u/Apprehensive-Army642

I am unable to use my subwoofer while playing my vinyl because of vibration feedback. Although I’m planning on getting an isolation stand and a pre-amp, would it be better to buy the stand first or a pre-amp amp with. Subsonic filter first? I’m in the US, and my budget for the amp is around 300-400 and the budget for the stand is around 200-300.