High quality Inline fan or Cheap inline fan with a duct muffler? Least Noise?

Makes me want to get into the carbon filtration business. Based on what I've read about different activated carbons, simply exchanging their coal carbon for coconut carbon would increase adsorption by 10%. Assuming they're using the optimal particle size, which I imagine they are. I'm sure it's a cost thing, since coal is cheaper, and obviously works fine. The Phresh Filters really do look kick ass

Can't go wrong with a Phresh Filter. I bought one after making the mistake of getting a cheap HTG filter. Took away all the odor immediately.

Okay cool Thanks for the input guys, i didn't see any responses so i just bought a hydrofarm inline with a variable speed controller, and it looks like i did the right thing. Dam i woulda been pissed if i had bought the cheap muffler and then seen all the negative input about it. Now i have another question. My A/C unit is over 20 years old and sucks major donkey dick. It costs an arm and a leg to keep it running, so i have to be happy with what little a/c i get. My 4x4 tent gets to temps from 79-85, depending on the time of the day. This is the temp from 4 inches off the light, which is where i keep my canopy. I will soon be switching from veg to flower, from my 400w mh to my 600w super hps, and I feel that the temps will be rising some more. Now i don't really have any kind of exhaust fan except for the inline sucking straight from the light, which is just sucking from the inside of the tent. I do have a little plate which is mounted up in the top corner of the tent and i believe it is for mounting a small fan to. I have 2 8 inch honeywell fans, a 16" oscilating fan, a big box fan, and another oscilating fan, any ideas on exhaust, or just general air movement? Its my first time in a tent, i have always been an open closet grower so i am new to the confined space.