How to build a band pass filter?

[audioguru]

You keep assuming a speaker

The very first post has a sig gen , the filter then a speaker: "If I connect a signal generator to a speaker with the band pass filter in 1 of the wires to the speaker it should block all the other frequencies of the signal generator except the 3KHz tone."
No power amplifier was mentioned.

 

[Nigel Goodwin]

The very first post has a sig gen , the filter then a speaker: "If I connect a signal generator to a speaker with the band pass filter in 1 of the wires to the speaker it should block all the other frequencies of the signal generator except the 3KHz tone."
No power amplifier was mentioned.

Check post #8

"It has nothing to with speakers crossovers. It has to do with sound."

We've still not the slightest idea what he on with!.