Rockford Fosgate T600-4 600W 4-Channel Amplifier

The Rockford Fosgate Power T600-4 is a four-channel car audio amplifier for adding clean, dedicated power to front and rear speakers or a mixed speaker-and-subwoofer system. It is rated for 600 watts RMS total and gives installers flexible four-channel, two-channel, and bridged configuration options. This makes it a practical choice for replacing head-unit power in a system that needs more output and control.

At 4 ohms, the T600-4 delivers 100 watts RMS to each of its four channels, while 2-ohm operation raises output to 150 watts RMS per channel. It can also bridge into two 4-ohm loads for 300 watts RMS per bridged pair. The amplifier is 2-ohm stable when configured as two bridged channels.

The Class A/B circuit topology is intended for full-range amplification, with a 20 Hz to 20 kHz frequency response. Separate front and rear crossover controls help tailor the amplifier for component speakers, coaxials, or a front-stage-plus-subwoofer arrangement. Variable Punch EQ provides bass and treble adjustment for each channel pair.

Differential RCA inputs support connection to an aftermarket source unit, while the 2-channel/4-channel input switch can simplify signal routing when only one stereo RCA pair is available. A low-level RCA pass-through output can feed another amplifier in an expanded system. Power, thermal, and protect indicators provide at-a-glance operating status.

Its compact 2.14-inch-high chassis is suited to installations where amplifier space is limited but substantial full-range power is required. The T600-4 uses a MOSFET power supply and MOSFET output stage, along with convection cooling. It is a strong fit for a multi-speaker upgrade that may later add a second amplifier through its RCA pass-through output.

Key Features

• 600 Watts RMS Total: Supplies substantial continuous power across four channels.
• Flexible Channel Configuration: Operates in four-channel or bridged two-channel system layouts.
• Class A/B Topology: Supports full-range speaker amplification with broad frequency response.
• 24 dB/Octave Crossovers: Helps match channels to speakers or subwoofers.
• Punch EQ Controls: Allows bass and treble adjustment by channel pair.
• RCA Pass-Through Output: Supports adding another amplifier without splitting the source signal.

Design & Installation

The T600-4 combines a compact chassis with a MOSFET power supply, MOSFET output stage, convection cooling, and a heatsink-based thermal design. Its connection layout includes 4 AWG power and ground connections, audiophile-grade speaker connections, RCA inputs, and an RCA pass-through output. Front-panel indicators identify power, thermal, and protection status.

Use 4 AWG power and ground wiring, protect the power lead with the specified external fuse, and connect the amplifier to a suitable 9 to 16 VDC vehicle electrical system. Match speakers to the selected stereo or bridged impedance configuration, and use the front and rear high-pass or low-pass filters to suit the speakers connected to each channel pair. For bridged operation, use the amplifier's specified wiring arrangement and only connect supported loads.