im not sure exactly what transistors they use, but im still doubting 6kw.. its a 2400 watt board.. i could see a 4..5kw for a few seconds.. your going to fry that amp.. caps simply store energy/and or act as a filter... it simply pulls more current to stablize voltage in short output stages. your reading a huge spike... if you look at the link i posted the output supply is clearly limited to around 2700 watts.. for a couple of seconds with 14.4 clipped to shit there capible of doing 4.5k but your not going to get that for more than a second of so.. your meter isn't capible of reading **** peaks and dips.. there way to transiant... you can argure all day but fact of the matter is the amp is simply what DD states its a 2400 watts RMS amp @1ohm 14.4 volts.. like i said i can get over 2500 out of my RD 1750 with 14 volts its rated for 1750@14,4.. of course these amps are built for lower voltages.. IE one design is a contunious steady output were one is a very dynamic output... the OP asked what is better i told him the dat SD or mmats is designed exactly for his application.. again you said you used the mmats and its not as strong.. its probably because you need to make adjustments your impedance load isn't idea etc,, the mmats 3000 is superior to the m3 in output... the older 3500 where abit overrated but the new 300 does right @ 3200 @14.4