Note: The input plate displays two LF connections, and their icons are the same size because the
drivers are the same size. Icon 1 represents the top driver in the cabinet, and icon 2 represents the
bottom driver in the cabinet. There is no crossover in the CS128LF.
2. Strip back the wire insulation/sheath to 18mm.
3. Locate the orange terminal tab, and then push it inward.
The terminal tab is spring loaded, and pushing it inward opens the gap in the hole directly below the tab.
4. Insert the wire fully into the hole.
5. Release the terminal tab, and the spring mount clamp will secure the wire.
Figure 20: CS128LF parallel operating mode
Figure 21: Independent operating mode
6. Inspect the terminal for any stray wire strands, and then remove if any are found.
Note: The input terminals are marked with indicators to show their polarity. Per IEC standards, a
positive voltage on the positive marked input results in the transducers moving outward. Always
tie the cable down to the available hardware to minimize any buzzing or pullouts. If possible, after
wiring is completed, play sound through the speaker to identify any connection issues, buzzing, or
rattling. Refer to the figures in the wiring sections that follow.
The Dolby Speaker System 128 always runs in bi-amplifier mode with the CS128MH and CS128LF
requiring external amplifier processing for crossovers and gain settings. The CS128LF ships in parallel
mode (single amplifier channel for both drivers) but can be changed such that an individual amplifier
channel can be used for each 15 inch woofer.
Connecting and configuring the CS128LF
Dolby Speaker System 128 Owner's Manual
25
8800293 Issue 2
27 October 2021
