This is common in phono stages that don't have infrasonic filters. IF you watch your tonearm and cartridge when this occurs, I'm certain that there is much lateral travel occurring. Certain tonearm / cartridge combinations don't mate well due to compliance differences. This could be aggravating the situation. I don't believe that changes in setup would help. Time was, you could buy in-line filters to insert in the interconnect between the turntable and phono stage. I don't know if these are still available. Good luck! Steve
Over-amplified bass from phono stage?
I just recently entered the world of vinyl, and I've been having some scary incidents. I am currently just using the phono stage in my cheapie adcom preamp, and when the volume is turned up past 1/3 or so, the woofers in my speakers start going wacky, moving in and out, with very high excursion but nothing audible. This is in addition to the music that supposed to be coming out. This also happens when the record pops or whatever. Is this a problem with my phono stage, or is my turntable (a pro-ject 1, grado zf3 combo) set up improperly, or is this just a necessary part of analog music? By the way, I only reluctantly buy CD's now. The sound just isn't comparable. Thanks!