Pre-amp / 9 band, Low Pass and High Pass 18 dB/octave crossover

KICKER KQ9
A ton of features are packed in this little half-DIN dash-mount box. You get nine bands of 12dB cut or boost (one especially for bass), two 18dB/octave active crossovers (one high-pass and one low-pass), a sub-bass output controller, and lots more.

 
Product Features

Features
9-Band Equalizer with Defeat Switch
Variable 40 – 60 Hz Sub-Bass Equalizer Band
Front and Rear Outputs with Fader Control
Defeatable High-Pass Crossover
Selectable Green or Red Illumination Color
Variable Subwoofer Crossover with Level Control
High or Low Level Inputs
Specifications
Equalizer Bands: 9
Maximum Boost / Cut: 12 dB
High-Pass Crossover: Defeatable 100 Hz
Low-Pass Crossover: Variable 60-120 Hz
Crossover Slope: 18 dB / Octave
Maximum Output Level: 5 Volts RMS