The following product descriptions, specifications and images are provided by the manufacturer.
LHY Audio EFI is a two-port Gigabit Ethernet filter that converts the network signal through dual photoelectric modules to break the electrical path between router and streamer. It provides plug-and-play optical galvanic isolation without requiring an external fiber cable.
Why it stands out
Optical isolation inside one chassis
Dual photoelectric modules interrupt the direct copper path.
Simple two-port installation
One LAN input and one isolated RJ45 output simplify setup.
Dedicated low-noise power stages
Independent LT3042+PNP regulation supports the conversion modules.
Built for audio endpoints
The one-in/one-out layout targets the final link before a streamer.
Best for
- Single network streamer installations
- Systems affected by Ethernet ground noise
- Isolation without external fiber modules
- Compact high-end network audio systems
Not ideal for
- Users needing multiple Ethernet outputs
- 2.5GbE or 10GbE endpoints
- Systems needing routing or Wi-Fi
- Users wanting an external SFP link


EMiUZEK Buying Notes
- EFI is an isolator, not a switch or router.
- Both external connections are Gigabit RJ45.
- Place it near the streamer and use the isolated output.
Frequently asked questions
Does EFI require fiber cables?
No. Optical conversion is internal.
Does it add network ports?
No. It is one input and one output.
What speed does it support?
Gigabit Ethernet.
Can it connect directly to a streamer?
Yes.
Is it a managed switch?
No.
Does it replace the router?
No. Install it downstream.
HOW TO CONNECT
Router to streamer
Source: Router or switch
Connection: LAN-IN RJ45
Output connection: Isolated RJ45
Target: Streamer
Switch to bridge
Source: Ethernet switch
Connection: Gigabit RJ45
Output connection: Isolated RJ45
Target: Network bridge
Final-stage isolation
Source: Home network
Connection: Ethernet to EFI
Output connection: Ethernet
Target: Streamer near audio rack
Technical Specifications
| Feature |
Specification |
| Product type |
Optically isolated Ethernet filter |
| Input |
1 × Gigabit RJ45 |
| Output |
1 × isolated Gigabit RJ45 |
| Isolation |
Dual photoelectric conversion modules |
| Regulation |
Dual LT3042+PNP stages |
| Power |
AC 100–240V |
| Dimensions |
150 × 175 × 50mm |
| Weight |
1.5kg |
Additional Product Content
📊 Comparison: Which Ethernet Isolation Approach Is Right for You?
Choose EFI for single-box RJ45 isolation; FMC suits a visible SFP fiber link, while AS6 adds switching and multiple ports.
| Feature |
LHY EFI |
LHY FMC |
LHY AS6 |
| Role |
Inline RJ45 isolator |
Fiber media converter |
Network switch |
| Connections |
RJ45 in / RJ45 out |
RJ45 + SFP |
5 RJ45 + SFP |
| Fiber cable |
Not required |
Required for optical link |
Optional |
| Endpoints |
One |
One per converter path |
Multiple |
| Clock input |
No |
No |
10MHz |
| Best fit |
Final-stage isolation |
Fiber bridge |
Audio network hub |