My LS-100 replaced a Consonance Cyber 222 mkii, which replaced a Wright Sound WLA12A. As you can see, I'm a fan of the 6SN7. :-) The LS-100 has been terrific in my system, especially after procuring some Sophia 6SN7s and a Synergy HiFi 5AR4. I've had it for 4 years now, longer than any previous preamp, and I've no desire to upgrade.
