Armoire 300w Stealth Grow Cabinet

That's a boss fan.

I just got all my shit from ebay and finished setting up the ventilation in my dresser grow box... The exhaust ducting is pretty noisy where the air comes out. Does your exhaust duct make noticable sound? I'm using 4" 172cfm inline... carbon filter > cool tube > fan > exhaust duct. It's obvious I'm going to need a muffler... tried stuffing some panties in the end but they shot out like a potato gun haha.