I've always found spikes to improve the sound of loudspeakers, but not anywhere near as much as the surface they are standing on. However spikes (for me) don't work so well for most components, saying that they worked VERY well with my MF player & DAC.
Ben Duncan mains conditioner
2022 MacBook Pro 14" M1 Pro 10/16/16/16
Samsung QE75Q90T 75" QLED TV
XMOS DSD Async USB to Coax converter
RME Audio ADI-2 FS (AK4493) DAC
Chord Clearway XLR interconnects
Audioquest Crimson USB interconnect
QED Quartz Reference optical interconnect
Edifier S3000 Pro active speakers
Atacama SE24 stands