI or HDMI	Short local cable only
Portable recorder → removable media handoff	Local record	SSD / SD card
HDMI splitter 1→4	HDMI	Engineer monitor + 2× VO Live actor monitors
Control → VO Live displays	HDMI-over-Cat6A	Extender kits (60m range)

Dante Upgrade Path (Phase 2)

Current (Phase 1): Works without Dante — analog routing via patchbay. All signal paths are copper.

Upgrade path: Dante upgrade requires Apollo x16D (Dante-native) or a standalone Dante bridge device. The Apollo x4 does not have a Dante card slot. Cat6A infrastructure is already in place for either path.

No additional cabling required for the essential studio pair — the Cat6A run through SB-01 remains Dante-ready. Video Studio can add a local network switch later without any fixed tie to Control Room.

Cable Management Rules

Rule	Specification
Audio/power separation in conduit	300mm minimum
Audio/power separation at rack	600mm minimum
Crossings	90° only where unavoidable
Labeling	All cables labeled at both ends
Audio cable spec	Mogami W2534 for balanced XLR runs
Video cable spec	Belden 1694A for SDI
Data cable spec	Cat6A S/FTP, TIA-568B termination

Technical Grounding Strategy [AC]

Star grounding topology prevents ground loops between rooms. All AV equipment chassis ground returns via a single dedicated IG conductor to the star ground bus at the sub-panel.

Parameter	Specification
System	TN-S star topology — separate neutral and protective earth
Technical ground	Isolated Ground (IG) conductors on all AV circuits
Star ground point	Single dedicated bus bar at sub-panel
AV circuits	AV-01 through AV-04 use IG receptacles (orange)
Ground loop prevention	All AV equipment chassis ground via star point only
Conduit	25mm EMT — does NOT carry IG conductor (separate insulated green/yellow)
Receptacles	Orange isolated-ground (IG) Schuko 16A at all AV positions

Critical [AC]: No ground loops between rooms. Chassis ground for all AV equipment returns via dedicated IG conductor to star ground bus. Do not bond equipment chassis to conduit or building steel — use IG conductor only.