I'm all for having new competition on the market, but if you're going to copy an amp, at least copy the good one. It's hard to tell from the pic (still doesn't load when I click on it), but I at least see the notch filter. The DT-40Pro amp today is a well polished quality amp with all the recommended changes that Bill sent to Jian. This is either a copy of an early DT-40Pro set or a copy of the amp for the DT-30's or DT-40Wide. Which isn't bad if it's a copy of one of the newer amps, but I would still prefer the DT-40Pro amp over all else.