I currently have the alpine type-s 6 1/2 coaxial speakers and they are not loud enough for my car, also my deck only puts out 18 rms. So i was thinking of getting a bigger amp for my sub and using the Phoenix gold M25 to power them, it puts out 2x70rms. But the rated wattage for the speakers are 40rms, couldnt i just not turn it up the loudest it could go and be safe. I do plan to get a new component set of speakers that could better use the amp but not yet, can i still use this amp for the speakers if being safe