III 4-Channel Class AB Amplifier

The Zapco ST-4X SQ III is a 4-channel, full-range, Class AB sound quality amplifier engineered for exceptional audio performance in your vehicle. It boasts Tiffany-style panel mount RCA connectors for a robust signal connection and accepts speaker-level inputs, offering flexibility in system integration. The amplifier is equipped with user-adjustable controls, including variable input gain, a variable electronic crossover (HP/LP/Full Pass), and a variable bass boost, allowing for precise tuning of your audio. An auto-on feature ensures the amplifier powers up automatically when it detects a signal through the speaker-level inputs, simplifying installation. Built with sound quality in mind, the ST-4X SQ III incorporates specific internal upgrades such as premium op-amps and capacitors. This amplifier delivers a powerful output, rated at 4 x 70 watts RMS into 4 ohms, 4 x 95 watts RMS into 2 ohms, and can be bridged to provide 2 x 190 watts RMS into 4 ohms. Its frequency response spans from 15Hz to 30KHz ±1dB, ensuring faithful reproduction across a wide audio spectrum. The signal-to-noise ratio is greater than 95dB, contributing to a clean and detailed sound output with minimal noise. It also features a channel separation of greater than 60dB for distinct stereo imaging. The compact aluminum chassis measures 160mm wide, 58mm high, and 300mm deep (325mm overall length), facilitating installation in various vehicle locations.