NAIM NAP250 MOD
It is LJM''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s imitation of NAP250 and an improved version.
Compared with NAIM NAP140 200, the performance is better, but the price is lower.
The NAP250 MOD version adopts MINI''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s circuit board design scheme, which reduces the length of PCB wiring.
At the same time, the resistance effect of PCB wiring is reduced.
The shorter the PCB copper wire, the lower the resistance, and the performance will be improved.
In addition, the NAP250 MOD version has modified some of the original bugs. The temperature compensation tube and the high-power tube can be installed on the same radiator.
In this way, NAP250 MOD can work in CLASS AB.
Avoid crossover distortion.
And several other obvious bugs in the original factory.
So the effect of NAP250 MOD is better than the original copy version and it is more cost-effective.
The weight of dual-channel 2 boards is 100 grams, not counting the weight of the package.
Working parameters:
Power supply voltage DC +-15V to DC +- 40V.
Output power = RMS 80W 8R(DC+-40V)
Recommended value of quiescent current: the voltage across the cement resistor = between 1.5 MV and 3 MV
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, & ;nbsp; 30K HZ -52DB.
Measurement data: large images can be downloaded. Audio Precision 2 TEST
FFT Audio Precision 2 TEST
Second, third, harmonic distortion distribution diagram:
Output signal-THD+N Audio Precision 2 TEST test chart