RBC | Remote Bass Control. Dial in the perfect bass.
P48 Sub-Woofer Controller (Rev-A)
Nobsound Auto Car Amplifier Audio Subwoofer Bass Control Knob Sub Gain Equalizer Regulator Frequency Controller RCA Line Level Adjust : Amazon.in: Electronics
Vintage Carver DPL-33 Surround Sound Processor & Subwoofer Controller for Parts | eBay
Subwoofer Low Pass Filter Board High Gain & Frequency Preset for Home theater & Car Audio - PCB only | MYPCB
PSB-200 Subwoofer Amplifier with Crossover / Phase Control - 200W – Soundavo
Subwoofer Controller Frequency Phase & Booster - Electronic Circuit
Introducing ActivXO Dual Subwoofer Crossover and Controller - HomeTheaterHifi.com
Auto Audio Regler Verstärker Bass Subwoofer Stereo Equalizer Controller 4 RCA #306 _ - AliExpress Mobile
BOSS Audio Systems CUBE8 8 Inch Car Audio Subwoofer and Amplifier Package – Powered, Built-in Amplifier, Passive Radiator, Remote Subwoofer Control, For Truck, Boxes and Enclosures - Walmart.com
AMPIRE spare parts - level controller for ACTIVE8-PRO subwoofer | Active Subwoofers | Ampire | Product Archive
LECMARK Universal Car Audio Controller Sound Adjuster Boost RCA Level Remote Subwoofer Control : Amazon.in: Electronics
Pyle Active Down Firing Subwoofer - 10 Inches, Ported Design with High-to-Low Input Level Controller, Invisible Down-Firing Speaker, Color Black, Built-in Convenience - PSUB10A - Walmart.com
Car 4-rca, Adjust Line Level Volume, Power Amplifier, Subwoofer Controller | Fruugo DK