product description
Refer to the US Perth PASS A3 circuit. All FETs are assembled with prototype models. The input differential tube uses the new FU9210 from the US, the power tube uses the new N-channel IRFP250 from the US, and the input and output FETs are precision matched (1% accuracy).
Focus on the feedback capacitor, use the new ELNA CERAFINE series, dynamic and strong guarantee.
Sound style: sweet and honest, the music is very good and transparent. The sound can exceed many amplifiers.
Detailed parameters
Working voltage: recommended DC: +-25V
Power: 30watts @ 8ohms; 60watts @ 4 ohms
Distortion rate @ 1 KHz: 1% at rated output;
0.003% @ 5 watts into 8 ohms
Input impedance: 36kohm balanced, 18kohm single ended
Output noise: <300uV unweighted 20-20kHz
Dynamic range: 140dB
Gain: 26 dB
Signal input support: balanced input or unbalanced input
Product Size
PCB size:122mmX74mmX1.6mm
Instructions for use
Kit debugging tips: The input tube and the output tube are paired. When the player is actually installed, please test the 0.47R non-inductive cement resistor. Select the two closest ones on the same side so that the tube can heat evenly.
Finished board is finished by us, debugged and tested successfully
Precautions
Note: Single-ended Class A heat is huge A heat sink must be installed to energize. Otherwise it may burn. It is recommended that each plate radiator be larger than 2kg.
The list of goods
Kit: PASS-A3 two-channel kit X1, requiring buyers to complete welding and commissioning
Finished board: PASS-A3 two-channel finished board X1, we complete welding and debugging.