Feliks Audio Echo Mk II - Tube Headphone Amp & Preamp - MINT! - $599 (Patty Jewett)

Exceptional output transformer-less (OTL) headphone amplifier from Feliks Audio. Fantastic sounding audiophile amplifier hand made in Poland. Perfect functional condition. Mint physical condition, not a mark on the unit I can find. Tubes are like new as the unit has less than 50 hours total use. Also offers outstanding performance as a preamp mated to Solid State or Tube amplifiers. Recommended for high impedance (>100 Ω) dynamic driver headphones. Cash only. Included - Echo Mk II amplifier - AC cord (US) - Stock tubes (6N6P & 6N1P) - Product Guide - Original Box with foam protective packaging - .5 Meter interconnects Specifications - Impedance: 100 kΩ - Optimal headphones impedance: 80Ω – 600Ω - Frequency response: 15 Hz – 45 Khz +/- 3 dB - Power output: 350mW - Amplification level: 20dB - THD: 0.4 % (300Ω, 20 mW) - Headphones output: 6.3mm - Tubes: (x2) 6N6P, (x2) 6N1P - Inputs: (x3) RCA line inputs for CD, Streamer etc. - Line Out (Preamp): (x1) RCA - Weight: 7.7 lbs - Dimensions: 8.7" x 4.5" x 10.4" (w/o tubes) Amplifier, Headphones, Cable, Cassette, CD Player, DAC, Phono Cartridge, Phono Stage, Preamp, Receiver, Reel to Reel, Speakers, Sub Woofers, Tape, Tubes, Turntables. Acoustat, Adcom, Altec, Amber, Audible Illusions, AudioQuest, Audio Note, Audio Research, Audio Technica, AV123, B&K, B&W, Cambridge Audio, Cardas, Carver, Classe, Conrad-Johnson, Counterpoint, Dahlquist, Dali, Definitive Technology, Denon, Dynaco, Dynaudio, Emotiva, Epos, Forte, Gallo, GAS, Grace, Hafler, Harbeth, Harman Kardon, JBL, Jeff Rowland, Jelco, Klipsch, KEF, Krell, Linn, Luxman, Magico, Magnepan, Marantz, Mark Levinson, Martin Logan, MBL, McIntosh, Michell, Micro Seiki, Mission, Modwright, Musical Fidelity, Music Hall, NAD, Naim, Nakamichi, Onkyo, Oracle, Ortofon, Paradigm, Parasound, Pass Labs, Pioneer Elite, Proac, Pro-Ject, PS Audio, Quicksilver, Rega, REL, Rogers, Rogue, Rotel, Sansui, Schiit, Sennheiser, Snell, Sony, Soundlabs, Spica, Sumiko, Sumo, Sunfire, Tascam, Teac, Technics, Thorens, Threshold, Totem, Vandersteen, Velodyne, Vienna Acoustics, VPI.