Feliks Audio Echo Classic upscaler An unused channel is switched

An unused channel is switched off directly at the input stage and thus cannot negatively influence the signal integrity

In comparison

when directed to the auricle and ear canal

IE 900 - The precision-manufactured aluminum housing of the IE 900 faithfully protects the dynamic TrueResponse transducers at the heart of Sennheiser’s innovative X3R technology

Feliks Audio Echo Classic upscaler An unused channel is switchedThe Feliks Audio Echo Classic is the most accessible way into the Feliks Audio tube amplifier lineup. Built as the purest expression of the Echo concept, it keeps the focus exactly where it should be: handcrafted Polish tube amplification, a warm and natural presentation, and strong synergy with high impedance headphones. As a simplified version of Feliks Audios best selling Echo platform, Echo Classic is made for listeners who want the tube