Mixer configured for connection to a two or more component cartridge having a longitudinal axis L and comprising at least a first component A and a second component B, comprising an inlet region, a calming region and a mixing region, wherein the calming region is located between the inlet region and the mixing region, wherein the inlet region has at least a first inlet opening for entry of the first component A into the calming region and a second inlet opening for entry of the second component B into the calming region, wherein the first inlet opening has a first size F A and the second inlet opening has a second size F B, wherein the calming region comprises a first calming chamber having a first volume V A, and a second calming chamber having a second volume V B, wherein the first component A flows into the first calming chamber via the first inlet opening in a first flow direction and the second component B flows into the second calming chamber via the second inlet port in a second flow direction, wherein the first calming chamber and the second calming chamber are connected to the mixing region, and the calming region has a partition between the first calming chamber and the second calming chamber, which delimits the first volume V A from the second volume V B, and at least one wall (7, 7', 7") arranged transversely and/or perpendicularly to the first and/or second flow direction, configured for braking and/or deflecting the first inflowing component A and/or the second inflowing component B at the mixer-side end of the calming region, and wherein the first calming chamber and/or the second calming chamber having at least one deflecting wall for deflecting and conveying the fluid flow, which is arranged parallel to the axis L or along the axis L. wherein the inlet region has at least a first inlet opening for entry of the first component A into the calming region and a second inlet opening for entry of the second component B into the calming region, wherein the first inlet opening has a first size F A and the second inlet opening has a second size F B, wherein the calming region comprises a first calming chamber having a first volume V A, and a second calming chamber having a second volume V B, wherein the first component A flows into the first calming chamber via the first inlet opening in a first flow direction and the second component B flows into the second calming chamber via the second inlet port in a second flow direction, wherein the first calming chamber and the second calming chamber are connected to the mixing region, and the calming region has a partition between the first calming chamber and the second calming chamber, which delimits the first volume V A from the second volume V B, and at least one wall (7, 7', 7") arranged transversely and/or perpendicularly to the first and/or second flow direction, configured for braking and/or deflecting the first inflowing component A and/or the second inflowing component B at the mixer-side end of the calming region, and wherein the first calming chamber and/or the second calming chamber having at least one deflecting wall for deflecting and conveying the fluid flow, which is arranged parallel to the axis L or along the axis L.