Help! Sub isn't hitting hard enough

[Joncar]

I drive a 2013 Camaro and I picked up a Mojo 12" dual 4 ohm sub and a Memphis prx1.1500 amp yesterday to replace my Rockford Fosgate R1's and Fosgate 500 watt monoblock amp. I was using a cheap PAC line out converter with my old set up and it actually worked flawlessly for 6 months (and they still did when I pulled them out.)

So I grabbed a new Scosche line out converter and hooked it all up. I used 4 gauge wire for my power and ground. I connected the converter to one of my rear 6x9's (positive and negative) and ran the remote wire to my cigarette lighter in my console which is the same way I had it before. The subwoofer is bridged properly, my amp is powered and grounded, my sub is receiving a signal, but it's just hitting extremely weak. I heard it in my brothers car and it hit extremely hard. What could be wrong???? And also, I picked up the sub/box/amp for $200. Good deal?

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[Papermaker85 5,000+ posts]

gains are set? subs wired correctly?

 

[Joncar]

My amp has zero adjustments. There is no way to adjust anything on it. And yes, the subs are wired correctly. This has really stumped me

 

[Joncar]

I cannot adjust the amp, and the subs are wired correctly. I'm so confused

 

[dev199505]

Pics?

Sent from my LGMS330 using Tapatalk

 

[Joncar]

What would you like a picture of specifically? I kind of have it all over the place right now trying to identify the problem

 

[The_Quiet_One 10+ year member]

Your amp should definitely have a gain knob and according to Memphis's site subsonic and crossover as well.

 

[Joncar]

 

[Joncar]

No knobs /:

 

[Papermaker85 5,000+ posts]

it has to have a gain. unless it reads input and output adjust its according.

 

[The_Quiet_One 10+ year member]

I don't know what to tell you man. I can't find the manual for that model. I would personally take the top cover off and double check it's not a false cover to give a cleaner look for installs. The 500 has the settings on the top. Your amp will at least have a gain if not additional xovers

 

[The_Quiet_One 10+ year member]

it has to have a gain. unless it reads input and output adjust its according.

How would it deal with volume change then?

 

[Louisiana_CRX 5,000+ posts]

Are there any adjustments on the bottom of the amp ?

 

[Papermaker85 5,000+ posts]

remove the cover set the gain and crossover

 

[Louisiana_CRX 5,000+ posts]

I read the amp has a removable cover so the controls are most likely under the cover