JBL Factory Replacement Crossover, Control 28, 129-20020-01, Discontinued (now use JBL-338146-001)

A: If you are getting an intermittent buzz the crossover could be at fault. An easy way to troubleshoot would be to swap the crossovers and see if the problem also moves.

A: JBL Control 28 data shows it as 175 watts and a crossover point of 2.8 kHz.

A: You will need to test the woofer and the tweeter independently to determine if the issue is in the crossover or in the drivers.

A: 2 way at 2.8 kHz, 12 dB per octave.