4-channel car audio amplifier PSSO QDA-4400 — 4400W RMS total power

PSSO QDA-4400 is a 4-channel car audio amplifier offering a combined 4400W RMS total output. Engineered to supply power to front and rear speakers or to be bridged for subwoofer use, it is intended for automotive audio upgrades where increased headroom and dynamic range are required. The amplifier supports typical car audio wiring and provides four discrete outputs to accommodate a variety of speaker configurations.

Advantages

The amplifier delivers high continuous power across four channels, enabling consistent playback levels and improved dynamics compared with many factory units. Its flexible channel arrangement allows use in full four-channel systems or bridged modes for subwoofer integration. The unit’s design focuses on stable power delivery suitable for common automotive speaker impedances and standard car installation practices, reducing the need for complex reconfiguration when upgrading a vehicle sound system.

Suitable for

Key specifications

How to use

Install the amplifier following standard automotive safety and wiring practices: disconnect the vehicle battery before beginning, secure the amplifier to a stable surface with appropriate ventilation, and use suitably rated power and ground cables. Connect the head unit or processor outputs to the amplifier’s inputs, and wire speakers to the four outputs according to the desired configuration (individual front and rear channels or bridged pairs for subwoofer use). After wiring, reconnect the battery and set gain and crossover controls at the amplifier to match the speaker specifications and head unit output level, then fine-tune during listening tests to avoid distortion.

Recommendations

Use properly sized power and ground wiring and install an inline fuse near the battery to protect the vehicle electrical system. Match speaker impedance to the amplifier’s supported loads and avoid driving the amplifier into clipping; ensure gains are adjusted conservatively to maintain signal integrity and prolong component life.