Cayin C9: Dual Nutube, Fully discrete Fully Balanced Class A/AB Portable Headphone Amplifier (Like New)

Cayin C9: Dual Nutube, Fully discrete Fully Balanced Class A/AB Portable Headphone Amplifier Fully balanced, fully discrete, 4-channels high-fidelity headphone amplifier delivers up to 4,100mW (at 16Ω) or 2600mW (at 32Ω) per channel. Select between Vacuum Tube and Solid State timber on both balanced and single-end inputs. The tube timber circuit is designed around a pair of KORG Nutube vacuum tubes. Switch between Pure Class A and Class AB amplification modes. Dual input mode: regular LINE input mode and PRE-amp input mode (or known as pure power amplifier mode). Supports 3.5mm SE and 4.4mm BAL for both input and output, the amplifier will also optimize BAL to SE or vice versa. 4-channels ALPS potentiometer with a pair of stereo electronic volume. Removable battery module with 4x user replaceable Sony18650 rechargeable lithium batteries.