Disappointed that the measurements given on the web site are misleading. I thought it would fit under the wall unit and slightly behind the pelmet. However the measurements given from front to back are for the chassis only. There is another 20mm of facia. This meant I had to cut out part of the pelmet and screw straight to the base of the wall unit and not use the spacers provided. So the bolts supplied are too long. Even after carefully cutting the bolts down I was foiled in the fact that the bolts aren't threaded all the way up. Luckily I had some bolts that fitted. However the sound quality is very good, and has brought some life into the kitchen.