{"product_id":"zk-st21-bluetooth-digital-amplifier-board-2-1-channel-100w-100w-200w-subwoofer-chip-tpa3221-dc12-30v-10a","title":"ZK-ST21 bluetooth Digital Amplifier Board 2.1 Channel 100W+100W+200W Subwoofer Chip TPA3221 DC12-30V 10A","description":"\u003cdiv id=\"specification\"\u003e\u003c\/div\u003e\u003cdiv id=\"specification_end\"\u003e\u003c\/div\u003e\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 18px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 18px;\"\u003eFeatures:\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e1. Adopting high-power digital power amplifier specific inductance, high current, low magnetic loss, low heat generation, using oxygen free copper wire to improve sound quality, and magnetic shielding mechanism to resist electromagnetic interference.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e2. Equipped with two TPA3221 chips, it supports 2.1 channel bluetooth digital amplifier 100W+100W+200W high-power.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e3. Subwoofer expansion port, supporting the installation of 1602 and 3002.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e4. Multiple expansion ports, capable of connecting to microphone front stage board reverb input or output, convenient to use.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e5. Equipped with protection mechanism, input undervoltage, input anti reverse connection, overheating, overcurrent, and short circuit protection.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 18px;\"\u003eSpecification:\u003c\/span\u003e\u003c\/b\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eProduct name: 2.1 channel BT amplifier board 100W+100W+200W\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eProduct model: ZK-ST21\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eAdapted power supply: The working voltage range is 12-30VDC, and it is recommended to use a DC power supply with a voltage of 24V-28V and a current of 10A or above.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eMaximum power: left or right channel—— 105W@30V , 4 Ω; 55W@30V , 8 Ω. Subwoofer—— 208W@30V 2 Ω; 105W@30V , 4 Ω. In short, the higher the voltage, the smaller the resistance, and the greater the output power.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eAdapted speakers: left and right channels, supporting speakers up to 3-8 Ω and 100W; The subwoofer supports speakers up to 2-8 Ω and 200W.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eBT chip: Jerry 5.1, transmission distance of 15 meters\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eInput method: BT+AUX+USB drive+sound card\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eNumber of channels: 2.1, left channel+right channel+subwoofer\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003ePower amplifier chip: Two TI original TPA3221\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eProtection mechanism: Input undervoltage, input anti reverse connection, overheating, overcurrent, short circuit protection.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eProduct size: 121x100x25mm\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"font-size: 18px;\"\u003ePackage include:\u003c\/span\u003e\u003c\/b\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eSet 1:\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e1 x ST21 amplifier board\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e1 x Shell kit\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eor\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eSet 2:\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e1 x ST21 amplifier board\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e5 x Lead wire\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eAttention:\u003c\/b\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eInstall external antenna (special scenario):\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003ea. The boards are all equipped with onboard antennas, with a normal distance of 10-15 meters. If they are installed in a metal shell (which will block the signal) or increase the bluetooth distance (20-30 meters), external antennas will be used.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/p\u003e\u003cp class=\"MsoNormal\"\u003eb. Customers are required to purchase 2.4G antennas (antenna extension cables, antenna rods) on their own, and this product does not include external antennas.\u003cspan style=\"mso-spacerun:'yes';font-family:宋体;mso-ascii-font-family:Calibri;\u0026lt;br\u0026gt;mso-hansi-font-family:Calibri;mso-bidi-font-family:'Times New Roman';font-size:10.5000pt;\u0026lt;br\u0026gt;mso-font-kerning:1.0000pt;\"\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"ontproduct","offers":[{"title":"Default Title","offer_id":49120025313505,"sku":"BG-2025434","price":210.52,"currency_code":"HKD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0853\/9317\/8849\/files\/4979c918-1b1e-4f9c-89d6-d1b995e4f792.jpg?v=1789396424","url":"https:\/\/ontproduct.com\/products\/zk-st21-bluetooth-digital-amplifier-board-2-1-channel-100w-100w-200w-subwoofer-chip-tpa3221-dc12-30v-10a","provider":"OntProduct","version":"1.0","type":"link"}