The Diamond Audio MS6NEO is Diamond's top of the line 6x9 for competition level systems. These speakers are designed specifically for extreme level output Harley Davidson stereo systems. The accordion style progressive suspension keeps the speaker cone under control when under high demand. The motor structures of the MS69NEO speakers are premium Neodymium which is much stronger yet lighter and smaller than iron magnets usually seen on 6x9 speakers. The Neodymium magnets are more expensive than iron but much more powerful. In lid speaker applications these speakers are impervious to the weather due to the carbon fiber cone construction and closed dust caps. Unlike coaxial 6x9s that have an open voice coil, the close dust cap design eliminates the chance of any water making it down into your bags.