{"product_id":"tpa3118-bluetooth-stereo-digital-amplifier-board-45w-12v-28v","title":"TPA3118 Bluetooth Stereo Amplifier Board 45W×2 | 12V–28V","description":"\n\u003ch2\u003eTPA3118 Bluetooth Stereo Digital Power Amplifier Board – 45W×2\u003c\/h2\u003e\n\u003cp\u003eUpgrade your audio project with this compact yet powerful \u003cstrong\u003eTPA3118 Stereo Digital Amplifier Board\u003c\/strong\u003e. Delivering an impressive \u003cstrong\u003e45W per channel\u003c\/strong\u003e (90W total), this dual-channel amp module supports both \u003cstrong\u003eBluetooth wireless audio\u003c\/strong\u003e and a \u003cstrong\u003e3.5mm AUX input\u003c\/strong\u003e, making it ideal for DIY speaker builds, home audio systems, and custom electronics projects. With a wide supply voltage range of \u003cstrong\u003eDC 12V to 28V\u003c\/strong\u003e, it works seamlessly with everything from 12V car batteries to 24V bench power supplies.\u003c\/p\u003e\n\n\u003cp\u003eBuilt around the reliable \u003cstrong\u003eTPA3118 chip\u003c\/strong\u003e, this board features multiple built-in protection mechanisms — overvoltage, undervoltage, overtemperature, DC detection, and short-circuit protection — so your speakers and components stay safe under demanding conditions. Bluetooth input takes priority by default, with automatic failover to AUX when no Bluetooth device is connected.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e🔊 \u003cstrong\u003eChip:\u003c\/strong\u003e TPA3118 Class-D digital amplifier\u003c\/li\u003e\n  \u003cli\u003e⚡ \u003cstrong\u003eOutput Power:\u003c\/strong\u003e 45W × 2 (stereo, two-channel)\u003c\/li\u003e\n  \u003cli\u003e🔋 \u003cstrong\u003eSupply Voltage:\u003c\/strong\u003e DC 12V – 28V (wide-range compatible)\u003c\/li\u003e\n  \u003cli\u003e📶 \u003cstrong\u003eAudio Input:\u003c\/strong\u003e Bluetooth (priority) + 3.5mm AUX\u003c\/li\u003e\n  \u003cli\u003e🔌 \u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e 4–8 Ω speaker compatible\u003c\/li\u003e\n  \u003cli\u003e🛡️ \u003cstrong\u003eProtection:\u003c\/strong\u003e Overvoltage \/ undervoltage \/ overtemperature \/ DC detection \/ short circuit\u003c\/li\u003e\n  \u003cli\u003e📐 \u003cstrong\u003eCompact Size:\u003c\/strong\u003e 71 × 52 × 13 mm — perfect for tight enclosures\u003c\/li\u003e\n  \u003cli\u003e🆕 \u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × TPA3118 Bluetooth Stereo Amplifier Board\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY bookshelf and desktop speaker builds\u003c\/li\u003e\n  \u003cli\u003eHome audio system upgrades\u003c\/li\u003e\n  \u003cli\u003e12V or 24V powered audio applications\u003c\/li\u003e\n  \u003cli\u003eCustom electronics and maker projects\u003c\/li\u003e\n  \u003cli\u003eReplacing worn-out amplifier boards\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge – DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/clip-on-car-fan-led-display-199-speeds-usb-type-c\"\u003eClip-On Car Fan LED Display 199 Speeds | USB \u0026amp; Type-C\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.energystar.gov\/products\" target=\"_blank\" rel=\"noopener\"\u003eENERGY STAR product efficiency guidance\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What voltage range does the TPA3118 amplifier board support?\u003c\/h4\u003e\n\u003cp\u003eA: The TPA3118 digital amplifier board supports a wide input voltage range of \u003cstrong\u003eDC 12V to 28V\u003c\/strong\u003e, making it compatible with standard 12V, 19V, and 24V power supplies as well as 12V car or motorcycle batteries.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this amplifier board have Bluetooth built in?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The board features integrated \u003cstrong\u003eBluetooth wireless audio input\u003c\/strong\u003e. Bluetooth is set as the default priority input. When no Bluetooth device is connected, the board automatically switches to the \u003cstrong\u003e3.5mm AUX input\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What speaker impedance is compatible with this amp board?\u003c\/h4\u003e\n\u003cp\u003eA: This amplifier board is designed for speakers with an impedance of \u003cstrong\u003e4 to 8 ohms\u003c\/strong\u003e. It delivers up to \u003cstrong\u003e45W per channel\u003c\/strong\u003e in stereo two-channel configuration for a total of 90W output power.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What protection features does the TPA3118 chip provide?\u003c\/h4\u003e\n\u003cp\u003eA: The TPA3118 chip includes comprehensive built-in protection: \u003cstrong\u003eovervoltage, undervoltage, overtemperature, DC detection, and short-circuit protection\u003c\/strong\u003e, ensuring safe and reliable operation for your speakers and connected components.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What voltage range does the TPA3118 amplifier board support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The TPA3118 digital amplifier board supports a wide input voltage range of DC 12V to 28V, making it compatible with standard 12V, 19V, and 24V power supplies as well as 12V car or motorcycle batteries.\"}}, {\"@type\": \"Question\", \"name\": \"Does this amplifier board have Bluetooth built in?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! 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