![]() Speaker Impedance - Most Rockford Fosgate amplifiers operating in Stereo/Mono Mode can operate at 2-Ohms for each stereo channel and 4-Ohms for the bridged/mono channel.However if, for some reason, you need to manually reset them, use the method above described in Stereo Mode. These usually do not need adjustment from the factory. Gain Control - The input gains for left and right channels need to be set to the same level when operating in Stereo/Mono Mode.Stereo/Mono Mode (also called Tri-mode & Mixed-Mono mode) - The diagram below illustrates how to configure most Rockford Fosgate 2-channel amplifiers for stereo/mono mode. It is important that you do not connect a speaker system to your amplifier that results in an impedance lower than the minimum recommended for your amplifier. Speaker Impedance - Most Rockford Fosgate amplifiers can operate at 4-Ohms in Mono (Bridged) Mode.Therefore the crossover should be set to Low-Pass (LP) so only low frequencies (bass) will pass to the subwoofer system. More than likely only subwoofers will be connected to the amp when used in Mono (Bridged) Mode. Crossovers - Your amplifier may utilize an internal crossover.Gain Control - The input gains for left and right channels need to be set to the same level when operating in Mono (Bridged) Mode. ![]() If your source unit or signal processor only provides one (1) sub-level pre-out, use a "Y-adapter" to convert the (1) RCA feed into (2) RCA inputs. When using the RCA inputs, both inputs must be utilized. Use only one method when connecting an input signal to the amplifier. ![]() Low-Level inputs are used when the source unit has preamp line (RCA) outputs. Hi-Level inputs are used when the source unit only has speaker line outputs.
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