{"product_id":"bluetooth-audio-amplifier-board-pam8403-5w-5w-dual-channel-portable","title":"Bluetooth Audio Amplifier Board PAM8403 5W+5W Dual Channel - Portable","description":"\u003cp\u003eOur review of the Bluetooth Audio Amplifier Board examines a compact PAM8403-based module aimed at DIYers and small speaker projects. The bottom line: this little board is best for hobbyists who need a rechargeable, low-voltage amplifier that supports multiple inputs and can drive two small speakers at up to 5W per channel. It stands out for its built-in Bluetooth, SD\/USB playback and 18650 battery support, which together make it a convenient, portable solution for custom desktop or bookshelf speakers.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-channel 5W+5W:\u003c\/strong\u003e Provides independent stereo output so two small speakers can be driven with clear, low-distortion sound at modest volumes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOnboard lithium battery support:\u003c\/strong\u003e Uses a single 18650 cell for portable operation and convenient recharging via the 5V Micro USB input.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple input methods:\u003c\/strong\u003e Accepts Bluetooth wireless, SD card and USB flash drive playback so sources can be switched without rewiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple front controls:\u003c\/strong\u003e Physical buttons offer volume, track skip, pause and power functions for hands-on operation without a phone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong Bluetooth range:\u003c\/strong\u003e Claimed transmission up to 20m in open space, useful for typical room setups and casual wireless listening.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto-play convenience:\u003c\/strong\u003e When powered on the board will automatically read and play from an inserted SD card or USB drive for unattended playback.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis board is aimed at electronics hobbyists, makers and small-scale speaker builders who want a low-voltage, rechargeable amplifier with flexible inputs and Bluetooth pairing. It is a practical choice for building portable Bluetooth speaker projects, refurbishing small bookshelf speakers, or adding wireless playback to existing enclosures.\u003c\/p\u003e\n\n\u003cp\u003eThose who need high power, audiophile-grade fidelity, balanced XLR inputs, or heavy-duty home theater amplification should look elsewhere; this module is optimized for convenience, portability and DIY integration rather than large-room sound or professional installations.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompact and easy to integrate into DIY speaker projects with clear labeling and simple wiring.\u003c\/li\u003e\n\u003cli\u003eMultiple playback options (Bluetooth, SD card, USB) reduce dependency on a phone or external source.\u003c\/li\u003e\n\u003cli\u003eRechargeable via 5V Micro input using a common 18650 cell for true portability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMaximum output is modest at 5W per channel, so it is not suited to large rooms or high-volume listening.\u003c\/li\u003e\n\u003cli\u003eBattery not included, so buyers must source and install a correctly polarized 18650 cell themselves.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Name\u003c\/td\u003e\n\u003ctd\u003eBluetooth Digital Amplifier Board Dual 5W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChip Model\u003c\/td\u003e\n\u003ctd\u003ePAM8403\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e5V Micro USB input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Power\u003c\/td\u003e\n\u003ctd\u003e5W + 5W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e18650 lithium battery x1 (NOT included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs\u003c\/td\u003e\n\u003ctd\u003eBluetooth, SD card, USB flash\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBluetooth Range\u003c\/td\u003e\n\u003ctd\u003eUp to 20m (no blocking)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThis PAM8403 Bluetooth amplifier board is a practical, low-cost option for makers building portable or compact stereo speakers. It offers convenient rechargeable operation, multiple input modes and straightforward controls, making it good value for DIY projects where modest power and portability matter more than high SPL or pro audio features.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the board include a battery?\u003c\/strong\u003e\u003cbr\u003eThe board requires one 18650 lithium cell but the battery is not included and must be installed separately with correct polarity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is the board powered and charged?\u003c\/strong\u003e\u003cbr\u003ePower is supplied by a single 18650 battery and the board can be recharged via the 5V Micro USB charging input.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it play without a Bluetooth source?\u003c\/strong\u003e\u003cbr\u003eYes, it supports direct playback from an inserted SD card or USB flash drive which will auto-play when the board is switched on.\u003c\/p\u003e","brand":"Thincol","offers":[{"title":"Default Title","offer_id":46781211541723,"sku":"B08GK6L4LY","price":8.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61GJQNymtGL._SL1001.jpg?v=1747855003","url":"https:\/\/gearmusthave.com\/products\/bluetooth-audio-amplifier-board-pam8403-5w-5w-dual-channel-portable","provider":"GearMustHave","version":"1.0","type":"link"}