Brand new subs, clipping?

Find the root of the problem in what you did when you put in that second amp.

AS to what forbidden said. this is my second pair.. first pair the one sub blew then a week later the other sub blew..they played fine for about 6 months never had a problem now all of a sudden i get two brand new ones put them in and now its cutting off. Same subs same amp as before but before they never cut out they played and played and played and then they blew out. I haven't change MY perference since i first got them.. the only thing that changed was the subs. And I told the guy that the amp is going into protection mode and thats when we did each sub individually and found that one sub cut out at that volume.. Was never that high before so In other words the subs work fine (for me) when they are seperated.. Does that make sense? the sub that cut out was at volume 46 of 50 and i will never have it that high and when its that high im sure something bad will happen so even 40 is good for me and it wasnt cutting there  . but once we put both subs on thats when it started to cut again.

Dam man you guys know a whoooole lot. Im not trying to play no it all cause trust me i kno sh*t  thanx again for everyone's help so fair.....GREATLY Apprecaited...now back to business.

Forbiden has a great way to explain clipping, but I have to stick my arrogant head in here and correct one thing.

Clipping, or the 'red-line' of audio is not invisible. With an Oscilloscope (Like a DMM, but a little more advanced) a clipped waveform becomes fairly obvious to the eye. Say your amplifier output is cabable of a 24 volt Peak to Peak signal (highest positive voltage to lowest negative voltage) and the signal fed to the amp or reproduced by the amp ends up being 25 volts at the output, this will start to sound like crap, 30 volts...and this is really getting muddy, 50 volts......horrible, consider this a DC duty cycle or anything but audio...because it sure won't sound much like music.

Without the luxury of an Oscilloscope, it is pretty much invisible, but still very audible.

If you would like to see an audio wave from similar to what I'm talking about, go to Windows Media player, "now playing options", Visualizations, Bars and waves, Scope.....this is an Oscilloscope as far as I'm concerned. You can clearly see clipped signals, you can also adjust the equalizers to prevent the clipping. If it's a clipped recording, delete it or don't play it on your good stereo.