Description
<h3>ZK-HT21 540W 2.1 Channel Bluetooth 5.0 High Power Amplifier Board</h3>
<p>The ZK-HT21 is an audiophile-grade high-power 2.1 channel digital audio amplifier designed for ultimate DIY home theaters, DJ party speakers, and massive heavy-bass sound systems. Powered by dual high-efficiency TDA7498E amplifier chips, this board delivers crystal-clear audio with thunderous low-frequency bass.</p>
<h4>Key Features:</h4>
<ul>
<li><strong>Massive 540W Output:</strong> Drives two heavy satellite speakers (160W each) and a dedicated high-power subwoofer (220W).</li>
<li><strong>5-Knob Precision Equalizer:</strong> Dedicated hardware knobs for Master Volume, Subwoofer Frequency, Subwoofer Volume, Stereo Treble, and Stereo Bass.</li>
<li><strong>Multiple Audio Sources:</strong> High-speed Bluetooth 5.0 connection, 3.5mm AUX line-in, and direct USB drive plug-and-play music playback.</li>
<li><strong>Active Silent Fan Cooling:</strong> Integrated dynamic ultra-silent cooling fan with a custom aluminum heat sink ensures long hours of distortion-free high-volume performance.</li>
<li><strong>Full Protection Circuit:</strong> Built-in protection against over-voltage, under-voltage, overheating, DC detection, and short-circuit.</li>
</ul>
<h4>Technical Specifications:</h4>
<ul>
<li><strong>Model:</strong> ZK-HT21</li>
<li><strong>Amplifier Chip:</strong> TDA7498E Dual Class-D</li>
<li><strong>Power Supply Range:</strong> 15V – 36V DC (5.5×2.1mm DC plug / Terminal Block)</li>
<li><strong>Compatible Speaker Impedance:</strong> Left & Right Channels: 4Ω – 8Ω (up to 160W) | Subwoofer: 3Ω – 8Ω (up to 220W)</li>
<li><strong>Package Contents:</strong> 1x ZK-HT21 Amplifier Board, Top & Bottom Acrylic/Metallic Shell Panels, 5x Knobs, Screwdriver, Brass Standoffs, and Screws.</li>
</ul>
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