So Today It Was Time To Spike The Wharfedale Xarus 5000 Speakers!! The spikes have made a great improvement, the bass is much tighter & controlled as my floor is concrete beneath the carpet!! Still running these things in as they have had virtually no use since new & are sounding better every day!! Dolby Digital films are just plain frightening! lol bass grumbles through the floor & catches you out a lot, while the Jamo 3 way omni-surround speakers behind you also surprise you!! Enough for today I am shattered, these floorstanders are heavy!!