{"product_id":"max98357a-3w-5v-i2s-class-d-amplifier-filterless-module-for-esp32-arduino-raspberry-pi-diy-audio-speaker","title":"MAX98357A 3W 5V I2S Class D Amplifier Filterless Module for ESP32 Arduino Raspberry Pi DIY Audio Speaker","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eAmplifier Class\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eClass D (Filterless)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNullLab\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eChoice\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eyes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFrequency Response\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e20Hz ~ 20kHz\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh-concerned chemical\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003enone\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eInput Interface\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eI2S \/ PCM\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eModel Number\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMAX98357A\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOperating Temperature\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e-40°C ~ +85°C\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOperating Voltage\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e2.5V ~ 5.5V\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOrigin\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMainland China\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOutput Power\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e3W (into 4Ω load)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003ePackage Type\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eQFN (Ultra-compact package)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSampling Rate Support\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e8kHz ~ 96kHz\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eTotal Harmonic Distortion (THD+N)\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e0.1% (typical)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eType\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eSpeaker\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eis_customized\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eYes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cdiv class=\"document\"\u003e\u003cdiv class=\"section\"\u003e\n\u003cp\u003e\u003cspan style=\"font-size:18px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eThis amplifier takes digital audio directly through the I2S interface, converts it to PWM inside the chip, and drives the speaker with Class D efficiency. The signal never leaves the digital domain, so you get pristine audio free from analog noise and interference. \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size:20px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003ePoints\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cspan style=\"font-family:arial, helvetica, sans-serif\"\u003e●\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003e\u003cspan style=\"font-family:arial, helvetica, sans-serif\"\u003eFilterless Class D Amplifier: \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cspan style=\"font-family:arial, helvetica, sans-serif\"\u003ePowered by MAX98357A chip, directly drives speakers without external LC filter\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e●\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eI2S Digital Audio Input:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e Accepts digital signals directly, no external DAC needed — only 3 signal wires required for audio transmission\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e●\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003e3W Output Power:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e Delivers up to 3W into a 4Ω load for ample volume\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e●\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eHigh-Fidelity Audio: \u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e90dB SNR and low THD+N of 0.1% for clear,Purity sound quality\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e●\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eWide Voltage Compatibility: \u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e2.5V ~ 5.5V operating range, compatible with both 3.3V and 5V systems\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e●\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eHigh Efficiency, Low Heat:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e Class D efficiency up to 90%+, no extra heat sink required\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e●\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eCompatible with Mainstream Boards:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e Works with ESP32, Arduino, Raspberry Pi and other I2S-enabled devices\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e●\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eIncludes 2831 Speaker:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e Ready to use out of the box — no need to purchase a separate speaker\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-size:20px;font-family:arial, helvetica, sans-serif\"\u003eApplications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e●Bluetooth speakers \/ Smart voice devices\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e●IoT voice alerts (doorbells, alarms, voice announcements)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e●Robot speech output\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e●Smart home audio feedback\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e●DIY desktop audio systems\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e●Interactive installations \/ Maker education projects\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size:20px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eImportant Notes\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003e1.Speaker Impedance: \u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003eSupports 4Ω and higher dynamic speakers. Cannot be used as a preamplifier.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003e2.Power Supply Voltage:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e 5V supply delivers maximum 3W output; output power decreases with 3.3V supply.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003e3.ESD Protection:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e Touching the board with bare hands may damage components. ESD-safe handling is recommended.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size:20px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"font-size:20px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003e1 Set\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"document\"\u003e\u003cdiv class=\"section\"\u003e\u003cp\u003e\u003cspan style=\"font-family:arial, helvetica, sans-serif\"\u003e2831 Speaker × 1\u003c\/span\u003e\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"document\"\u003e\u003cdiv class=\"section\"\u003e\n\u003cp\u003e\u003cspan style=\"font-family:arial, helvetica, sans-serif\"\u003eMAX98357A I2S Amplifier Module × 1\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family:arial, helvetica, sans-serif\"\u003ePH2.0-4Pin to Dupont Cable × 1\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family:arial, helvetica, sans-serif\"\u003eLego Compatible Brick Base × 1\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"font-size:20px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003e2 Set\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family:arial, helvetica, sans-serif\"\u003e2831 Speaker × 2\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family:arial, helvetica, sans-serif\"\u003eMAX98357A I2S Amplifier Module × 2\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family:arial, helvetica, sans-serif\"\u003ePH2.0-4Pin to Dupont Cable × 2\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family:arial, helvetica, sans-serif\"\u003eLego Compatible Brick Base × 2\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sca68740a684741589a3668b0e32c7e1fi.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S1ab6c654f1f04881bc394248b7856659A.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S228ea03eff8049c1b35f301997f41a5fq.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size:20px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eQ: Do I need an external filter capacitor?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003eA: No. The MAX98357A uses filterless Class D technology and can drive speakers directly.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eQ: Does it support stereo?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003eA: The chip is mono output. The module defaults to stereo mixing mode.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eQ: Can it run on battery power?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003eA: Yes. Operating voltage range is 2.5V ~ 5.5V, compatible with lithium battery power.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eQ: No sound from the speaker — how to troubleshoot?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003eA: ① Check that power supply is normal; ② Verify I2S connections (BCLK\/LRC\/DIN) are correct; ③ Confirm the I2S sample rate in your code is within 8kHz ~ 96kHz.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eQ: What if there's distortion at maximum volume?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003eA: Check if your power supply is adequate (5V\/1A or higher recommended). You can also try reducing gain via the GAIN pin.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eQ: What is the operating temperature range?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size:16px;font-family:arial, helvetica, sans-serif\"\u003eA: -40°C ~ +85°C, suitable for most indoor and outdoor applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Yoeruyo","offers":[{"title":"1 Set","offer_id":55374456357163,"sku":"14:771#1 Set","price":22.64,"currency_code":"USD","in_stock":true},{"title":"2 Set","offer_id":55374456389931,"sku":"14:193#2 Set","price":60.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1000\/5744\/8747\/files\/S64a76e5c73d7442b882851db8d49e934v.webp?v=1788325740","url":"https:\/\/yoeruyo.com\/products\/max98357a-3w-5v-i2s-class-d-amplifier-filterless-module-for-esp32-arduino-raspberry-pi-diy-audio-speaker","provider":"Yoeruyo","version":"1.0","type":"link"}