Feliks Audio ECHO 2

Supersonido describes the bass as detailed and the midrange as precise, with vocals given particularly satisfying presence. Audiophile Heaven also hears genuine depth from the amplifier, though neither review makes an extended case for highly analytical or reference-style resolution.

Reviewers strongly favour its tube character: Audiophile Heaven highlights rich harmonics and depth, while Supersonido finds the bass warm and smooth and the vocal range highly engaging. Treble is described as attenuated and controlled, suggesting a forgiving rather than overtly sparkling balance.

Supersonido reports increased output power over the earlier model and improved pairing with lower-impedance headphones and planars. Audiophile Heaven finds its performance with dynamic headphones superb, but notes that planars can lose some of the control and authority available with dynamics.

Supersonido reports better isolation from interference in the revised model. The reviews do not provide direct listening evidence with sensitive IEMs or describe background silence, hiss, or hum in detail.

Feliks Audio specifies an 80–600-ohm headphone range, and Audiophile Heaven considers the OTL design especially successful with high-impedance dynamic headphones. Supersonido notes improved lower-impedance and planar matching, although Audiophile Heaven still finds those pairings less controlled and authoritative than dynamic-headphone use.

Audiophile Heaven notes that the amplifier is hand-built in a workshop and tested before shipment. Supersonido highlights a revised chassis finish that is more resistant to scratches, impacts, and fingerprints, although long-term durability is not discussed.

The Echo 2 provides three RCA inputs, an RCA preamp output, and a 6.3 mm headphone socket. The preamp function usefully extends it to active-speaker systems, but this remains a focused analogue amplifier without digital inputs, balanced headphone outputs, or remote operation.

Supersonido calls the Echo 2 an outstanding choice for listeners entering tube amplification and praises its price-to-performance proposition very strongly. Audiophile Heaven considers roughly €800 a relatively costly entry beside many Chi-Fi alternatives, but also points to hand assembly and individual testing as meaningful justification.