Success! After installing the Corning 9/125 fiber I just installed the MGB-TLX 1310 nM optical transceivers, and I'm back up and running! These transceivers sound smoother and sweeter than the Finisar 800nM transceivers when used with the Corning 9/125 fiber, so I suspect there is an transceiver x fiber interaction that is audible.
Sounds really nice: "smoother and sweeter" than the previous set-up, "airier", and the bass has more definition and body as well.
Bottom-line: SFP optical transceivers (and very likely, LC/LC fiber)... sound different. Welcome to high-end audio. Doh! 
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Lumin P1 streamer/DAC/preamp, Constellation Inspiration integrated TT: Michell Gyro SE MkII, SME V, Koetsu Urushi Vermilion, EAR324. Harbeth 30.2s, REL R-305, Shunyata Alpha V2 ICs, Alpha V2 SPs, Sigma XC, Sigma NRv2, Omega QR-s & Alpha NRv2 PCs, segmented Altaira SG stack w/ Alpha & Omega CGCs, Everest 8000 PD. Remote Server Room: Uptone EtherREGEN, AfterDark Master Clock & LPS, Alita, Battle Angel, (Akasa NUC Roon Core), iFi DC Purifiers (for SMPS used for Alita & router), Shunyata Gemini combo power distributor & Altaira-type CG GP-NR hub, Venom & Alpha CGCs, Shunyata NRv14 power cords for digital components.
Last edited by Puma Cat; 03-11-2023 at 09:43 PM.
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