I recently had my subwoofer (ID12 D2V3) installed with a box from double 07, powered by a p1000.1 amp at 1ohm. I usually listen to my stereo at volume of 10, so I had the gain set fairly high (~75%). I have a knob under my steering wheel to control my bass so I can adjust it on the fly. Anyway, after about 20 hours of use (about 5 weeks) I noticed some popping every now and then, and much more frequently now. Sometimes I notice a smell like burning rubber. Am I having these issues because of the gain? If so, why would they start 20 hours into usage (and does this mean I've caused irreparable damage)? If it is due to the gain, how far should I turn it down (keeping in mind how low I usually keep the volume of my stereo, would I hear the sub at a lower gain at low volumes)?
If it isn't the gain, what else could be causing the popping noise and burning rubber smell?