UNIC UC50 vs Laptop

Hi I would like to know how i can get the volume higher. in the video you can see the following: 1. Sound is very very low without power at 100% 2. Sound is the same with power at 100% 3.Sound is a little louder with speaker but STILL very low at 100% 4. Sound on my laptop is louder than UNIC UC50 at 30% , laptop30% louder than UNIC100% 5.Sound on my laptop with Speaker is perfectly loud and normal and not even full volume, only 20~30% Thank you