That being said I can also feel a latency with the Kemper especially next to an amp and also to the Atomic Amplifire which for some reason is almost as direct as an amp.
The qc is said to have a latency around 3ms which is a comparable to the Kemper. I believe Amplifire’s latency is lower than 1.5ms. It doesn’t sound like much but it’s a noticeable difference.
3ms is as if you were one meter away from your speaker. I can't feel or hear any latency at 3ms.