Xiaocao Audio DIY(Fan group): 438857253
Baby introduction
Since our store launched NAP140 in 2014 and NAP200 in 2015, due to its simple production, low production cost, and super high music quality, the kit products launched by our store have been loved by fans at home and abroad. However, in early 2017, our store The NAP140 and NAP200 kits, finished boards and related accessories are discontinued. The reason why we discontinued all the accessories of NAP140/NAP200 is because after research, we found that we have found something more cost-effective and more fun than NAP140/NAP200. It is NAP150.
Before the development of NAP150, after 8 months of repeated research and experimentation, we found that NAP150 has the same musical quality as NAP200, and it also has a stronger musical taste than NAP200. NAP150 and NAP200 use the same PCB board. The integrated design is much simpler to make and looks neater than the complicated wiring design of the NAP140 spider web. Since NAP150 does not require a transformer as large as NAP200, a shorter chassis can be used at the same time(4307), The overall cost is lower than the NAP200, and the price-performance ratio naturally goes without saying. What needs special explanation is: the all-aluminum chassis must be used to install the NAP150, yes! If the iron case is used, the heat transfer efficiency is not enough, and the working current of the large tube cannot be stabilized, causing the power amplifier board to be burned. If the power amplifier board is damaged due to the unauthorized use of the iron case, our shop is not responsible, so fans must pay attention.
The PCB board used by NAP150 is still the best-quality military A-grade board in China. In order to ensure the quality of PCB and kits, Xiao Cao has undergone multiple proofing and screening in different factories, but in the end most PCB factories produce PCB circuit boards were not up to our requirements, until we finally found the factory that produced circuit boards for China’s Shenzhou-6 spacecraft that year, the circuit boards they produced met our process requirements, the quality is very high, Taobao is now large Most sellers who make power amplifier boards usually find a circuit that has been modified on the Internet and start to make the board. The power amplifier produced in this way is not guaranteed at all, and it can almost make a sound. The sound is no longer the original one. It is very irresponsible. Our power amplifier boards are copied out by dismantling the original machine. Both the circuit structure and component parameters can be guaranteed to be 100% consistent with the original machine, and our transistors and large capacitors are important The accessories are purchased directly from abroad. They are by no means comparable to the power amplifier boards of ordinary Taobao sellers. You can buy them with confidence.
NAP150 technical parameters
NAP150 pcb size:280mm*235mm
AC working voltage :27V -0- 27V
Require transformer power : 300w
Output power: 8 ohm 60w+60w, 4 ohm 120w+120w, strong power can drive most speakers on the market.
NAP150 matching transformer:https://item.taobao.com/item.htm?spm=0.7095261.0.0.6f9d1debK9LDGw&id=566341354795
NAP150 related price list
The kit does not contain large capacitors ----- 378 yuan
The finished board does not contain large capacitors---------------438 yuan
Finished board(Includes 4 KEMET capacitors)----778 yuan
Please go here to purchase the NAP150 supporting pre-stage:https://item.taobao.com/item.htm?spm=2013.1.20141001.1.538632deQHg9SO&id=557501947305&scm=1007.12144.81309.42296_42296&pvid=1737912a-57c2-4d31-8e18-95288493d274
NAP150 original machine disassembly diagram
Since the installation method of the large pipe of the NAP200 is more brief and convenient, we canceled the installation method of the large pipe of the original NAP150, and replaced it with the same installation method of the NAP200.
The following is the internal diagram of the NAP200 finished machine made by our shop before,
The structure is almost everyone can refer to.