I opened it (carefully) to see if I could not help it, I'm an electronics training.
I was startled to see the poor quality workmanship, I've never seen him so rotten in my life, I make pictures for the one interested.
I was also shocked to see the arch basic design of the amplification, the real low end "first price", while the selling price is in the upper basket.
I can not estimate the "normal" operation because I have not had the chance to see it work, but I can assure that this is material "basic", very poorly assembled, and sold under the "professional" label .
