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Title: A50s Balanced Headphone Amplifier  
Category: Audio/HiFi  
Brand: NFCA Fantasy  
Description: A dual‑mode desktop headphone amp delivering 4.4 mm balanced output or 6.35 mm single‑ended with ultra‑low noise and 6 dB gain steps.  
Details: It offers 42 Vpp swing, <0.3 µVrms noise, sub‑0.1 Ω output impedance, and automatic switching between pre‑amp and headphone‑amp modes.

Price is $