I just bought my first Amp today. In the manual it says to have at least 8 inches of space on the sides and 12 at the top. Is that much space really necessary? I have my amp in a wooden cabinet, with 1.6 inches of space on the sides. The front is open and 1/4 of the rear is open. On the top I have 3.5 inches. I could remove one shelf from the cabinet an increase the top space to about 7 inches. Is there any danger for my amp if I don't remove the shelf?