High-End CrossoverLike our Bass Optimizer, The High End Crossover provides electronic compensation and protection for the TN Series. However, if you use a preamp without a crossover, Dolby Digital, or bass management, the Bass Optimizer is not enough. Our High End Crossover provides both high and low pass RCA type line level outputs. The crossover frequency is set by the interchangeable Crossover Modules. A volume knob lets you adjust the subwoofer level, and a