{"product_id":"pt2399-karaoke-reverb-amplifier-board-dual-ac12v-diy-pcb-module","title":"PT2399 Karaoke Reverb Amplifier Board – Dual AC12V DIY PCB","description":"\n\u003ch2\u003ePT2399 Karaoke Reverb Amplifier Board — Dual AC12V DIY PCB Module\u003c\/h2\u003e\n\u003cp\u003eTake your home karaoke setup or DIY audio project to the next level with this \u003cstrong\u003ePT2399-based Karaoke Reverberation Amplifier Board\u003c\/strong\u003e. Designed for electronics enthusiasts and audio hobbyists, this compact PCB module delivers professional-grade digital reverb and microphone mixing in a ready-to-wire format. Running on a dual AC12V power supply, it integrates seamlessly into custom amplifier builds, home karaoke systems, and maker projects.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePT2399 Digital Echo Chip:\u003c\/strong\u003e Industry-standard chip for clean, natural-sounding reverberation and echo effects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Microphone Inputs (MIC1 \u0026amp; MIC2):\u003c\/strong\u003e Connect two microphones simultaneously — standard connectors plug in directly, no adapter needed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStereo Audio I\/O:\u003c\/strong\u003e Separate Left\/Right channel inputs (Lin \/ Rin) and outputs (Lout \/ Rout) with ground connections for clean stereo signal handling.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4 Adjustable Control Knobs:\u003c\/strong\u003e\n    \u003cul\u003e\n      \u003cli\u003e🎵 \u003cstrong\u003eMusic Volume:\u003c\/strong\u003e Adjust background music \/ accompaniment level\u003c\/li\u003e\n      \u003cli\u003e🎤 \u003cstrong\u003eMicrophone Volume:\u003c\/strong\u003e Set microphone output level\u003c\/li\u003e\n      \u003cli\u003e🔊 \u003cstrong\u003eReverb Depth:\u003c\/strong\u003e Control the intensity of the reverb effect\u003c\/li\u003e\n      \u003cli\u003e⏱ \u003cstrong\u003eReverberation Time:\u003c\/strong\u003e Dial in short room echo or long hall-style reverb\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual AC12V Power Supply:\u003c\/strong\u003e Requires a dual AC12V transformer — delivers stable, low-noise performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e 100 × 57 × 17 mm — fits easily into custom enclosures and DIY amplifier builds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLine-Level Output:\u003c\/strong\u003e Requires a downstream power amplifier stage — ideal for integration into larger audio systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNew Condition, High-Quality PCB:\u003c\/strong\u003e No high-concern chemicals; clean, reliable construction.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEcho Chip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePT2399\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDual AC12V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMicrophone Inputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 × MIC (MIC1, MIC2)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAudio Channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStereo (Left \u0026amp; Right)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBoard Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 × 57 × 17 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLine-level (requires power amplifier stage)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWiring Guide\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLin \/ GND \/ Rin:\u003c\/strong\u003e Left channel audio input, ground, and right channel audio input\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLout \/ GND \/ Rout:\u003c\/strong\u003e Left channel audio output, ground, and right channel audio output\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMIC1 \/ MIC2:\u003c\/strong\u003e Direct microphone connector ports — plug your microphone connectors straight in\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho Is This For?\u003c\/h3\u003e\n\u003cp\u003eThis board is perfect for \u003cstrong\u003eDIY electronics makers, audio engineers, and karaoke enthusiasts\u003c\/strong\u003e who want to build or upgrade their own karaoke amplifier system. Whether you're building a standalone karaoke machine, integrating reverb into a PA system, or experimenting with audio circuits, the PT2399 reverb board provides a flexible, high-quality starting point.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/cordless-rechargeable-milk-frother-coffee-foam-egg-whisk\"\u003eCordless Rechargeable Milk Frother – Coffee Foam \u0026amp; Egg Whisk\u003c\/a\u003e\u003c\/li\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 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Does this PT2399 karaoke reverb board work on its own as a complete amplifier?\u003c\/h4\u003e\n\u003cp\u003eA: No — this PCB is a microphone mixing and reverberation module that outputs a line-level signal. It requires a downstream power amplifier stage to drive speakers. It is designed to be integrated into a larger DIY audio or karaoke amplifier system.\u003c\/p\u003e\n\u003ch4\u003eQ: What power supply does the karaoke reverb board require?\u003c\/h4\u003e\n\u003cp\u003eA: The board requires a dual AC12V power supply (a centre-tapped transformer with dual AC12V outputs). A standard DC adapter will not work — you need an AC transformer matched to its dual AC12V specification.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I connect two microphones at the same time to this reverb board?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The board features two dedicated microphone inputs (MIC1 and MIC2), allowing two microphones to be connected and used simultaneously — great for duet karaoke sessions or dual-presenter setups.\u003c\/p\u003e\n\u003ch4\u003eQ: What does the PT2399 chip do in this karaoke amplifier module?\u003c\/h4\u003e\n\u003cp\u003eA: The PT2399 is a widely used digital echo and delay chip that processes the microphone signal to produce smooth, natural-sounding reverb and echo effects. It gives your voice a full, room-filling quality during karaoke performances.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Does this PT2399 karaoke reverb board work on its own as a complete amplifier?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — this PCB is a microphone mixing and reverberation module that outputs a line-level signal. 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