Audiopipe EQ-4-V15 4-Band Graphic Equalizer with Subwoofer Control – LifeAfterBass
XEQ7 7-Band Graphic Equalizer with Front 3.5mm Auxiliary Input — NVX
Amazon.com: Facmogu 2.1 CH 5-Band Car Audio Equalizer EQ, Adjustable 5 Bands EQ Car Amplifier Graphic Equalizer, w/Front, Rear + Sub Output and 2 Aux Input for Boat RV RTV Motorcycle Car
Eight Band Sub-Woofer Equaliser
Amazon.com: Gravity GR-EQP11 Digital Bass Machine 1/2 Din 9V 4-Way Car Parametric Equalizer w/Front, Rear + Sub Output and Night Illumination : Electronics
Amazon.com: PyleUsa 5 Bands Graphic Equalizer with SUB Volume Adjustable for Subwoofer Channel, Built in Bluetooth for Wireless Music Streaming, Stereo RCA Output, Aux RCA Input, Mounting Hardware Included : Electronics
5 Band Parametric Equalizer & Pre-Amp Subwoofer Gain Control - Amplifier - Audio Accessories
Black Diamond 7 Band Graphic Equalizer with Subwoofer Section EQ7LS
Dayton Audio DTA-100LF Desktop Subwoofer Amplifier with EQ