7.2 Intercom¶
4-place intercom system for driver and passenger communication with radio and audio integration.
Type: 4-Place Intercom
Model: STX
Manufacturer: Rugged Radios
Product Page: Rugged Radio STX
Manual: Quick Start Guide
Mounting: Behind dash
Power Source: PMU OUT20 (5A capacity, CONSTANT)
Specifications¶
| Spec | Value |
|---|---|
| Headset Ports | 4 (expandable to 8 via EXT port) |
| Input Voltage | 9-16V DC |
| Current Draw | <2A typical |
| Dimensions | 5.5" × 3.5" × 1.5" |
Features¶
- VOX or PTT mode per headset
- Individual volume controls per headset
- RADIO port for G1 GMRS integration
- AUX port for Fusion head unit audio
- EXT port for expansion modules
- Music auto-mute when radio transmits
Ports¶
| Port | Function | Connection |
|---|---|---|
| RADIO | Two-way radio integration | G1 GMRS via integration cable |
| AUX | External audio input | Fusion MS-RA670 (3.5mm or RCA) |
| EXT | Expansion modules | Optional 4-place expansion |
| Headset 1-4 | Headset connections | Push-to-connect jacks |
Headset Configuration¶
| Port | Position | Jack Location | Cable Length |
|---|---|---|---|
| Port 1 | Driver | STX unit (behind dash) | 6 ft (included) |
| Port 2 | Front passenger | STX unit (behind dash) | 6 ft (included) |
| Port 3 | Rear left | Driver wheel well | Extended |
| Port 4 | Rear right | Passenger wheel well | Extended |
Wiring¶
| Connection | Wire | Source | Notes |
|---|---|---|---|
| Power (+) | 14 AWG | PMU OUT20 | Via firewall grommet |
| Ground (−) | 14 AWG | START battery neg | Direct for audio quality |
| G1 Radio | Integration cable | G1 RADIO port | Audio/PTT/mute |
| Aux Audio | 3.5mm or RCA | Fusion MS-RA670 | Music to headsets |
Installation Notes¶
- Direct battery ground recommended for best audio quality
- PMU output has integrated 5A protection - no inline fuse needed
Outstanding Items¶
None - all specifications determined.