Boost Leak, Help meeeee

[Deerbra]

My lil 9n3 gti has recently started having a boost leak, once i reach around 2.5k rpm and it starts getting reasonable boost, the normal sssss turns into a shshshhhh and sounds really flat and looses power. I dont think its the n75, as its not an on/off/on/off whilst boosting its just a constant hiss. Checked vacuum lines to my blow off valve and nothing seems to be wrong.

Any suggestions would be great!!

[h100vw]

Diverter/blow off valve stuck open?
Otherwise, just follow the boost pipes from the turbo and check each connection one at a time until you find the bad one.