I am spiking my 2Bs right now with 1 3/8" Dayton brass spikes. I removed the bottom riser and will be drilling soon (as soon as my battery charges). Should I put these right in the carpet, or use the cups too. I have an 18" x 18" x 1" piece of oak to put them on, but would rather just put in carpet for WAF. Any thoughts? Will it sound pretty much the same either way?