The most common brands that offer these products include Electro Voice, Inakustik, FBT, Yamaha, Oehlbach, Monkey Banana, AudioQuest, Q Acoustics, Monacor, Italian Stage, Heco, Magnat, Turbosound, RCF, Meinl, Sonos, Behringer, Audio Pro, Polk Audio, Bowers & Wilkins, Bose, Celestion, Eagle Cable, PROEL alebo Konig & Meyer. All brands