Diamond Audio 6.5" Midrange Speakers Motorsport High Output 4 Ohm MP654 Diamond Audio products are designed, developed, and engineered using the latest innovative materials and components to provide the finest sound reproduction possible. These speakers use a pro audio design that gives you great levels of output. The new Diamond Audio MP654 speakers are a perfect solution for Harley baggers. These speakers are an easy fit and do not require an additional tweeter location on the fairing.