A method for compensating for acoustic influence of a listening room on an acoustic output from an audio system including at least a left and a right loudspeaker, the method comprising: determining a left frequency response LP L as a function between a signal applied to the left speaker and a resulting power average in a listening position, determining a right frequency response LP R as a function between a signal applied to the right speaker and a resulting power average in the listening position, designing a left compensation filter F L based on the left response and a left target function, designing a right compensation filter F R based on the right response and a right target function, characterized by determining a filtered mono response LP M according to LP L F L + LP R F R, determining a filtered side response LPs according to LP L F L - LP R F R, wherein LP L is the left frequency response, LP R is the right frequency response, F L is the left compensation filter and F R is the right compensation filter, designing a mono compensation filter F M based on the filtered mono response LP M and a target function, designing a side compensation filter Fs based on the filtered side response LPs and a target function, and during playback: receiving left and right input signals, and applying the left compensation filter to a left filter input, applying the right compensation filter to a right filter input, applying the mono compensation filter to a mono signal based on the left and right input signals, and applying the side compensation filter to a side signal based on the left and right input signals. determining a left frequency response LP L as a function between a signal applied to the left speaker and a resulting power average in a listening position, determining a right frequency response LP R as a function between a signal applied to the right speaker and a resulting power average in the listening position, designing a left compensation filter F L based on the left response and a left target function, designing a right compensation filter F R based on the right response and a right target function, characterized by determining a filtered mono response LP M according to LP L F L + LP R F R, determining a filtered side response LPs according to LP L F L - LP R F R, wherein LP L is the left frequency response, LP R is the right frequency response, F L is the left compensation filter and F R is the right compensation filter, designing a mono compensation filter F M based on the filtered mono response LP M and a target function, designing a side compensation filter Fs based on the filtered side response LPs and a target function, and during playback: receiving left and right input signals, and applying the left compensation filter to a left filter input, applying the right compensation filter to a right filter input, applying the mono compensation filter to a mono signal based on the left and right input signals, and applying the side compensation filter to a side signal based on the left and right input signals. receiving left and right input signals, and applying the left compensation filter to a left filter input, applying the right compensation filter to a right filter input, applying the mono compensation filter to a mono signal based on the left and right input signals, and applying the side compensation filter to a side signal based on the left and right input signals.