Ultimate amps?

im asking for my bro, he has the same subs as me in his bmw. They are powered by a small mtx 4250d but they get surprisingly loud. Hes just wants to know if the ultimate is more powerful than the mtx.

 
heres a couple pics of the box

DSC01034.jpg


DSC01033.jpg


 
From a Google search-

Third, the regulated Ultimate Sound US2125 (this amp is regulated, but obviously not as tightly as the other 2)

Power output at 12.5 volts into 4 ohms = 129 watts per channel

Power output at 14.4 volts into 4 ohms = 138 watts per channel

Power output at 12.5 volts into 2 ohms = 197 watts per channel

Power output at 12.5 volts bridged into 4 ohms = 394 watts

http://209.85.141.104/search?q=cache:H3djQyY0Hg8J:www.diymobileaudio.com/forum/showthread.php%3Ft%3D31734+Ultimate+US2125&hl=en&ct=clnk&cd=1&gl=us

(DIY is offline getting new servers up. The Google cache was the only version I could find.)

 
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