A reader recently wrote it to me with this dilemma. Tommy writes:
Hello, I’ve been searching the internet for answers why my subwoofers problem. I have been running this set up i bought from this website for one year.(http://www.crutchfield.com/p_700MRPEBB/Alpine-500-watt-Dual-12-Bass-Package.html?tp=442). Now, for the past 3 months, these subwoofers havent been hitting hard as they use to. I agjusted the gain higher than normal and it still doesnt have the deep bass it use to have so i return the gain to normal. Im so fustrated right now becuase I dont know whats the problem. Also, I drive a 2007 honda civic sedan and when i play my songs for an hour, is it normal for my mono amp to feel kind of hot or warm. I placed the amp in my trunk on top of the subwoofer box. Is that a good location? I dont want to bring it to a shop becuase i dont have the money to do so =(. I NEED HELP ASAP PLS!!!!
Well Tommy, I did make a video reply for you. Real quick tip 1st: it is normal for amps to feel warm after long periods of playing, but mono amps shouldn’t ever get scald your skin hot. If they do, your sub may be bad or going bad and giving the amp too low off a resistance, causing it to overheat. Also a bad ground can cause overheating too. I hope this video answer helps, if not let me know!
Hey, Thanks for the info. I did everything you told me and everything seem fine. Now I just need to buy a multimeter. I found this multimeter online for like 5 bucks, would that be fine to test the subs?
One more thought I had earlier today, you said you’re running a stock head unit, right? Have you tried adjusting your line output converter? Many of them have adjustment dials for adjusting output for each channel. I’m just wondering is they got tweaked or if your line output converter got screwed up somehow. And I don’t think that’s a good multimeter, I know that Fluke is a decent one. It looks like the resistance range is not what you need. I’d just go to home depot or an autozone or even a Sears and pick one up.