nvx jad800.4

I have the nvx jad 800 4 channel amp: 4 ohms: 125 watts x 4 chan 2 ohms: 200 watts x 4 chan Bridged, 4 ohms: 400 x 2 chan I have a pair of Alpine components: Peak Power: 330W RMS Power: 110W 4 Ohms Impedance I have a Pioneer DEH-x6900BT head unit: front, rear and sub preouts Questions...

Ok so I bought this amplifier about 3 weeks ago and have already fried two speakers both on the passenger side door. The first speakers, pioneer d series comps fried so I bought the image dynamics cxs62 v2's. and one of those in the same location. There is no audible distortion when I play them...