M-RBC-1
Water-Resistant Remote Bass Control

MHD-RLC
Water-Resistant Amplifier Remote Level Control and Cable

HD_STACK_KIT
Amplifier Stacking Hardware Kit, HD/MHD

HD-PWRPLUG2-4AWG-RP
Replacement Power Plug (Type 1)

HD-SPKPLUG-2-RP
48081

HD-SPKPLUG-4-RP
Replacement Speaker Plug (4-Pole)