I had the Xterminator Xt-4000d..I never had any trouble out of it, but as far as rated power it was a little less than what it was advertised..Said 1500watts@1ohm rms, but in real world it is around 1k-1200rms...But it is an awesome amp for the price...I loved it, never once got hot or heated up..I just needed more power so I sold it.. On your 1000d I would expect around 500 watts rms..