An audio signal enhancing device for enhancing a stereophonic input signal comprising two audio input signals (102, 104), the device comprising: signal enhancement means for processing the two audio input signals to generate at least one enhanced signal, the signal enhancement means comprising: two parallel processing lines comprising a first and a second parallel processing branch each, one signal being processed by the first parallel processing line and the other signal being processed by the second parallel processing line, each first processing branch comprising adaptive filter means (318; 320), and each second processing branch comprising means (310; 312) for delaying a signal; means for combining, by a weighted summing operation, an output signal of the first processing branch of the first processing line with an output signal of the second processing branch of the second processing line to generate a first enhanced signal; means for combining, by a weighted summing operation, an output signal of the first processing branch of the second processing line with an output signal of the second processing branch of the first processing line to generate a second enhanced signal; and means for combining, by a weighted summing operation, the first and second enhanced signals to generate a third enhanced signal; and control means for controlling the signal enhancement means, wherein the control means is adapted: to analyse at least one of the audio input signals (102, 104), at least one of the signals (314, 316, 322, 324, 340, 342) of the first and second processing branches of the first and second processing lines, or at least one of the enhanced signals; and to subsequently use the result of said analysis to dynamically vary adaptive filter coefficients of the adaptive filter means (318; 320) or delay coefficients of (310; 312) the first and second processing branches. signal enhancement means for processing the two audio input signals to generate at least one enhanced signal, the signal enhancement means comprising: two parallel processing lines comprising a first and a second parallel processing branch each, one signal being processed by the first parallel processing line and the other signal being processed by the second parallel processing line, each first processing branch comprising adaptive filter means (318; 320), and each second processing branch comprising means (310; 312) for delaying a signal; means for combining, by a weighted summing operation, an output signal of the first processing branch of the first processing line with an output signal of the second processing branch of the second processing line to generate a first enhanced signal; means for combining, by a weighted summing operation, an output signal of the first processing branch of the second processing line with an output signal of the second processing branch of the first processing line to generate a second enhanced signal; and means for combining, by a weighted summing operation, the first and second enhanced signals to generate a third enhanced signal; and two parallel processing lines comprising a first and a second parallel processing branch each, one signal being processed by the first parallel processing line and the other signal being processed by the second parallel processing line, each first processing branch comprising adaptive filter means (318; 320), and each second processing branch comprising means (310; 312) for delaying a signal; means for combining, by a weighted summing operation, an output signal of the first processing branch of the first processing line with an output signal of the second processing branch of the second processing line to generate a first enhanced signal; means for combining, by a weighted summing operation, an output signal of the first processing branch of the second processing line with an output signal of the second processing branch of the first processing line to generate a second enhanced signal; and means for combining, by a weighted summing operation, the first and second enhanced signals to generate a third enhanced signal; and control means for controlling the signal enhancement means, wherein the control means is adapted: to analyse at least one of the audio input signals (102, 104), at least one of the signals (314, 316, 322, 324, 340, 342) of the first and second processing branches of the first and second processing lines, or at least one of the enhanced signals; and to subsequently use the result of said analysis to dynamically vary adaptive filter coefficients of the adaptive filter means (318; 320) or delay coefficients of (310; 312) the first and second processing branches. to analyse at least one of the audio input signals (102, 104), at least one of the signals (314, 316, 322, 324, 340, 342) of the first and second processing branches of the first and second processing lines, or at least one of the enhanced signals; and to subsequently use the result of said analysis to dynamically vary adaptive filter coefficients of the adaptive filter means (318; 320) or delay coefficients of (310; 312) the first and second processing branches.