Q.E.D.

QED XT40i – Using updated X-Tube™ technology and an innovative Air Gap dielectric, QED has created a cable that delivers impeccable stereo imaging, rhythmic accuracy and detailed sound.

High-quality XT40i speaker connection cable with X-Tube™ technology.

High quality Performance Original speaker connection cable.

QED Golden Anniversary XT - New technologies such as X-Tube™ Plus and a hybrid ultra-pure copper conductor design allow the Golden Anniversary XT to deliver unrivaled sonic detail, accuracy and dynamic subtlety.

The history of QED speaker cables began in 1973, when the world's first specialized speaker cables were produced.