The first and best cure for the ‘wall behind the monitor’ cancellation dips is to flush-mount the monitors in a hard wall – also called ‘infinite baffle’ or ‘flush-mounting’ - which totally eliminates this wall reflection and cancellation.
Second best is placing the monitor very close to the wall, which raises the cancellation frequency higher. This works well when the monitor is not too small. The risk is, with small monitors, which inherently are less directional in mid frequencies that the dip just moves to the low mid-band and causes even worse coloration. The distances between 0 and 20 cm (8") from the wall let the monitor response to be, in most cases, unaltered (first cancellation dip down to 430 Hz only); i.e. the directivity of the monitor is high enough so that the rear radiation cannot cause a severe cancellation. Additionally, the low frequency boost should be compensated for when the monitor is mounted close to the wall (maximum of +6 dB).
Alternatively, the third cure is to move the monitor considerably away from the wall: the cancellation frequency goes down so far that it is below the low frequency cut-off of the monitor. Thus, the minimum distance ‘monitor/wall behind’ depends on the monitor low frequency performance. However, at low frequencies and for large monitor, the minimum distance becomes very long and impractical.
(...) an acceptable response can be achieved at distances from the wall up to 1 m (3.3 ft). Beyond, the 1 m…2.2 m (3.3...7.2 ft) range should definitely be avoided. Large monitors placed at a distance greater than 2.2 m (7.2 ft), may suffer from a cancellation in the very low frequency region around the LF cut-off thereby compromising the monitor’s LF extension.
Aufstellungsempfehlung:
Resultierende Frequenzgänge:
Quelle:
http://recording.de/Community/Forum...ik/Raumakustik_und_Dämmung/143389/thread.html
