


 INSTALLATION STEP 2
WIRING
POWER AND GROUND
To ensure maximum output from your REFERENCE404s amplifier, use high quality, 
  | up to 10’  | up to 20’  | 
  | 
  | 
  | 
REFERENCE404s  | Soundstream Power40 or  | Soundstream Power40  | 
  | Power80  | (4 ga.)  | 
  | (4 or 8 ga.)  | 
  | 
  | 
  | 
  | 
CIRCUIT BREAKERS/FUSES
EXTERNAL
Like all audio components, the REFERENCE404s amplifier must be fused near the battery. A fuse or circuit breaker must be located within 18” of the battery. This will prevent a fire in the event of a shorted cable. See the chart below to determine the correct fuse value.
INTERNAL
The REFERENCE404s amplifier is fused with 
REFERENCE404s Amplifier Fuse Values
Amplifier  | Amplifier Fuse  | Battery Fuse  | 
  | 
  | 
  | 
REFERENCE404s  | (2) 25 amp automotive  | 60 amp  | 
  | 
  | 
  | 
WIRING (cont.)
REMOTE TURN-ON 
Connect the “Remote” to the 
SIGNAL CABLE
Use a 
SPEAKER CABLE
The REFERENCE404s amplifier will accept up to 8 gauge speaker cable. Use a high quality, flexible, 
WIRING DIAGRAM
10  | 11  |