I have a board that I believe to be equal to the new Audiopipe AP1800 model... as it is built just like the AP1500 but with two extra output FETs - I tested it vs. the SAE-1200D... I see ALOT of folks buying this Audiopipe amps so figured I'd do this test : For the sake of this test I just turned everything wide open just to see when they quit making power. THD was not a factor at all, just wide open. Obviously this is not the ideal situation -- I may send them to Chris so he can use some of his equipment to do a test using a scope as well. The amps are fed with a 4 awg and 8 awg wire in parallel reduced to 8 awg so it will fit both amps (the 1800 won't fit our 4 awg lead directly as it is tinned). Test load consists of two Nightshade 12s wire to 1 ohm and the tone is 60 Hz. ----- * SAE-1200D on the bench http://www.sundownaudio.com/misc/1800-watt...0D/CIMG2617.MOV * Power Test http://www.sundownaudio.com/misc/1800-watt...0D/CIMG2618.MOV * Output Voltage Test 1730 watts 59 V 29.3 A (calculated) 2.01 ohms (calculated) 12.68v power supply ----- 12x Power Supply Fets 10x Output FETs (AP1500 has 8) The two caps = a little more capacity than the four in the AP1500D. These are 4700 each and the AP1500D has 4x 2200. * 1800-watt on the bench http://www.sundownaudio.com/misc/1800-watt...0D/CIMG2621.MOV * Power Test http://www.sundownaudio.com/misc/1800-watt...0D/CIMG2622.MOV * Output Voltage Test 1440 watts 57.1 V 25.21 A (calculated) 2.2 ohms (calculated) 13.1v power supply ----- SAE-1200D produced ~20% more power... and this 1800 has an extra 2 output FETs above the AP1500D. An SPL test may be more revealing... I may see if the 1800 will stay on in the Jeep at 1/2 nominal -- my rise is to just above 1 ohm.