Feliks Audio Echo MK2 Headphone Amplifier

Your first proper tube amplifier
The Echo is an output transformer-less (OTL) headphone amplifier and preamplifier featuring 6N6P and 6N1P tubes. Despite being Feliks’ entry-level amplifier, the Echo is no slouch when it comes to presenting a highly musical and well-extended sound. The Echo is slightly warm, smooth, intimate, and laid-back, flattering a wide range of headphones.