NAP250 MOD version of the MINI circuit board design, reducing the length of PCB wiring. While also reducing the impact of PCB wiring resistance. And modified version.
In addition NAP250 MOD version of the original modified some BUG. So that the temperature compensation tube can be installed with the high-power tube in the same heat sink. So that the NAP250 MOD can work in CLASS AB. To avoid the ross-distortion.
Input voltage: DC +/-15V — DC +/-40V
Output power: RMS 80W 8R (DC +/- 40V)
Quiescent current recommended value: the voltage across the cement resistor = 1.5 mV-3mV, the current is about 10—20 mA.
THD + N: 0.001% — 0.03% (20Hz-20KHz 5W —- 30W 8Ohm Audio Precision 2 TEST)
NOTE: This is a finished board for welding and testing OK.
Frequency response: 20Hz -0.04Db, 20KHz -0.34 Db
15Hz -0.05Db, 30K Hz -52 Db.
Measurement data: Audio Precision 2 TEST