Planet Audio PEQ15 5 Band Pre-Amp Car Audio Equalizer - Half Din, Subwoofer Output with Adjustable Filter, Fixed Bands, Remote Subwoofer Level Control
Planet Audio
7 Band Parametric Equalizer - 7 Volt RMS Pre-Amp Output with Subwoofer Gain Control, and 3 Input Sources Selectable, Blue Light Illumination
Pyle
BOSS Audio BX55 2/3 way Pre-Amp Car Electronic Crossover with Remote Subwoofer Control
Boss Audio Systems
BOSS Audio BX45 2/3 Way Pre-Amp Car Electronic Crossover with Remote Subwoofer Control
BOSS Audio