SoundQubed C4-2800 – 2800W 4-Channel Full-Range Digital Amplifier

The SoundQubed C4-2800 is a high-output 4-channel full-range digital amplifier built for serious car audio, motorcycle audio, powersports, and custom multi-speaker systems.

Delivering 350 watts RMS x 4 at 4 ohms and 700 watts RMS x 4 at 2 ohms, the C4-2800 gives installers substantial power across four channels while maintaining a compact footprint. It can also be bridged for up to 1,400 watts RMS x 2 at 4 ohms, making it a highly flexible option for demanding system designs.

With selectable crossovers, clipping protection, high-efficiency digital circuitry, and a wide input-voltage range, the C4-2800 is designed for clean, controlled output in high-performance systems.

Power Output

• 350W RMS x 4 @ 4 Ohms
• 700W RMS x 4 @ 2 Ohms
• 1,400W RMS x 2 @ 4 Ohms Bridged
• 2 Ohm minimum stereo impedance
• 4 Ohm minimum bridged impedance

Audio Specifications

• Frequency Response: 10Hz–25kHz
• Signal-to-Noise Ratio: 95dB
• Efficiency @ 4 Ohms: 85%
• Damping Factor: 92
• Input Impedance: 22K Ohms
• Channel Separation: 40dB
• Total Harmonic Distortion: 0.10%
• Low-Level Input Range: 400mV–6V

Crossover Controls

Channels 1/2

• Selectable HPF / Full

Channels 3/4

• Selectable HPF / Full / BPF
• HPF Range: 20Hz–2kHz
• LPF Range: 100Hz–20kHz
• X1 / X10 crossover frequency multiplier

The flexible crossover section makes the C4-2800 an excellent option for properly band-passing high-output midrange speakers and building multi-way systems.

Features

• High-efficiency digital amplifier design
• Stereo full-range amplifier
• 4 channels
• Power / Protect / Clip LED indicators
• 4-gauge power input terminals
• Recommended fuse size: 250A
• Thermal protection
• Overload protection
• DC output protection
• Short-circuit output protection
• Voltage input protection
• Clipping protection
• Crossover frequency multiplier
• Tiffany-style RCA connections
• Quality-control verification using Audio Precision test equipment
• Black finish

Dimensions

• Overall Length: 9.53" / 242mm
• Overall Width: 5.91" / 150mm
• Overall Height: 2.17" / 55mm
• Heatsink Length: 8.35" / 212mm

Ideal For

The C4-2800 is an excellent choice for:

• High-output motorcycle audio
• Pro-audio mids and highs
• Multi-speaker door systems
• Powersports builds
• Full-range automotive systems
• Systems requiring high power in a compact footprint

For motorcycle and high-output applications, we strongly recommend proper crossover setup, gain structure, electrical support, and DSP integration to get the most out of the amplifier.