Mixing board for audio signals

An electrically analog and entirely passive stereo mixing board for sound signals received on at least two stereo channels, which includes a combination of the following circuits:

• a first circuit for pre-listening to the sound signals through headphones that can be connected, a second circuit for changing the timbre by means of a sound filter, and
• a third circuit for cross-fading or mixing sound signals of the channels by means of a cross-fader, and which comprises several outputs, wherein the sound signals received on the stereo channels (2, 3) are headphone output signals of players, the relevant channels (2, 3) are divided by means of dividing circuitry and the signals are passed on to the outputs (4, 5) in parallel and without amplification a) through a passive sound filter (10) and subsequently a passive cross-fader (11) to an output (4) to which an amplifier can be connected, and b) via a switch (6, 7) of the relevant stereo channel (2, 3) to a headphone output (5) of the passive stereo mixing board (1), wherein the channels (2, 3) can be selected by means of the switches (6, 7) and wherein the cross-fader (11) comprises each of two different adjusters (14, 15 and 14x, 15x) which interact with each other and each of two of which are connected in parallel and controlled in phase opposition and which comprise terminals for two input signals on both sides, and two pickoffs of one adjuster (14, 14x) are connected with a ground while the pickoffs of the other adjuster (15, 15x) are intended for output signal.