Patent Review: Diaphragm Ported Tweeter (opens in new tab)

The ported tweeter patent discussed in this review was awarded to Alexander B. Ralph (Winter Garden, FL), listed as the sole inventor and owner. In this article, James Croft offers a look at all the related inventions and innovations that have long been associated with the ubiquitous 25mm dome tweeter - an industry standard and the preferred high-frequency transducer.