headphone problem

I have a pair of akg k240 s headphones, good stuff...when I bought them. I left them in a hot car and am not sure if the low end has dropped out of them because of this or not...any way to tell? I mixed something with these recently and it sounds WAY off from what I hear on the AKG k44 headphones. Are they that different? The k44's sound deeper...should they? Basically I need to know if my babies are trash.

------------------ I moved this to the hardware forum ----------------------