Speaker-Level (High-Level) Input
Speaker-Level Input counts the subwoofer inputs intended to receive a signal from an amplifier’s speaker-output terminals.
Also called a high-level input, it accepts the higher-voltage signal used to drive passive speakers. In a powered subwoofer, that input supplies a signal to the subwoofer’s own electronics; it does not mean the main amplifier must provide the subwoofer driver’s operating power.
Speaker-Level (High-Level) Input — Subwoofer
Check the specified connection arrangement for both amplifier and subwoofer. Some amplifier outputs do not share a common return, and their negative terminals must not be joined or assumed to be ground. Use only a connection the equipment supports, with power off as instructed before changing wiring.
Distinguish inputs from any speaker-level pass-through outputs, and check whether a count refers to channels or connection pairs. The count alone does not identify the connector, prove compatibility with every amplifier or establish filtering of the main speakers. Line-level RCA, XLR and LFE inputs are separate connections.