7.Bass/Center setting (3-pin BCS1, BCS2)
These jumpers allow you to select the speaker output for a 6-channel audio system. No audio standard exists for the three pick-up surfaces on male audio ports, so it is necessary to switch the jumpers from the default position BASS/CENTER (pins 1-2) to CENTER/BASS (pins 2-3) to re-route signals on the internal leads of the Mic port.
Use the audio driver included in the support CD to install the multi- channel audio feature.
P4B-E Bass Center Setting
Figure 2-28 Bass/Center Settings8.USB port selection (3-pin CNRUSB0, CNRUSB1)
When set to pins 1-2, these jumpers activate external USB ports on the rear panel. Setting the jumpers to pins 2-3 activates the CNR slot. Both jumpers are set to pins 1-2 by default.
USE CNR USB
P4B-E CNR/USB SelectionFigure 2-29 USB Port Selection
Chapter 2: Hardware information