Missing info for A/D/S Sub

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Hello,
I purchased a used A/D/S MS3 after it was recommended to me as a phenomenal subwoofer, but upon listening it didn’t have the rumble that I had expected. I didn’t think too much of it as the sub was definitely smooth. Fast forward a few months, one day I noticed the sub wasn’t outputting anything. I took it to a repair local repair shop but they couldn’t find anything on the sub. I did find a manual but it appears to be on a site requiring a credit card and mandatory daily fees. I was wondering if anyone here has a manual or schematic that they would be willing to share. Or any suggestions of where to find other info.
Any and all help is appreciated!
Thanks