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/Podcast — Local Recording + SNK-2 Tie to Control
Signal Chain
Local capture + SNK-2 16×4 stagebox → Control (SN-02)
Primary Capture
Sony FX30 with 2x XLR/TRS inputs
Portable Recorder
Zoom F6 or MixPre-6 on set
Spine Crossing
Sleeved SN-03 penetration kit — offset, sealed both faces
| Connection | Type | Qty | Direction |
|---|---|---|---|
| Camera audio inputs | XLR / TRS | 2 | On set only |
| Portable recorder capture | XLR / line | 6 max | On set only |
| SNK-2 stagebox (wall-mount 16×4, Whirlwind Medusa / Radial class) | 16ch multicore (~15m) | 16 send / 4 return | Video/Podcast → Control 48-pt patchbay (SN-02/SN-04) |
| Media handoff | SSD / SD card | 1 | Video/Podcast → post workflow |
| Room booking | Operational note | — | Can still record fully locally without Control |
S3 BOQ Issue 1: The Video/Podcast room keeps its local camera/recorder workflow AND gains a fixed audio tie: the SNK-2 wall-mount 16×4 stagebox with a 16ch multicore to the Control patchbay (BOQ SN-02) — band / large-session sources record in the video room and are mixed in Control.
[AC] The multicore crosses the buffer spine ONLY through the SN-03 penetration kit: under-floor EMT with stub-ups cast with the rafts, oversized steel sleeves OFFSET through BOTH spine leaves, RWA45 packing, acoustic sealant on both faces of both leaves, putty pads on every box. A badly sealed sleeve voids the STC 55 spine.
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 the buffer-spine door head (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 |
|---|---|---|
| Video/Podcast 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/Podcast 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-03 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.