Reiss RS-Z550.4D 4-channel amplifer Class-D 4x550W @ 4 OhmReiss RS-Z550.4D 4-channel amplifer Class-D 4x550W @ 4 Ohm

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Reiss RS-Z550.4D – 4-Channel Amplifier with Massive Power and Precision

The Reiss RS-Z550.4D is a full-range Class D amplifier built to deliver both power and top-tier sound quality. With an output of 4x550W RMS at 4 ohms and up to 4x900W RMS at 2 ohms, plus the option to bridge to 2x1800W RMS at 4 ohms, it offers flexibility to drive everything from speakers to more demanding bass setups. The high efficiency of the Class D design is paired with a signal-to-noise ratio of 90 dB and total harmonic distortion under 0.3%, ensuring clean and dynamic reproduction even at high volume levels.

With adjustable gain (0.2–10V) and a variable crossover from 40 Hz to 4 kHz, the RS-Z550.4D can be tuned for a wide range of system configurations. Its frequency response of 20 Hz–20 kHz ensures the amplifier reproduces the entire sound spectrum with both depth and detail. For those seeking a versatile, powerful, and reliable amplifier that can take their entire audio system to the next level, the Reiss RS-Z550.4D is the obvious choice.

Technical Specifications

• Number of channels 4 channels
• Power into 2 ohms RMS 4x 900W
• Power into 4 ohms bridged RMS 2x 1800W
• Power into 4 ohms RMS 4x 550W
• Frequency range 55 - 20,000 Hz
• High pass filter 100 - 4,000 Hz
• Low pass filter 40 - 400Hz
• Bass boost 18 dB
• Signal noise 90 dB
• THD 0.3%
• Dimensions 440 X 163 X 55