Tortuga Preamps

Passive with LDR and balanced connections.
Purportedly very transparent as it does not use transistors.
However, measured here:
https://www.neurochrome.com/tortuga-audio-ldr3/
The data seems to indicate significant distortion at attenuated volume levels.
If so, does this conflict with subjective opinions of transparency? How would this distortion manifest in listening, examples?

Anyone happy with theirs?

Thanks for your input