Quantum Audio QA4-2000

Quantum Audio QA4-2000 QA Series 4 Channel 250W RMS x 4 at 2 Ohm, Class A/B Car Amplifier

We are a Quantum Audio authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!

What’s Inside?

• • 4-Channel Class A/B Amplifier
• • Owner’s Manual

4-Channel Power with Flexible, Clean Connectivity

Experience powerful, full-range sound with 4-channel Class AB circuitry that blends warmth and efficiency for dynamic audio. Maximize your system’s output with stable 2-ohm stereo capability, giving you the freedom to run multiple speakers with ease. Cleanly connect your head unit or processor through low-level RCA inputs for crisp, uninterrupted signal flow.

Custom Tuning, Bridgeable Power, Total System Flexibility

Take total control of your sound with a variable crossover offering High Pass, Low Pass, and Full Range settings for precise tuning. Boost your system’s power by bridging channels at 4 ohms — perfect for driving subwoofers or high-output speakers. Compatible with both 2-ohm and 4-ohm speakers, this amp gives you the freedom to build your ideal setup without limits.

Efficient Power and Advanced Heat Protection

Deliver clean, consistent power at any volume with a high-efficiency MOSFET design built for reliable, energy-smart performance. The advanced Q-Sink Heat Management System keeps your amplifier cool and protected, even during intense, high-demand sessions. Together, they guarantee dependable, uninterrupted sound performance for every drive.