100W Ultimate Fidelity Amplifier

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Just from listening to the one channel the sound is very tight and defined. A huge step up from my chip-amp builds. That is a good tip on cases. At first the prices didn't look too bad but once I size one big enough to also hold the transformer and power supply they get expensive fast.
 

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Hello my friends, hello APEX.
Please tell me about the APEX AX20P amplifier, when the power is turned on, the protection provides a delay of 3 ... 4 seconds, which is good, but when the power is turned off, a slap is heard in the speakers. tell me how to get rid of the slap in the speakers when the power is turned off. I am using not stabilized power supply with 20000uF capacitors per shoulder.
467012d1424435062-100w-ultimate-fidelity-amplifier-apex-ax20p-jpg
 
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Hope to provide the PP12 PCB and PUS, adjustment parameters of this ear amplifier, thank you!

Greetings my friends. I finished assembling the headphone amplifier. I liked the sound, good power, no distortion. Tested with Pioneer headphones, 32R impedance.

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Плата усилител&#11.JPG

Thanks to APEX for this project, thanks to AlexMM for the PCB layout.
I want to add that initially the board has a small error, there is no connection of two diodes with GND in the protection circuit, I have completed the missing jumper.