JOYCRAFT DIY Series 

OA-JC5 Tube Headphone Amplifier
A vacuum tube amplifier that delivers emotional, lifelike midrange expression

The OA-JC5 is a hybrid headphone amplifier equipped with a traditional 12AU7 vacuum tube in the preamp stage and 2SA1943 and 2SC5200 transistors in the output stage. This design combines the warmth of vacuum tubes with the precision of transistors to provide a rich and clear sound experience. The subtle glow of the filaments and the blue LED indicator lights enhance the immersive feel, deepening your connection to the music.

By optimizing the layout of the rear-stage circuit, we have achieved low-noise, high-purity signal amplification. This allows musical nuances and emotional expressions, which are inherent in the piece, to fully expand and resonate.

Specifications

• Type: Headphone Amplifier
• Supported Frequency Range: 10Hz-80kHz (+/-1dB)
• S/N Ratio: 90dB
• Total Harmonic Distortion + Noise: 0.49% @1kHz
• Stereo Crosstalk: 65dB @1kHz 32ohm
• Maximum Output:
  1W @16ohm
  720mW @32ohm
  100mW @300ohm
  60mW @600ohm
• Input Sensitivity: 500mV
• Input Impedance: 100k ohms
• Output Impedance: < 1 ohm
• Headphone Output Impedance: 8-600 ohms
• Gain: +12dB
• Analog Output: RCA
• Analog Input: 6.35mm
• Volume Control: Analog knob
• Dimensions (mm): 125 x 100 x 70

※This product requires self-assembly by the customer. (Assembly services are not available.)
※The unit requires a separately sold (DC 20V) AC adapter to operate. (PD-compatible AC adapter and USB-C cable are not included.)
※We generally do not accept returns or exchanges except for initial defects (within one month of purchase). (Examples: no current flow, no sound, etc.)
※Damage or malfunctions caused by the replacement or modification of vacuum tube parts are not covered.