schematic diagram simple sub woofer

Heres several full amplifier schematics! Have fun!
 

Attachments

That Greek sub-woofer filter circuit is a nightmare. It is a project at Electronics-lab.
Its schematic does not agree with its parts list which does not agree with its parts layout because some capacitors are actually two capacitors in parallel.

The translation from Greek to English is a joke.
 
A speaker makes a poor microphone because it has a low frequency resonance that makes it sound "boomy".
An electret microphone has excellent sound and is inexpensive and small.
 
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