Xtenzi Amplifier Bass Volume Knob Control Remote XTBR40 Compatible with Skar Audio Select Models: SKv2-1500.1D,SKv2-2500.1D,SKv2-3500.1D,SKv2-4500.1D,SK-2500.1D,SK-3500.1D,SK-4500.1D, 8-PIN The Xtenzi Brand External Remote

The Xtenzi Brand External Remote Knob XTBR14 Bass Boost Wired Variable Level Controller (secondary gain control)

The Epicenter Plus

if you are unsure fitting

Sony CDC-R504MP

it's only the 8PIN-Flexible wire/Cable

Xtenzi Amplifier Bass Volume Knob Control Remote XTBR40 Compatible with Skar Audio Select Models: SKv2-1500.1D,SKv2-2500.1D,SKv2-3500.1D,SKv2-4500.1D,SK-2500.1D,SK-3500.1D,SK-4500.1D, 8-PIN The Xtenzi Brand External RemoteThe Xtenzi Remote Amplifier Level Controller (Model: XTBR40 91595) is the perfect optional bass remote for Skar Audio Amplifiers, giving you total control over your bass levelsright from the driver's seat or any convenient location in your vehicle. No more reaching for the amplifier in the trunk or under the seat. This easy to use remote allows you to adjust bass gain levels on the fly, Designed for simple plug and play installation, the controller