IR Control Protocol
The EA-AMP-SUB-1D-500R uses NEC format infrared signaling as its sole external control interface. There is no RS-232, no serial command protocol, and no IP control. For a product designed for the Control4 / custom installation ecosystem, this is an unusual omission. IR is the only way to automate this amplifier from an external controller.
Connection
Section titled “Connection”The IR input is a 3.5mm mono mini jack on the rear panel. This accepts a wired IR emitter, which is the standard approach in rack-mounted AV installations where line-of-sight IR is impractical.
Device IDs
Section titled “Device IDs”The amplifier supports four selectable device IDs, configurable through the front panel menu under IR DEVICE ID. This allows up to four EA-AMP-SUB-1D-500R units to share a single IR bus (or Control4 IR port) without command collisions. Each device ID responds to a unique set of NEC hex codes.
Available Commands
Section titled “Available Commands”Each device ID supports the full command set listed below. The specific NEC hex codes for each device ID and command are documented in the control protocol PDF and the IR codes spreadsheet, both available from the SnapAV product page.
| Function | Commands |
|---|---|
| Power | Toggle, On, Off |
| Mute | Toggle, On, Off |
| Night Mode | On, Off |
| User EQ | Flat, Music, Movie |
| Volume | Up, Down, 100%, 90%, 75%, 50%, 25%, 10% |
The discrete power on/off, mute on/off, and fixed volume level commands are particularly useful for automation. A Control4 driver can send “Power On” followed by “Volume 75%” to guarantee a known state without needing feedback from the amplifier, which is critical given that the amplifier provides no status readback over any interface.