As mentioned, you were either suffering from acoustic feedback ( speakers too close to a turntable that is vibrating with the beat of the music ), the records were producing tons of low bass due to record warps or the phono section is defective.
If you want to see if it was acoustic feedback, you would have to have some speakers with functioning woofers hooked up. You would have to select the phono section and crank the volume WAY, WAY up without playing anything. If you can do this and you don't hear a loud low frequency howl, your turntable is stable and not suffering from acoustic feedback in a severe manner. It is possible for acoustic feedback to set in once music is playing, but this is a "quick & dirty" test.
As far as record warps go, you can watch a record go round and look at the woofers. If the record has a warp to it, you will see the woofer jump when it comes to that section of the record. The only cure for this is to not play that record, use a "high pass filter" or find a way to flatten the record out.
As far as the phono section passing DC, that is something that the manufacturer will have to correct. There are ways to fix this, but it would be best for them to correct the problem rather than you have to resort to performing a band aid that may reduce the performance of the system. Sean
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If you want to see if it was acoustic feedback, you would have to have some speakers with functioning woofers hooked up. You would have to select the phono section and crank the volume WAY, WAY up without playing anything. If you can do this and you don't hear a loud low frequency howl, your turntable is stable and not suffering from acoustic feedback in a severe manner. It is possible for acoustic feedback to set in once music is playing, but this is a "quick & dirty" test.
As far as record warps go, you can watch a record go round and look at the woofers. If the record has a warp to it, you will see the woofer jump when it comes to that section of the record. The only cure for this is to not play that record, use a "high pass filter" or find a way to flatten the record out.
As far as the phono section passing DC, that is something that the manufacturer will have to correct. There are ways to fix this, but it would be best for them to correct the problem rather than you have to resort to performing a band aid that may reduce the performance of the system. Sean
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