I need to build an active crossover circuit for my 2-way speaker design. I decided to use TDA2009 as my audio amplifier. TDA2009 is shown connected below in the picture. My question is: how can I modify the TDA2009 circuit to implement the circuit in the gray box?

I know that C10 and C11 are need for the DC battery to minimize noise as well as C1 and C2 (2.2uF). So these 4 capacitors need to stay in the circuit. What about C4 and C5 do I need them? or I just connect the high pass filter of the gray box directly to pin 8 and 4 of TDA2009 and the low pass filter directly to pin 10 and 2 of TDA2009? What do you think?

Finally I need it to be active filter that is my TDA2009 need to be placed after the filtering circuit (gray box).

Please I need your help concerning this. I came to this forum after weeks of research because I am really stuck.

Thank you for your help in advance :) enter image description here

  • 1
    \$\begingroup\$ I'm voting to close this question as off-topic because this is not about sound design, but electronics design. \$\endgroup\$ – Tetsujin Nov 19 '16 at 12:26
  • \$\begingroup\$ see (electronics.stackexchange.com/questions/270291/…) \$\endgroup\$ – carloc Dec 2 '16 at 9:23
  • \$\begingroup\$ An active crossover feeds two power amplifiers, not two speakers. You don't need an audio amplifier at all in this device, only op-amps. \$\endgroup\$ – user207421 Dec 2 '16 at 9:44

There are thousands of active crossover circuits out there on the interweb. This might be more appropriate on the SE: Electronic Engineering forum.


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