help plzzzz Subz Not Hitting hard

[GrandeGrinda]

Ok I have 2 12 Rockford fosgates p3s in a ported box I was running them off a 1000 watt amp and I figured they weren't hitting hard so I upgraded 2. 4000watt power acoustic amp but there still not hittin much harder. I've seen the same speakers hit on YouTube ?

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[Popwarhomie 5,000+ posts]

Crappy amps. Crappy box. Is your box a prefab?

Kinda hard to judge how loud a speaker is by videos on youtube.

 

[GrandeGrinda]

Not sure bought it from a friend . Hmm they told me at the audio place that amp will push em like nothing ,

 

[GrandeGrinda]

Crappy amps. Crappy box. Is your box a prefab?
Kinda hard to judge how loud a speaker is by videos on youtube.

Ya bout they all made the rear view mirror shake I'm not getting that at all lol

 

[C1500martin 10+ year member]

well you have crappy amps no offense but those "4000 watt amps" probably do 500 real watts.

 

[GrandeGrinda]

well you have crappy amps no offense but those "4000 watt amps" probably do 500 real watts.

So u think that's the problem?

 

[C1500martin 10+ year member]

So u think that's the problem?

that and your subwoofer box. is it prefabricated or custom?

 

[mazdakid 5,000+ posts]

Try hooking 1 sub up at a time.

Maybe they're wired out of phase.

 

[GrandeGrinda]

Try hooking 1 sub up at a time.Maybe they're wired out of phase.

Like from inside the box?

 

[The Camry]

Dude its the amp. its a completely **** amp.

 

[sounds_explicit]

Like from inside the box?

no. un hook one subs power and neg from the terminals in back of box. if the other sub gets louder or hits harder its out of phase.

switch the wires around on that sub and wil be louder and hit harder.

if its out of phase youll realize it tho without needing to really pull the wires. it will probably sound like your subs are blown. check your grounds make sure your amp is not grounded to flimsy metal and or metal that is not sanded down to bare metal. check fuse for corrosion as well.

 

[skylineTT 10+ year member]

Like from inside the box?

Either that or at the amp. you need to ensure the positive on each sub goes to a positive on the amp. same with negatives. this will mean that both subwoofers are "in phase" and are moving in the same direction. post a pic of the setup so we can see what you're dealing with. Some cars have loose mirrors or flexible windshields and some don't so shaky mirrors aren't a good indication of how loud something is.

 

[skylineTT 10+ year member]

Another easy way to check the phase is to undo the wires at the amp, get a small battery (AA works fine) and touch the positive wire to the positive (nipple) side, then the negative wire to the negative (flat) side. This should force the subwoofer OUT, like out of the enclosure. if both subs move out, they're in phase. also make sure it's not wired to like 8ohms or something on a 1ohm amp. this will reduce the power by a LOT. set gains accordingly as well.

 

[GrandeGrinda]

https://www.dropbox.com/s/fjfgpllgv2i03uo/IMAG0213.jpg?dl=0

 

[Motokid 10+ year member]

Well of course the guy at the audio shop is going to say the equipment is good. They will also tell you a pair of kicker comps will throw down 150dbs lol.