I’m certainly not trying to shoot the messenger here. I’m just relaying exactly what AR told me when I reached out. Ironically, the AR employee who responded to your email back in July 2020—Greg Christensen—is the same person who responded to my inquiry today.
My intent wasn’t to call you out or suggest that you provided bad information. If my earlier post came across that way, I apologize. What I was trying to convey is simply that the guidance AR is providing today appears to be different from the guidance they provided you six years ago.
I don’t have any issue with running KT150s, and it’s clearly a question many people have had over the years since it’s what prompted this thread in the first place. My search for answers actually started with your review. I noticed the note at the end mentioning the conflicting information regarding the amp’s ability to run KT150s in stock form and that you’d be reporting back in the future. I looked around for a follow-up but couldn’t find one, so I started digging elsewhere.
When I came across your post here showing AR’s response, I was excited because it suggested there might be additional options worth exploring. Before going down that road, though, I figured I’d go directly to the source and ask AR myself. As of today, their response is different from the one they provided you in 2020.
The only point I’m trying to make is that AR’s position appears to have changed over time. Whether that’s because of field experience, reliability concerns, warranty claims, or something else entirely, I honestly don’t know. I’m simply sharing the most current information I received directly from them so others researching the same question have another data point to consider.