JBL engineers designed the GTO329 coaxial speaker to produce exceptional, clear sound from a head-unit or amplifier capable of delivering up to 75 watts of power. This makes the GTO329 an ideal match to systems powered with head-unit or factory-amplifier power levels. Even better, the speaker matches many of the GTO Series' amplifier combinations. As a result, it can keep up with systems that feature one or more subwoofers. And its great power-handling specifications also increase reliability over the lifetime of the speaker.