How to cut mid and high frequencies for speakers?

Question

Audio

In general, I have 6 sockets on the sound card: green (default), red (microphone), orange, black, white and blue. Next, I have large speakers and headphones. I want to make the green headphone jack work as usual, and the orange / black jack (the black jack is preferable, because the orange one cuts off one speaker) transmits only low frequencies to the speakers, i.e. obezat medium and high frequencies. How to do it programmatically, without soldering, etc. on Ubuntu 14.04?