SB 300 - JBL.com

SB 300
NOTE if amplifier repair involves the removal of the Control PCB:
after the four Phillips machine screws on the faceplate are removed, three
foam tubes need to be pried away from the faceplate in order to access any
of its components with the exception of the wireless module U3. Care
should be taken to do minimal damage to the foam, as these preserve the
air integrity at the openings of the LED and phase & pairing switches. If
these foam tubes are damaged and air is allowed to pass through these
openings upon reassembly, it could affect the performance of the
subwoofer and the escaping air might be audible. Upon reassembly, small
amounts of silicon sealer can be used to assure the foam tubes adhere to
the faceplate as designed.
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