Operation confirmed. Even though it's a clone, the penetrating power and the clear, crisp sound that is released are overwhelming. I thought it was a faithful yet flavorful sound. The 300A has a high damping factor and good speaker control, yet it has excellent resolution in the mid and high frequencies, accurate expressiveness, and a good balance of bass and treble. This unit has no noticeable noise, so you can use it with confidence. If no sound is produced, we will accept returns within 3 days of arrival.