Amplifier quiet gain all the way up (I wouldnt ask if I wasnt stumped/already looked.)

[SPL.Pantie.Soak]

I have a Skar LP 1000.1D, I have used three different headunits on the amplifier and regardess of what try the amplifier is putting out around 65% of what it is capable of. The gain is all the way up and still sounds clean, it seems as if I need to be able to turn the gain even higher to have it where I need it. I opened the amp today to ensure nothing seemed burnt and everything looks alright. I messed with all other settings to no avail. I am completely stumped- A reply would be much appreciated. Checked fuses and grounds as well. 

[06RTCharger]

You sure ur sub is wired to 1ohm? 

[SnowDrifter]

What's your output voltage?

Verified both RCAs have good connections?

[SPL.Pantie.Soak]

Both RCAs have solid connections, the headunit is rated @ 2 volts. I wired my AQ 3500.1 to 4 ohms with decent results but still having the same issue (gain is maxed). I will wire up my line output converter and attempt to strengthen the signal from the HU. I will report back with results tomorrow. 

[Jessica]

check you filters or crossover points as some would call them

[SoCaLBaMF]

13 minutes ago, SPL.Pantie.Soak said:

the headunit is rated @ 2 volts.

Thats what its rated at, but its probably not putting out 2v. 

[06RTCharger]

3 hours ago, SPL.Pantie.Soak said:

Both RCAs have solid connections, the headunit is rated @ 2 volts. I wired my AQ 3500.1 to 4 ohms with decent results but still having the same issue (gain is maxed). I will wire up my line output converter and attempt to strengthen the signal from the HU. I will report back with results tomorrow. 

Nice amp upgrade. What subs are u running? At 4ohm ur amp is rated to put out 1400w, is 1400w enough for ur subs?

also im assuming the amps 1400 rating is based on 14.4volts, so does ur electrical have the ability to supply that amp with 14 volts? If ur voltage is dropping low from the amp then its output will deminish. That amp needs a 400amp fuse, thats some pretty big draw. 

[ShadeTreeMechanic]

20 hours ago, SPL.Pantie.Soak said:

Both RCAs have solid connections, the headunit is rated @ 2 volts. I wired my AQ 3500.1 to 4 ohms with decent results but still having the same issue (gain is maxed). I will wire up my line output converter and attempt to strengthen the signal from the HU. I will report back with results tomorrow. 

Why do you have it wired to 4 ohms? That's where all your power went.

[hdorre]

On 3/23/2017 at 11:23 PM, SoCaLBaMF said:

Thats what its rated at, but its probably not putting out 2v. 

This. Test RCA voltage with a DMM.