Spikes for very heavy speakers


Andrea II at 215lbs each - they come with spikes but my question is..... Since I will be placing them in my basement which has concrete slab....should I first get a small piece of thick solid wood...say 1inch think and place them on such a wooden platform or do you think it is OK to have the spikes direct on the concrete.... 
My only concern is of course that under such weight and no normal flexibility like you get with wood floors or even thick carpet - the tips of the spikes may bend slightly or the surface may chip making the speaker unbalanced / uneven...
I am not talking about significant crack or anything like that... but say even 1/16inch "dimple" 

thanks !
ether
I have carpet over pad on a concrete floor. The spikes go all the way through. I wouldn't hesitate to run them directly on concrete. Using the OregonDV xl spikes and the speaker is probably 125 lbs per.
Just to clarify - my current question and concern is around feasibility of spikes "biting" into concrete.
My last speakers were 95lbs....and I had no problem resting them on spikes but now I am just not sure if 4 tiny points holding 215 lbs against concrete was the best approach.
I wouldn't hesitate if I had wooden floors (knowing they will just dig in as far as they can) but with concrete slab I thought I might not be able to provide proper stability via spikes 

I am guessing maybe I am just over-analyzing it ......
@ether, is your entire floor in the room you will be listening to music in all concrete or is part of it carpeted?

only where the equipment rests is bare floor..... rest is carpeted.....I know....I know... this would be some crazy echo chamber if it was all concrete
Audio Points may be an option here. There are a set that can handle upto 450lbs and you can add the coupling disks or APC-D4 invert to protect the spikes from bending. I should add they also make significant improvement to the sound.   Good luck