Hello Everyone,

I am sorry to revive an old thread but I am having the same exact problem with the MRD-M1005. I was wondering if there was any conclusion to the cause of the problem??

Here is a little information about my specific situation. It is pretty much exactly the same. The sub would cut out at lower volumes, and would come in full when I turn the volume up. If I turn the volume up for about 2-5 minutes then the sub will sometimes play at lower volumes. This problem came on gradually and progressively got worse. It got to the point where it was cutting in and out at higher volumes with audible distortion. Seeing as how the warranty had expired I decided to take the amp apart and take a look.

When I dissected the amp I noticed no visual damage. To be honest I really don't know very much about the intricate details of an amp. I did notice, however, that the two fans had come loose and were freely laying on the circuit board. I couldn't tell if it had been shorting anything or not. I snapped the fans back in place and reassembled the amp. To my surprise when I powered it back up it worked PERFECTLY. The bass was noticeably more accurate and would play at low volumes with ease. I was excited until about a week later when the problem slowly started coming back again.

I haven't had the chance to take the amp apart again and see if the fans have fallen loose again. I really don't understand what the problem is and I personally feel its the amp and not the sub, but I could be wrong.

Any help is appreciated. Thank you all in advance.

 

Bump

Problem still ongoing. Getting even worse now to the point of where I have disconnected the amp from my source. Anyone have any suggestions? Thanks!

 

I have a bit of a feeling that it may be the subs. Have you pushed on the cones in both directions, feeling and listening for any friction or drag? I'm wondering if one, or both voice coils are f^(&@d. It may take more power to get them to react, and over time it may be slowly getting worse. This could also explain the distortion as well.
Check out your subs, and when you puch on them, do it slowly, paying close attention.

 

Check your input ports to your sub box, I had the same problem recently and it turned out that the negative terminal on my box had burnt a hole thus resulting in my negative not making a pure connection. You may need to change your input port.