From the reference circuit diagram in the CXA1145 datasheet, it looks like you need (ordered from closest to the chip to farthest):
- A 470uF capacitor (inline); this probably removes a DC offset, so I don't think the exact value is that important, but that's what is shown in the datasheet
- A 75 ohm resistor (inline)
- A 75 ohm resistor (to ground)