ok, that last answer totally blew my mind... dual is not a quality brand, and you need a MONO amplifier for subwoofers, not a 4 channel. A 4 channel is ~65% efficient, a mono class D amp is around 80% efficient. most 4 channel amplifiers do not have ...
I'm not really a fan of the MA audio equipment either. What you have to look at too is the ohm rating of the amp. They make that sub in single 4ohm and dual. If you have 3 single 4ohm subs, you are running around 1.3ohms in parallel. If ventilation i...
You really need to know the RMS for the subs. If you don't then you might not provide enough power to the subs to make them work to their full potential or too much and blow the speakers.