I will second the opinion about the nickels below the speakers.
I use pennys below my spikes. It works quite well, However depending on the wieght of your speakers you might want to spring the extra 32 cents and use nickels.
The Copper in the pennies is softer and a really heavy speaker with spikes can drill there way through a penny over a few months. I just colored mine black with a Jiffy marker as not to stand out.
Cheers,
Nick
I use pennys below my spikes. It works quite well, However depending on the wieght of your speakers you might want to spring the extra 32 cents and use nickels.
The Copper in the pennies is softer and a really heavy speaker with spikes can drill there way through a penny over a few months. I just colored mine black with a Jiffy marker as not to stand out.
Cheers,
Nick