I'm wondering if anyone else has noticed an emphasis on low sibilance in the LCD-2. I've been listening on a Woo WA6SE amplifier and didn't particularly notice it, but upon switching to a Hifiman EF5 I started to notice it. At first I thought this was an issue with the EF5, but after trying several tubes (of quite different tonal character) it was always there. And then when I switched back to the Woo, I realized it was still there, just less noticeable. It's not much of a problem, but I'm just trying to determine the source of it.