USB Microphone too Quiet [duplicate]

There isn't much more you can do than what you have tried. Just sit close enough and talk a bit louder, then compare your voice to popular podcasts to see how quiet you really sound. Try to boost your voice up with an application and remove any noise at the same time, compare the volume again and check if the quality is still fine.

Alas, if you bought the Snowflake (for around USD 60) the only thing "professional" about it is the word "professional" on the box. This is just a mediocre condenser mic with high-end marketing. Computer shops are lousy places to buy mics, even your local head-banger guitar shop will provide real gear for only slightly more ducats.

Headsets and lavaliers have the great advantage of being very close to the source therefore receive high sound-pressure so need very little current. Move the mic away from you and the pressure decreases reciprocally. This means that you need higher sensitivity which usually means more bias current. I've yet to see a decent voice mic that works well at half a meter without being driven by something more than a USB port.

Yes, external gear is far less convenient than plugging into a USB, but if you need a mic that isn't centimeters from your mouth, you can't fight the physics.

For people who still have this problem, I think I found a fix earlier today which I wrote about on my half-disused blog here: http://goo.gl/XvU1eC

It's a frustrating issue, but don't give up and buy a new mic until you try this. In essence, the problem is that the USB device is using the wrong driver (mine showed up as a C-media device) but by using 'Update Driver' in the device properties and manually picking USB Audio Device driver from a list, after a reboot, the microphone functioned at a desired level (going louder than I even needed).

The blog post has more direct instructions if you need it.