I thought that was the case, just not sure.
You use any other cans but Grado's thru the woo ?
It is a great looking amp.
Thank you, and no I only own Grados. But in the past I've owned some Koss headphones, Bose, and Sony, but I wasn't into headphones at that time (25+years ago), I was into speaker systems, but due to my recent blindness/living space I turned to headphones and I'm so glad that I did because even though back in the day I had a very nice system, what I hear out of my headphone rigs probably would have cost $20,000+ to hear what I'm hearing from my headphone set up. I'm very impressed with headphones, I never knew what I was missing, and I was missing a lot!