1. This is assembled board and tested well, just need to connect power cord, audio input and output cable. 
 
2. Homemade shell must be open enough heat emission holes, preferably 50%, at least 30% of the shell room for heat dissipation, it matters the service life of the tube amplifier. 


Product Parameters:
- Voltage amplification tube: 2pcs 6J1 (can be replaced by WE403/CV4010/6AK5/EF95)
- Power amplifier tube: 2pcs 6P6P (can be replaced by 6V6)
- Input impedance: 10KΩ
- Output impedance: 4Ω/6Ω/8Ω/16Ω
- Output power: 3W+3W
- Frequency response: 30-40KHz (-1dB)
- Input sensitivity: 500mV
- Signal to noise ratio: -80dB/3W
- Residual noise: <0.5mVac
- Input AC working voltage: 85-264Vac (Global)
- Current consumption power: 36W
- Net weight: 1.1kg

Premium Components:
- Output transformer made of Z11 silicon steel sheet and oxygen-free enameled wire
- Japanese potentiometer
- German coupling
- Schottky diode
- High quality diode
- Japan high frequency low resistance 105-degree capacitor
- High voltage controller

Attention:
Your self-made shell must have enough heat dissipation holes. It is recommended that 50% of the shell area is uses as dissipation holes, and at least 30% of the area should be used as heat dissipation holes. The life of the machine with a good heat dissipation hole can exceed 10 years. The life of the machine without cooling holes or unreasonable cooling holes may not exceed 1 year!

Package Included:
- 1 x Set of Tube Power Amplifier