What should I use between spikes and wood floor?

I use pennies with a little felt on the side making contact with wood floor. It works fine.

Take a 4lb hand sledge and drive those spikes in.

Don't use spikes. Go to office depot and buy a sheet of cork and cut 8 small squares together, glue them so there are four and put them under each corder. Cork is used in soundproofing rooms and is mostly air. Another alternative is felt pads. Or both.

Try Herbie's Audio Lab "combat boots" depending upon weight of the speaker. Find the website under Audiogon Mfg list. Terrific products!

Jack

I use the Audiopoints and coupling discs that WarrenH suggested. They work really well and they're fairly cheap. Looking at your system pictures, you may benefit from the Audiopoints under all of your components too. I know that I did. I just purchased their Sistrum SP-6 stand, which is even better, if you ever want to change things up a little.

The coupling discs are $6.99 a piece at www.audiopoints.com, so basically $56.00 and you're all set.