That "pop" was the op amp blowing probably not the record.
You and I certainly do not have to worry. It is virtually impossible to harm a Sound Labs with signal. It requires a pitchfork. Modern subwoofer drivers ( the good ones anyway) will hit their bump stops before any damage is done to the wiring or suspension. If you overdrive them you get a very annoying burp which is difficult to misinterpret. Even the voice coils are hard to burn, copper ribbon on Kaptan formers. That would require a large DC offset.