That night, with shaking hands, he plugged a bare 3.5mm cable into the Control Port. He tapped the left tweeter. Tap. Tap. Tap. A faint green LED, which he had never seen before, blinked to life inside the bass port. He powered the amp.
Allows for ±5 levels (11 steps) of pitch adjustment to match the singer's vocal range. jbl rma 220 user manual exclusive