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4CH 4X1200W Class H Power Amplifier Outdoor Karaoke Sound Audio System. High Power Output: 4x1200W stereo or 2400W bridge mono at 8 ohms. Wide Frequency Response: 20Hz to 30KHz with +/-0.5dB accuracy. Advanced Protection: Protects against short circuit, overload, overheating, DC, and ultrasonic issues. Temperature Controlled Cooling: Equipped with 2 PCS fans for efficient heat management. Low Distortion: Signal to noise ratio of 110dB and total harmonic distortion under rated power. Versatile Input Options: Combo XLR and 3Pin Male connectors for balanced and unbalanced signals. Global Certification: Products passed CE and RoHS certifications. Flexible Customization: Offers full, minor, and sample-based customization options.