Q: Beats Studio Wireless volume is low!

You don't indicate the device you are using the Beats with  ,simple solution is take them to an Apple Store and discuss withe the genius bar staff to find out if your set have an issue or it is the source device

Hi i know its been nearly 2 months but have you still got the headphones and did you find a solution i have been having the same problem and have figured out how to fix it.

Hi! I'm having same problem, could you please tell how you fixed this issue with volume?.

HHey yeh no worries.

What worked for me was putting the headphone cable in the headset and iPod/iPhone and then increase the volume While playing a track then reconnect it via Bluetooth and it seemed a lot louder to me

We had the same kind of issue with a different type of bluetooth speaker.  We had to reestablish the connection by going into Settings>Bluetooth, selecting the device and selecting "Forget this device" and then re-finding the device.  No idea why it happened, but this resolved the issue.