i got the sae 1200 off ebay it broke. so i sent it to db-r they was backed up and jacob asked me if i would want to pay 150 for the upgrade so i did was going play it at .5 ohm but my volts droped to low with a 200 amp alt and deepcell in the back so im getting somthing 2 ohm stable as my btl is a dual 1 ohm sublooks to be straight from Jacob /....