Full Range Class D Digital Monoblock Amplifier — 1500 W RMS

The Concrete Audio CA1500-1SLM is a high-efficiency Class D digital monoblock amplifier engineered for robust power delivery and clean performance in custom audio systems. Designed to run cool and stable under load, this amp is stable at one ohm and offers a suite of tuning features so you can tailor low-frequency output to your subwoofer and enclosure setup.

With 1800 W RMS at one ohm, 1200 W RMS at two ohm, and 600 W RMS at four ohm, the CA1500-1SLM is versatile enough for a variety of builds — from high-output daily drivers to competition-ready bass systems. Advanced features include a low-pass crossover (50 Hz–20 kHz), subsonic filter (15 Hz–5 kHz), and adjustable bass boost (0–12 dB), giving you precise control over the amp’s performance.

Built with thermal, overload, short-circuit, and voltage protection, this amplifier provides reliable operation even under demanding conditions. Its compact design fits neatly into most installations, while its efficient architecture ensures clean power delivery with minimal distortion and a high signal-to-noise ratio.

Key Features:

• Amplifier Type: Class D digital monoblock

• Power Output:

  • 1800 W RMS @ one ohm

  • 1200 W RMS @ two ohm

  • 600 W RMS @ four ohm

• Low-Pass Crossover: 50 Hz–20 kHz

• Subsonic Filter Range: 15 Hz–5 kHz

• Bass Boost: 0–12 dB (30 Hz–70 Hz)

• Signal-to-Noise Ratio: >90 dB

• Protections: Thermal, overload, short circuit, voltage