In the end, I didn't feel like introducing a component with a switching power supply into my chain...
I forgot about purchasing the EFI and, for just over €140, I purchased two fiber media converters and their corresponding SFP modules on Aliexpress, a 7m fiber optic cable, two 5V linear power supplies, and two 50cm CAT8 Ethernet cables (which they claim to be made of UPOCC copper, but I don't believe that).
I hope I made the right choice.
LHY EFI ethernet filter
Is anyone using this LHY EFI Ethernet network filter?
https://www.lhy-audio.com/products/efi/
With what results?
The website states that "Dual independent LT3042+PNP circuits provide μV-level linear power supplies," but the only transformers I see are two IRM 10-5, which are switching power supplies.
I’ve spent a lot of time eliminating all switched-mode power supplies
from my hi-fi system, and I don’t want to use one using the EFI.
What do you think?
Could those SMPS introduce noise into the power grid that could negatively impact sound quality?
I also saw that before the two SMPS there are two EMI filters.
I raised these concerns with LHY (which is known to produce linear power supplies).
This was their response:
"Our EFI unit features a two-stage power design for clean and stable power.
The first stage uses a high-quality, low-noise switching power module for efficient power conversion.
The second stage employs an LDO linear regulator specifically to power the sensitive galvanic isolation and fiber optic transceiver modules.
This hybrid approach combines the high efficiency of an SMPS with the ultra-low noise performance of an LDO."
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