The JBL 3105 Crossover Network is a professional audio part designed for speaker systems. Made by the reputable brand JBL, this model is known for its high-quality construction and performance. With a unit quantity of 2, these crossover networks are ideal for vintage audio enthusiasts looking to enhance their speaker systems with reliable and authentic parts. Made in the United States, these components are sure to bring a touch of nostalgia and authenticity to any vintage audio setup. This listing is sold as a pair. One unit has JBL replacement knob w/out the tick marks and is In working condition.