Charlesbank Capital-backed Sound United, an audio equipment maker, completed the acquisition of Bowers & Wilkins, which designs and sells audio equipment for mobiles, automobile, computers and other electronic devices. Financial terms were not disclosed. “Acquiring Bowers & Wilkins combines its industry-leading acoustic design, engineering and manufacturing expertise in the premium category with Sound United’s scale, technical acumen and consumer reach to ensure Bowers & Wilkins thrives moving forward,” Kevin Duffy, Sound United CEO.