Adjust door closer speed?

blackstar

Hello 

I bought a 

https://www.amazon.co.uk/Self-Adhesive-Drilling-Automatic-Punch-Free-Interior/dp/B0CPSPLQQX?ref_=v_sp_product_dpx

However it closes the door far too fast and also slams the door so loudly. How can I adjust the speed it closes the door to a much slower speed?

Thanks all

DullGreyGuy

Looks like a basic thing without a way to adjust speed. Your only way would be to add friction to the door closing or add foam to soften the close if not the speed. 

The £10 ones, rather than £4, are adjustable to change tension to match the weight of the door

grumpy_codger

You can try adjusting the speed by changing position of the point where the cable if fixed to the door (and position of the box with the spring if needed). The closer the point is to the hinge, the smaller the torque that the device creates to close the door.