I had no problems with this product. It does what it is supposed to do but at less than $15 youre getting what you paid for..
The big issue I had was that it barely pushes the low frequency sound.s. I grew up with Sabbath, etc and the bass performance on this device is abysmal. I have a good receiver and JBL studio monitors. They sound great with CDs etc but using the phono is disappointing.
Spend a little bit more money and get better frequence response.

I own one of these and while I didn't purchase it through Monoprice I have had nothing but problems with it. the biggest issue is a 60 cycle ground hum that is always present you have to ground this unit to something attached to the same circuit in order for it to become less noticeable but is always still present at high volumes. While this is a great idea invest in something of better quality that is AC driven and has its own ground.