You'd need your "rain-brow" to be solid, otherwise you'll simply be moving the sound-box from it's current location below the window, to a new position above it.
Although a sharp angle might convert the vertical path to a horizontal trajectory with minimum "splat", as it were.
Easy enough to trial this with two brackets and a simple length of wood- I have plenty of wood that could be used for this experiment if you wanted to pop over the road.
You'd need your "rain-brow" to be solid, otherwise you'll simply be moving the sound-box from it's current location below the window, to a new position above it.
Although a sharp angle might convert the vertical path to a horizontal trajectory with minimum "splat", as it were.
Easy enough to trial this with two brackets and a simple length of wood- I have plenty of wood that could be used for this experiment if you wanted to pop over the road.