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Uni Block

A heatsink technology used by JBL to shield the amplifier circuitry from radiated noise found in most vehicle's electrical systems.

UniPlane ™

Flat drive technology utilized by JBL. This technology inverts the cone to permit for shallower mounting depth than conventional drivers.

Universal Interface

A JBL innovation that allows amplifiers and other outboard electronics to operate from any type of input from a factory car stereo. The Universal Interface will create a pre-amp quality signal from high power, standard power, or balanced outputs.