We're the old ones ferrofluid filled? You can see my DSP420 thread were I had to replace several - the speakers sound amazing now - as good as new - I paid 125 USD each for new ones

1. 568.2mm & 3xDSP5500 2. 565/562 & DSP5000's 3. Director & 568.1 & Edge Amp & Klipschorns