Here was a quote from user
@Taisser Roots after a brief try of a Glenn OTL amp at London CanJam last weekend. I'm not sure how much burn in the amp had, which tubes were in use or other customization options the amp had, but it makes me wonder what the $1700 IHA1 tube amp that appears a bit smaller may have against the Glenn amp.
"Glenn otl
no proper reference here
Nice slam
Less air than the iha1, it's definitely darker.
Similar resolve to that thing, I think more dynamic than the iha1. (Actually iha1 is more resolving by a good amount)
Less stage cohesion, but the seperation and stage still come across naturally, not as wide as the iha1"
In response I did mention that the Glenn amps have a lot of potential depending on tubes used and other customizations. Though I still haven't heard the GOTL. It looks like it was finally their first time on exhibit, but somehow the setup didn't impress folks there too much.
@jelt2359 maybe you have an opinion too...