Does a Subwoofer Make Spiking Redundant?

My speakers are spiked, heavy carpet, pad and plywood underneath. 
   If I place on rug, they are tipsy. 

What else you recommend?

 

I looked at those Townshend Podiums. You must understand that those things go for about what I could afford to pay for a speaker. Of course, if you're playing a $299 copy of In-A-Gadda-Da-Vida through an $8,000 speaker, it's perfectly proportional.

Hello Miller, boing boing, you are still wrong.

Heretobuy.  Your are saved from suffering bad SQ from Miller's heresy not by your own wisdom but by shortage of funds.  Whatever!  More than one way to save yourself!

Most of you have misunderstood OP's question.  He asks: if you have subwoofer(s) does this mean you don't have to spike your main speakers because you don't need them to produce articulate low bass.

OP misunderstands the reason for spiking.  It is to prevent the whole speaker moving around and adding that movement to the signal driven movement of the cones etc.  We need to listen to the signal and not the extraneous movement that smears the sound and the soundstage, across the whole frequency range, not just the bass.  Remember, even if you add subwoofer(s) your main speakers are still reproducing low frequencies as before, unless you mess with their electronics.

PMM.  If you bolt (or spike) your speakers to a concrete floor laid on the ground with a good rigid foundation, the vibration passed into the speakers is the vibration of the mass of planet Earth.  That's quite a lot of mass to move around!  There again, Red Indians used to put their ear to the ground and heard riders and horses miles away.  At least they did in movies.

lt would be fun to do a blind test with and without spikes.  Then demo the subwoofers without spikes and tell the listener they are listening to subwoofers with spikes how many would either hear the difference or because they were told they were listening to a subwoofer with spikes automatically convince themselves because they were told they were listening to subs with spikes they sounded better.  I call this the EMERORS NEW CLOTHS SYNDROME.

My speakers are spiked, heavy carpet, pad and plywood underneath.
   If I place on rug, they are tipsy.

The job of the spikes is to pierce the carpet. Lose the plywood and pad.  But you may leave a mark on the underlay if it is hardwood.