What is an OTL amp? Headphones from Focal, Grado, AKG, etc LOVE tube OTL amps from Feliks Audio.

Kevin talks about how "power means nothing for performance" when it comes to tube amplifiers. It's bandwidth. And bandwidth is dictated by output transformers. But how can we get rid of them? Or can we?

Check out what Kevin means as he discusses the Feliks Audio range of headphone amplifiers, some OTL, and one that actually uses a transformer. https://upscaleaudio.com/collections/feliks-audio