US AMPS

ok ive decide to go with the merlin series d class .its either the md.1d or the md.2d, i here the 1d is overrated and then that it will do exactley what it says it will,then the md.d2 i aint ever heard its under rated .. i heard it could do about 1800 watts @ 1 ohm.how big of a difference are they,is the md.d2 worth several hundered more?,ithan i noticed on here it says the md d1,2 and three all have 30 amp x 3 fuses,that aint true is it?hows it gonna give more power without more amps coming in,the effiencey should be the same since there same series and class

Hi, I am new to this forum and I am looking into upgrading my current system and I was looking at the RE SE12 being powered be either a XT 2000D or a XT 4000D since this site says the XT 2000D only puts out 800 rms at 1 ohm now is that right or is that a typo error and also I am looking at the XT 1600.4 to run my speakers and again it says that at 4 ohm it puts out 125 but the US amps website says 100 rms and is that correct.

i got 2-ax1000des and a ax2000hc has any one did any testing yet would like to jet some # please