back in the old days, MTX is one of the best brand (pioneers btw) for car audio.
these days, kinda considered chicken brand lol. (sifus do correct me if i am mistaken)

can also refer: http://en.wikipedia.org/wiki/MTX_Audio

as for genuine or not, i cant tell just from the pictures, dont seem to have distributor stickers also.
as a general rule of thumb: if it's too good to be true, it probably is