Home » JA Audio Products » Accessory JA-SC6 12 position rotary controls provide -34~0dB attenuation to both left and right speaker lines. The control features impedance matching capabilities that allow for easy installation. JA-VNB-75 12 position rotary controls provide -34~0dB attenuation to both left and right speaker lines. The control features impedance matching capabilities that allow for easy installation. JA-VSL-100 This is our solution to high quality stereo slide volume control. 12 position Slider style controls provide -34~0dB attenuation to both left and right speaker lines. The control features impedance matching capabilities that allow for easy installation