Review on AudioControl AC LGD Generating Device Stabilizer by Mike Bigglesworth

That's the best $30 money you can spend using the high level (speaker level) inputs with either an amplifier or line-out converter (LOC)! The bass from my sub was erratic. Sometimes he hit, sometimes the bass was missing. I bought the LOC and it made an improvement but still shaky bass. I bought it and installed it as soon as it was delivered. The difference was day and night! My MTX mono amplifier produces a decent amount of bass. In many modern cars, everything is integrated into a multifunctional infotainment center. Therefore, the use of high-level inputs in the amplifier or LOC is mandatory. The stereos in these infotainment centers need to load the speakers to deliver the right signal. These LGDs return "speaker load" to the system. The result is a clean, stable signal to your amplifier/local controller.