4-Pin Power Plug US AMPS Equalizer Line Driver Amplifier

4-Pin Power Plug HELIX Equalizer Line Driver Amplifier

5-Pin Speaker / Power Plug JL AUDIO Amplifier Processor

4-Pin Power Plug HELIX Amp Equalizer Line Driver Amplifier

2-Pin Speaker / Power Plug US AMPS Eq Line Driver Amplifier

2-Pin Speaker / Power Plug ORION Amplifier Equalizer Line Drive

2-Pin Speaker / Power Plug SOUNDTSREAM SOUNDS STREAM Eq Line Driver Amplifier

2-Pin Speaker / Power Plug SOUNDTSREAM US AMPS ZAPCO Eq Line Driver Amplifier