best headphones for plugging into amplifier
The first thing that struck me about the Douk Audio U3 PRO HiFi Class A Headphone Amp 1500mW wasn’t its sleek look but rather its powerhouse output. After hands-on testing, I was impressed by how effortlessly it drives high-impedance headphones—up to 600Ω—with minimal distortion. Its built-in voltage boost circuit ensures warm, detailed sound, perfect for … Read more