Can you tell me the usefulness of this crossover network for my speaker system ?
Learning; Generally the more parts in the crossover the better. You should start with the simplest crossover and work your way up.
The simplest crossover is to use a cap in series with the tweeter and nothing on the woofer speaker. Then you have a cap in series with the tweeter and a coil in series with the fullrang speaker. Then you have the crossover shown.
The only way to get good "bass effect" is to have a separate subwoofer.
The only way to get good "bass effect" is to have a separate subwoofer.
Andy