Subwoofers not loud as they should be?

[Russosaur 10+ year member]

So I just installed my system in my car today with 2 12" MTX Terminators in a sealed box, and a Kenwood KAC-8105D amp, and a Kenwood KDC-252U Headunit (had it pro installed). So I play a good song and they don't seem to be that loud. Like I have to turn my volume up to like 30/35 to get my subs to move and have good bass in the car. I already have the gain set at halfway which is between the 2v and 1v mark on the amp (Bass boost is set a 0), do I need to turn it up more or possibly use bass boost? I also really haven't setup my headunit properly (I did set the RCA's as sub out) yet but I don't believe that's the reason why. Any Opinions?

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[mitchellc123 10+ year member]

Turn the bass booster down on your deck and turn the amp gain up on your deck it should be under like subwoofer 2 or it'll say amp gain...and also turn up SLA

 

[Full Tilt 10+ year member]

Go ported?

 

[LosIsATool 5,000+ posts]

What are you expecting from them?

 

[Russosaur 10+ year member]

What are you expecting from them?

I was expecting them to move more, and be louder. They don't really move that much even at almost max volume, if I can't figure out the problem (if their is one) I'm just going to drive back to the audio place and see what they can do.