Plugable 4.0 LE Causes Low Volume in Headphones

Plugable 4.0 LE causes low volume in Bose QuietComfort 35 headphones on Windows 7 laptop. Volume is at max through Volume Mixer and Pandora. How do I increase the volume?

Figured it out. The headphones have a volume control that is not associated with widows volume mixer or pandora volume, on the side of the headset.