Chapter 1 Introduction
This manual covers the installation procedures for XPR 4300/4350/4500/4550 mobile and 
motorcycle radios with O5 control heads and accessories required to complete the radio system. The 
radio system consists of a control head, radio, antenna, microphone, speaker, cabling, and 
accessories.
1.1 Mobile Radio Description
1.1.1 Dimensions
Figure 1-1 and Figure 1-2 show the basic dimensions of the dash mount transceiver trunnion XPR 
4300/4350/4500/4550. The transceiver portion of a remote mount is sized similarly. 
When installing the radio, make sure to plan the installation carefully and leave additional room in the 
rear of the radio for cabling and accessory connections; in the front of the radio for access, controls, 
and cabling; and to the sides of the radio so that you may access and install the trunnion wing 
screws.
NOTE: The rear accessory connector adds 0.75 in. to the overall length.
Figure 1-1.  Front View of Dash Mount 
Transceiver Trunnion
Figure 1-2.  Side View of Dash Mount Transceiver 
Trunnion
8.5"
7.1"
9.6
9.1
2"
3.5