Equipped classic preamplifier NAIM NAC42.5 Preamplifier Finished Board


Note: This is a welding and testing of the finished board OK.

PLEASE NOTE THE BUYER: There is no wiring diagram, datasheet or instruction manual for this product. Please contact us by email if you need any help, we will try our best to help you, thank you!


Summary:

NAC42.5 preamplifier praised in the UK. The British thought it was the most beautiful preamplifier in the world. Circuit with UK NAIM original circuit. Although a bit exaggerated, you can still think of "NAC42.5" as high praise.

Using Toshiba low noise audio signal tube and tantalum capacitor input and output coupling capacitance.

Using precision voltage reference source ONSEMI M-otorola LM317T + OSCON polymer semiconductor capacitors as decoupling filter capacitor. Additional capacitance with high capacitance and inductance as secondary filter. Effectively reduces power supply noise.

PCB size: 65mm * 87mm

Input voltage: AC single 20V - single 24V

(You can also use two serial 10V or 12V implementations for single AC 20V).

SNR: 100DB

Voltage gain magnification: 11x

THD + N: <0.05%

Frequency response: 20Hz-20KHz -0.2db

Input impedance: 330K

Quiescent current: 22mA

 

Package:

1pc assembled classic preamplifier NAIM NAC42.5 preamplifier ready board



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Returns & Replacements & Repair:
We accept returns & replacements within 30 days from the day the customer receive the products, please make first contact within 30 days from receiving the order. Products should be returned in original condition. As a benefit to our customers, we also provide repair within 3 months from the day when this item is shipped out, after repair is done, we will send you the item, but the customer should pay both shipping ways.

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