Low Audio From DVD

i havent used my indash dvd for a while but i used it last night and the audio is comin gout very low i have to put the volume on the indash tv all the way up and its still not that low.. what can it be , can the dvd player be messed up, it wasnt a very good one it was the first one i got when i bought the alpine tv. i t is a pyle i think never really liked it but... i was looking at the pioneer or the clarion indash dvd players i think i want the pioneer sdv-p7 what you guys think of that. please let me know whatever you can thanks

Make sure all of your connections are secure and that your grounds are good. The pioneer dvd player you listed sounds fine. You could always save money and go with a good outboard one like the Blaupunkt DVD-me2.