The JBL GTO 20M is a 2-inch (50mm) dome midrange designed for car audio three-way component systems. It provides 65W RMS power handling, 195W peak power, 90dB sensitivity, 500Hz to 7kHz frequency response, a 44mm voice coil diameter, and a nominal impedance of 2.5 ohms.

The speaker is supplied with a bandpass crossover enclosure to integrate with woofers and tweeters, converting two-way systems into three-way systems. Its dome midrange and crossover are intended for custom installations where a dedicated midrange enclosure can be accommodated and amplifier-driven systems are used.