Infinity Reference 3004A 4-Channel Car Amplifier Pro Audio Cables 1D is a one-channel car

1D is a one-channel car audio amplifier designed to power a subwoofer system

For the manufacturer-published ported recommendation

In-Line Crossovers Included: Direct high and low frequencies to the appropriate drivers

Its four-channel layout suits vehicles receiving amplified component or coaxial speakers

Straight Gold-Plated TS Plugs: Fits standard 1/4-inch mono instrument connections

Infinity Reference 3004A 4-Channel Car Amplifier Pro Audio Cables 1D is a one-channel carThe Infinity Reference 3004A is a four channel car amplifier designed to add dedicated power to front and rear speakers in an aftermarket or factory integrated audio system. It delivers 75 watts RMS to each of four channels at 4 ohms, giving compatible speakers more headroom than a typical built in radio amplifier. Its compact footprint helps make an amplified speaker upgrade practical where mounting space is limited. This amplifier suits listeners