Introduction:

NAIM From NAP135 to NAP250, although the circuits of each series are very close; we all take the time to listen and distinguish, however, NAP250 is one of the most amazing models, giving people the greatest feeling is noble.

NAIM power amplifiers have always been loved by audiophile players. The circuit is not too complicated, low power consumption, low investment, good sound quality, and has become a classic in the HIFI world. Its sound is high, medium and low-pitched, and it is very moderate. It makes people fascinated when they hear it. All the details are just right, there is no extra noise. The treble is transparent, the midrange is balanced, and the bass is powerful.

NAP250 is a higher-end model, using a gold-sealed triode as a power output tube, NAIM tastes more. The product is equipped with a fever device. The amplifier board uses 718 resistors (the power board uses a metal film resistor), WIMA capacitors.

 

This is an Type-F angle aluminum, and you can directly install the power amplifier on the chassis to cool the temperature.

 

Debugging method: Measure the voltage at both ends of the 0.22R resistor on the PCB to be 1.5-2mV.

 

NOTE: All gold seal pins and screws require insulation treatment.  Due to the cessation of production of ZTX653/753, We use ON 2N5401 replaced ZTX753 and 2N5551 replaced  ZTX653.

 

The 4pcs MJE15024 are used. but they are 100% original and working performance is Excellent !!!

 

■ Input voltage: DC +/-28V

■ Output power: 80W x 2 (8Ω load)

■ Input impedance: 18 kΩ

■ Gain: +29 dB

■ Frequency response: 3Hz – 50kHz (-3 dB)

■ Load: 8 Ω

■ PCB size: 94mm*138mm

 

NOTE: We have DIY kit or Finished board (Optional)