The product arrived as advertised and worked great

The receiver is good as advertised

Good build qualify

Good build qualify

Sound qualify: Very good, no distortion

Sound qualify: Very good, no distortion

it still give a great performance.

Best performance for a $140 amplify

It costs over $600 for more expensive brands to do amazing job like this

Pros - did its job

Good build qualify

Sound qualify: Very good, no distortion

Solid steel case with convenient handle which also protect the panel various buttons

Tone up/down function works but no good result

Great amplifier, easy setup, out of the box ready to go in minutes.

Three band equalizers work very well

Great sound and plenty of output to meet our needs.

It does not put sound out like a 700 watt amp should.

A must for good quality sound and the price can't be beat.

Secondly, there is a humming sound when volume is low.

In my case, my desktop with 3 prong power was built into my audio system thus formed ground loop with this new amplifier and introduced big AC noise in the beginning

This design has no problem but a risk of ground loop can be built up when you construct your audio system which will introduce significant AC noise

AC noise is my another concern for some low end amplifier from my past experience of building audio amplifier myself