Amp/sub cutting out at high volume

[AndrewBird]

my amp
http://www.sonicelectronix.com/item_...M-GTX6040.html

my sub

http://www.crutchfield.com/S-csqWUoJOytl/p_500SWR1242/Alpine-SWR-1242D.html?XVINQ=DST&XVVER=GRP

DVC 4 Ohm.

im gonna attempt to follow a youtube video to tune this thing and see what happens lol


Edit:

I attempted to follow a youtube amp tuning guide but now im confused.

this was the guide http://www.youtube.com/watch?v=RpE6QQi--Lg

I used http://www.sengpielaudio.com/calculator-ohm.htm

to calculate what voltage I needed I used 300W and 4ohm (my amps bridged max rating) to get 34.64 v

however with the gain all the way up it only makes 16.5V car off and 20.5V running.

is this a sign I need to use bigger wires? help lol

300 watts is the max power of the amp. You want to use RMS power, or slightly less.

I've never used this method for setting an amp's gain, so maybe I'm wrong about this, but it seems like a very odd way of doing it. At least, the way the guy explains how to do it. For one, the ohm rating on a speaker is not it's resistance, it is its impedance. I don't know enough to know whether this matters in this case or not, but it seems like it does.

On top of that, he says that a head unit will clip at anything above 3/4 volume, which is probably about true if you are using line-level outputs, but if you have an amp, you should be using pre-amp outputs.

I suggest you try this simpler method explained by Luke. It worked great for me.

http://www.r3vlimited.com/board/showthread.php?t=285119

[UpstateMike]

I've never run an amp above 2/3 gain. Any higher than that I've always found distortion. Better brand amps can be run above this level but is it really necessary?

[SmokeE30]

I tried messing with the settings and managed to make it sound better but it still cuts power to the sub if I turn it up too much. I will have to check over how the headunit is wired, I simply made the existing connections more solid I did not actually confirm if it was wired correctly, one i get some time I will sit down and wire it up using the etm and the headunits diagram. Once that is confirmed good then ill have somebody more versed in stereo stuff take a look at it. The sound is pretty decent as is but once cruising at speed with the windows down the I have to either deal with having it at level 25 with bass or turn it up and listen to stock speakers :(

[StereoInstaller1]

The only real issue you have is amplifier incompatibility.

You have a DVC woofer that is 4 ohms/coil. It is just not logical to use that amp on a single DVC woofer. it can be done properly, but it is sill illogical.

You can wire each half of that amp to each coil and that will fix the issue, but that would be a "work around". What you really should consider is getting an amp that will make around 300 watts on a 2 ohm load, like this: http://www.amazon.com/Audio-Jx500-Mo.../dp/B0081K3M5G (only an example, there are literally hundreds of choices)...then you can use the 4 channel Sony to run your mids and highs to they will sound better.