I have a problem with subs not hitting lows.

[CSA]

My subs don't hit lows and its because of the amp I have, is there any way to fix it without getting new amps?

(I found out it was my amps by borrowing a different amp and using that on my subs and then they hit lows just fine)

The amps that I am using is a old school hifonics centurion X's which I have two of. (I had three at one point but they all had this problem)

Thanks for your help

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[wew lad 5,000+ posts]

If you can't adjust the hpf(ssf) below 30hz or the amp rolls off you can possibly spend money getting the preamp modified but it might be cheaper to simply get a new amp

 

[CSA]

How would I modify the preamp? Its all through hole components. Hpf only goes down to 60hz on the dial if I remember correctly. Lpf goes downtown o 30hz

Here is a pictures of the internals of the amp

 

[n2audio 5,000+ posts]

Where do you have the adjustment set at?

 

[CSA]

Hpf is at 150hz I'm pretty sure and lpf is at 80hz

 

[Jeffdachef 5,000+ posts]

Hpf is at 150hz I'm pretty sure and lpf is at 80hz

you need to turn off high pass completely there should be a switch that says HI, Flat and Low. Keep it to the right at LOW which means only the low pass filter is working.

 

[CSA]

Yeah high pass is off completely its switched to low. I was just mentioning what was on the dials

 

[Kenyanbasshead]

Sounds to me that u answered your own question. Sell your amp as those amps dont allow you to play lower notes/freq.

 

[n2audio 5,000+ posts]

So the switch is set to low. The sub dial is set at ~80 (11-12 o'clock).

What about level and boost?

I'm guessing you've messed with those, but I'm just curious.

What HU btw?

 

[CSA]

Boost is Max

Level is around 50%

Hu is jvc kd-r310

Yeah the dial is around 11oclock 80hz lpf

 

[Jeffdachef 5,000+ posts]

Boost is MaxLevel is around 50%

Hu is jvc kd-r310

Yeah the dial is around 11oclock 80hz lpf

bass boost should never be used ever.

your gains is high as well.

You need to go up to 80% of the head unit's max volume

subwoofer level maxed out on the head unit

bass boost and loudness off on the head unit Bass EQ flat zero

bass boost off on the amp. then reset your gains again.

i'm surprised you havent blown anything with those amp settings.

 

[Hertz Mafia]

Boost is MaxLevel is around 50%

Hu is jvc kd-r310

Yeah the dial is around 11oclock 80hz lpf

Bass boost won't let you play low... it's boosting the signal at 40hz when your trying to pay 25hz or whatever

 

[Papermaker85 5,000+ posts]

Bass boost won't let you play low... it's boosting the signal at 40hz when your trying to pay 25hz or whatever

no.. that's like saying a EQ wont let you play anything under what you are EQing.. lol

 

[Jeffdachef 5,000+ posts]

no.. that's like saying a EQ wont let you play anything under what you are EQing.. lol

a more correct statement that its forcing the amp to focus all the power on to those frequencies and makes the sound soo peaky and distorted that you dont hear any other frequencies.

 

[Hertz Mafia]

no.. that's like saying a EQ wont let you play anything under what you are EQing.. lol

Go crank your bass boost to the max and play 20hz and tell me if it sounds correct... no it will sound like crap