[Voice description]
6J1+6P13 fever tube power amplifier board, strong output power, fresh and natural sound quality, wide dynamic range, rich harmonics! The overall feeling is similar to 6V6.

【Features】
The signal source can be a CD player and a computer audio source (the computer sound card must have a line output port)
1. All AC filaments are used to light the lamp, and it is close to the horn with a sensitivity of 90DB. You can't hear a little hum noise, and it feels as quiet as if it is not turned on.
2 Adopt 6P13 class A amplifier circuit driven by 6j1, output 6w+6w power. It is suitable for speakers whose impedance is (4-8) ohm and sensitivity is above 88db.
3 The volume potentiometer adopts Japanese ALPS 16 type potentiometer to ensure clear positioning and left and right balance.
4 Use metal film resistors and imported electrolytic capacitors with an accuracy of up to 1%, and use Nichicon oil-immersed capacitors from Japan or WIMA from Germany for coupling. The power filter capacitor adopts PHILIPS blue shell or Hitachi blue shell fever electrolysis.
5 C (capacitor) L (optional choke coil) R (resistance) C multi-stage filtering, high signal-to-noise ratio.

6 PCB size is 200MM*100MM, double-sided copper clad laminate, wiring is strictly in accordance with one-point grounding method, and the noise floor is very slight.

【Parameters Table】
Input: one RCA input
Output: Stereo 6w+6w, can be connected to 4 ohm or 8 ohm speakers
Frequency response: 35-22KHz ±2db
Output Signal to Noise: >97dB "A"-wtd
Output THD: <0.15% 30Hz to 20kHz at 4W