QUASI Amplifier for Beginners

hi Apex..

i want to continue this PCB project,
what the additional circuit to complete perfect power amplifier (PA),
for illustration:

input--->APEX550--->output

what kind of input and output circuit for best PA?
can give me the circuit schematics,

thanks
 
With only 3 wire for connect this VU meter can be add to amplifier, and you have 4 LED display per channel.
 

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boa tarde aqui é charlestron, do pais Brasil,gostaria de saber se algum membro des forum tem o layout + pcb do aamplifier matrix 1,4 de 1500e 2ohms, meu email é -

Good afternoon here is charlestron, the country Brazil, I wonder if any forum member has the des + pcb layout of the matrix aamplifier of 1.4 1500e 2ohms, my email is -

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