CB1-2500D | 2500W Class D Monoblock Amplifier

Power Acoustik CB1‑2500D – 2500W Class D Monoblock Amplifier (Caliber Series)

The Power Acoustik CB1‑2500D belongs to the Caliber Series, purpose-built for subwoofer control, clean signal output, and space-conscious installs. With Class D topology, 1-ohm stability, and a max power rating of 2500 watts, this amplifier delivers solid output while maintaining efficiency and operational safety.

Designed for both competitive audio setups and OEM upgrades, the CB1-2500D offers low distortion, heat-resistant PCB construction, and onboard tuning tools for consistent low-frequency performance.

Power Output & Load Handling

Tuned for real-world speaker loads, the amplifier provides:

• 1250W RMS @ 1 ohm
• 850W RMS @ 2 ohm
• 500W RMS @ 4 ohm
• 2500W peak output

For users pushing high-demand subwoofer arrays, the amp is strappable, allowing two units to be linked for synchronized operation and double output. Pair this with a robust cooling system, and you get a high-current solution ready for daily or demo use.

Built-In Signal Processing

The CB1‑2500D offers granular audio controls for tailoring subwoofer behavior:

• Variable low-pass crossover: 30Hz–250Hz (12dB/octave)
• Subsonic filter: 20Hz–50Hz (12dB/octave)
• Bass boost: Adjustable up to 12dB
• Phase shift: 0°–180°

These features ensure tight, responsive bass, whether you're running a sealed, ported, or bandpass enclosure.

Input Options & Integration

With both low-level RCA and high-level speaker inputs, the amplifier integrates easily with:

• Factory stereos (using speaker-level input)
• Aftermarket head units (via RCA line-in)

Additional features include:

• Dash-mounted remote bass level knob for in-car control
• Input sensitivity range: 200mV – 6V

Build, Protection & Layout

The amplifier is constructed using a military-grade PWM MOSFET power supply on a precision-engineered PCB. It includes:

• Short circuit, thermal, and overload protection
• Dual 60A fuses (120A total)
• Power terminals: 4AWG
• Speaker terminals: 8AWG

All packed into a compact 2″ × 9.5″ × 12″ housing, making it ideal for hidden or trunk-mounted installs.