You should have at least 7 " of space in between shelves. You can place the amp on either the middle or bottom shelf. Place footers(I suggest cost effective Isoblocks) under the amp 1" in from the edge/ back of the shelf and let the 4.5" (20%) of the amp canterliver over the edge. There is enough weight - (the transformers are in the front of the unit, heaviest part) in the 17.5" (80%) of the unit that is directly supported by the shelf to keep it stable. I reccomend the bottom shelf to get the most separation.
Additionally I would bring your speakers forward toward your listening postion to get even more separation and better overall sonic presentaion. I also agree with those who suggest taking abother look at your cabling and investing in an upgrade if neccessary.
https://shop.mapleshadestore.com/Mapleshade-Isoblock-Sets_p_1224.html
In general I don’t think glass is a good option for shelveing, here is another option to check out if you are looking to invest in a isolation solution.
https://audiophilevibrationcontrol.com/
Best Of Luck
Additionally I would bring your speakers forward toward your listening postion to get even more separation and better overall sonic presentaion. I also agree with those who suggest taking abother look at your cabling and investing in an upgrade if neccessary.
https://shop.mapleshadestore.com/Mapleshade-Isoblock-Sets_p_1224.html
In general I don’t think glass is a good option for shelveing, here is another option to check out if you are looking to invest in a isolation solution.
https://audiophilevibrationcontrol.com/
Best Of Luck