In an alternative embodiment, the spacing of coaxial cables 104, 106, 108 and the drain wire 114 may be created by a combination of both position within the outer jacket 102 and the outer diameter of one or more of the materials making up the coaxial cables 104, 106, 108 and/or the drain wire 114. In yet another embodiment, impedance requirements of one or more of the coaxial cables 104, 106, 108 may also affect the geometry and materials of the array or the spacing of the cables/wires within the array. For example, due to an overall length of the cable assembly 100 or a particular source device, the optimal impedance of one coaxial cable may be approximately 50 ohms while a second coaxial cable's optimal impedance may be between about 25-75 ohms. The center conductor 110, dielectric 112, shield 116, and outer jacket 102 for each coaxial cable may be selected or physically altered to provide the required electrical or mechanical performance while also providing a desired outer diameter to match the dimensions or pitch of the source device. Accordingly, the size of the array may be optimized to control the outer diameter of the cable assembly 100 and/or the position of the cables 104, 106, 108 and the drain wire 114 within the outer jacket 102.