NAP250 MOD version of the MINI circuit board design, reducing the length of the PCB wiring, but also reduce the impact of PCB wiring resistance.
PCB copper wire shorter, the smaller the resistance, the performance will be improved.
In addition, NAP250 MOD version of the original modified some of the BUG, the temperature compensation tube and high-power tube installed in the same radiator.
So that NAP250 MOD can work in the CLASS AB, to avoid the cross-distortion and several other obvious BUG.
So NAP250 MOD effect is better than the original copy version, cost-effective program.
Two-channel 2-plate weight of 100 grams, not the weight of packaging.

Working parameters:
Power supply voltage DC + - 15V to DC + - 40V.
Output power = RMS 80W 8R (DC + - 40V)
Quiescent Current Recommended: Voltage at both ends of 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)

Data:

 Frequency response: 20HZ -0.04DB, 20KHZ -0.34 DB
                  15HZ -0.05DB, 30K HZ -52DB.
Measurement data: downloadable. Audio Precision 2 TEST

FFT Audio Precision 2 TEST

Second, third, harmonic distortion map:

Output signal - THD + N Audio Precision 2 TEST test chart