I'm having issues with low subwoofer output

[dragon.breath 10+ year member]

That sounds correct. If you were truly at a 1 ohm load, 38.2 v would be over 1400 watts. But with impedance rise of 2x or 3x that voltage is completely normal.
How low is the volume? Maybe you are expecting to much from a single 10.

 

[Jacob Pierznik]

That sounds correct. If you were truly at a 1 ohm load, 38.2 v would be over 1400 watts. But with impedance rise of 2x or 3x that voltage is completely normal.
How low is the volume? Maybe you are expecting to much from a single 10.

It's enough to visually see the rear view get blurry but it doesn't shake that much unless I'm playing like a 40hz test tone and I'm playing the music at the highest I would play it at which is 27 out of 40. I did put my 2x12s back in and they're better but it's the same thing with the 10 where I need to play it at max volume to get a lot out of them.

 

[SbassLaser]

That sounds pretty high to me. At a perfect 1 ohm load, that would be over 1400 watts. With impedance rise, you won't be getting quite that much power but it still sounds too high for that amp. At 2 ohms that would be over 700 watts while your amp is rated for 600 watts at 2 ohms w/ 14.4V supply. At a lower voltage it will be capable of even less.
I'd bet you're clipping it. When the amp starts clipping your efficiency drops and the amp pulls a lot more current, which will cause your voltage to drop.
If that's what's happening, the only solution to this is to keep the volume lower or turn the gain down on the amp. Unfortunately that's not going to help your low output issue.
Regarding the low output, does it sound significantly different from when it was first installed? I ask because, in my opinion, a single 10 inch sub with that amount of power isn't going to produce very much bass to begin with.

 

[Jacob Pierznik]

That sounds pretty high to me. At a perfect 1 ohm load, that would be over 1400 watts. With impedance rise, you won't be getting quite that much power but it still sounds too high for that amp. At 2 ohms that would be over 700 watts while your amp is rated for 600 watts at 2 ohms w/ 14.4V supply. At a lower voltage it will be capable of even less.
I'd bet you're clipping it. When the amp starts clipping your efficiency drops and the amp pulls a lot more current, which will cause your voltage to drop.
If that's what's happening, the only solution to this is to keep the volume lower or turn the gain down on the amp. Unfortunately that's not going to help your low output issue.
Regarding the low output, does it sound significantly different from when it was first installed? I ask because, in my opinion, a single 10 inch sub with that amount of power isn't going to produce very much bass to begin with.

So I've always in the past ran settings up high or gain up to where I was clipping and just breaking subs so I could get input and that's why I finally got the headunit because I was over running it like that. I just used an oscilloscope today to set the gains correctly and I get a decent amount more output then I would've got with the old headunit on the correct settings, but it still feels like it lacks a decent amount. My goal is to be able to feel the bass in the seat like I did with the wrong settings, but just on the right settings. When I got the first svx10 I got it from a guy that did audio installs and he showed me his with the same exact sub just on an 1000watt amp and his had significantly better output. Now he did have a 99-04 mustang and I have a sedan so I'm sure that makes a difference and I have no idea if an extra 200watts would be enough to increase the volume that much.

My interior lights do dim a bit on max volume and the power light on the amp does too, but I've gotten mixed answers about the voltage drop I'm experiencing some say that dropping more than 0.5v is bad and others saying dropping down the 1v or more I am seeing is fine and I shouldn't hear a difference in output, so I have no idea what is right. I also don't know if it's just me and I don't strong enough amp for what I want or if I have another issue.

 

[SbassLaser]

Well you definitely did the right thing getting an o-scope to set your gain with. Different cars do sound different even with the same equipment. The shape and size of the cabin will determine how the sound waves interact with each other, and whether or not those interactions are positive or negative.
Since you have a sedan, do you have the backseat open to let the bass out of the trunk? I always used to keep my backseats down when I had a trunk system.
And I assume you've confirmed that you're wired at one ohm with a multimeter?

 

[Jacob Pierznik]

Well you definitely did the right thing getting an o-scope to set your gain with. Different cars do sound different even with the same equipment. The shape and size of the cabin will determine how the sound waves interact with each other, and whether or not those interactions are positive or negative.
Since you have a sedan, do you have the backseat open to let the bass out of the trunk? I always used to keep my backseats down when I had a trunk system.
And I assume you've confirmed that you're wired at one ohm with a multimeter?

I don't have the backseat open to the trunk and I could do it, but I want to be able to do it with them up cause I do have passengers pretty often. I have confirmed that I have it wired to 1 ohm. Also is it possible that I'm just expecting too much out of what I have?

 

[SbassLaser]

I mean that's definitely possible. I know I would want more if all I had was single 10 in my trunk lol
Have you tried putting the back seat down just to see how much louder it gets?