{"product_id":"ak2515-vfd-audio-spectrum-analyzer-board-3-5mm-aux-mic-clock-display","title":"AK2515 VFD Audio Spectrum Analyzer Board – 3.5mm AUX\/MIC","description":"\u003ch2\u003eAK2515 VFD Audio Spectrum Analyzer Board with Clock Display\u003c\/h2\u003e\n\u003cp\u003eTake your audio setup to the next level with the \u003cstrong\u003eAK2515 VFD Audio Spectrum Analyzer Board\u003c\/strong\u003e. Featuring a high-resolution Vacuum Fluorescent Display (VFD) and a wide frequency range of \u003cstrong\u003e30Hz–20kHz\u003c\/strong\u003e, this compact analyzer board delivers stunning real-time visual feedback of your audio signal — perfect for DIY audio enthusiasts, home hi-fi builders, and electronics hobbyists.\u003c\/p\u003e\n\u003cp\u003eWith dual input options (3.5mm AUX line-in and a sensitive built-in MIC), multiple spectrum display modes, AGC-backed signal processing, and a precision clock display, the AK2515 is as functional as it is visually impressive. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Resolution VFD Display (25×15):\u003c\/strong\u003e Each frequency band is rendered with sharp, accurate detail using a dedicated Vacuum Fluorescent Display for a retro-futuristic look.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Frequency Coverage (30Hz–20kHz):\u003c\/strong\u003e Visualizes the full audible spectrum from deep bass to the upper limit of human hearing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Audio Input – 3.5mm AUX \u0026amp; MIC:\u003c\/strong\u003e Connect via wired audio cable (AUX) or use the onboard microphone for wireless\/ambient audio capture.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiple Spectrum Modes:\u003c\/strong\u003e Normal, inverse color, inversion, frequency division, and amplification curve modes — choose the visual style that suits you.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Display Parameters:\u003c\/strong\u003e Customize main light beam falling speed, peak holding time, peak falling speed, and brightness (7 levels).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Clock Display:\u003c\/strong\u003e Shows year, month, day, hour, minute, second, and date — doubles as a stylish desk clock.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAGC \u0026amp; Noise Filtering:\u003c\/strong\u003e Automatic Gain Control and one-click noise filtering ensure a cleaner, more accurate spectrum display.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower-Off Memory:\u003c\/strong\u003e Remembers your last display settings when powered off, so you pick up right where you left off.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4 Font Types:\u003c\/strong\u003e Personalize the clock and score display with your choice of four different fonts.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAuto Mode:\u003c\/strong\u003e Automatically switches between music spectrum display and clock mode depending on whether audio input is detected.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJVFD2517 (Narrow)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVFD (Vacuum Fluorescent Display)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 × 15\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30Hz – 20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAudio Input\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.5mm AUX \/ MIC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 5V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrightness Levels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFont Types\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAcrylic\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e175 × 28 × 50 mm \/ 6.89 × 1.10 × 1.97 in\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e189g \/ 6.67 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eDisplay \u0026amp; Operating Modes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpectrum Modes:\u003c\/strong\u003e Normal | Inverse Color | Inversion | Frequency Division | Amplification Curve\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Types:\u003c\/strong\u003e Actual Output | Smooth Output I | Smooth Output II\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSound Level Display:\u003c\/strong\u003e Normal Mode | Mirror Mode 1 | Mirror Mode 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmplification Curve Settings:\u003c\/strong\u003e Compress Low Frequency | Enhance High Frequency | Default (No Amplification) | Slightly Compress Low + Enhance High | Enhance High Frequency\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAuto Mode:\u003c\/strong\u003e Displays spectrum with audio input; switches to clock when audio is absent\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAlways-On Modes:\u003c\/strong\u003e Music Score, Clock Display, Sound Level\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× AK2515 Audio Spectrum Analyzer Board\u003c\/li\u003e\n  \u003cli\u003e1× Power Cable\u003c\/li\u003e\n  \u003cli\u003e1× 3.5mm Audio Cable\u003c\/li\u003e\n  \u003cli\u003e1× 1:2 Splitter 3.5mm Cable\u003c\/li\u003e\n  \u003cli\u003e2× Acrylic Sheets\u003c\/li\u003e\n  \u003cli\u003e1 Set× Mounting Screws\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Actual colors may vary slightly from product images due to monitor settings and lighting. Please allow minor measurement deviations (±1–2mm).\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eExplore More Electronics \u0026amp; Tools\u003c\/h3\u003e\n\u003cp\u003eYou may also enjoy these products from our store:\u003c\/p\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 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/360-bicycle-chain-cleaner-tool-gear-cleaning-kit\"\u003e360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit\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: What type of display does the AK2515 Audio Spectrum Analyzer use?\u003c\/h4\u003e\n\u003cp\u003eA: The AK2515 uses a VFD (Vacuum Fluorescent Display) with a resolution of 25×15. VFD technology produces bright, crisp characters even in well-lit environments, giving the board a premium retro aesthetic.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I use the AK2515 without connecting a cable — does it have a microphone?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The board features a built-in sensitive MIC input so it can pick up ambient audio without a wired connection. It also supports 3.5mm AUX for direct line-in from phones, PCs, amplifiers, or other audio sources.\u003c\/p\u003e\n\u003ch4\u003eQ: What voltage does the AK2515 spectrum analyzer board require?\u003c\/h4\u003e\n\u003cp\u003eA: The board operates on DC 5V, making it compatible with standard USB power supplies or power banks — easy to integrate into any desktop or DIY audio project.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the difference between the JVFD2515 (wide) and JVFD2517 (narrow) models?\u003c\/h4\u003e\n\u003cp\u003eA: Both models share the same core features and specifications. The main difference is the physical form factor: JVFD2515 (wide) has a wider profile, while JVFD2517 (narrow) is slimmer — ideal for tight enclosures or sleek panel builds.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What type of display does the AK2515 Audio Spectrum Analyzer use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The AK2515 uses a VFD (Vacuum Fluorescent Display) with a resolution of 25×15. VFD technology produces bright, crisp characters even in well-lit environments, giving the board a premium retro aesthetic.\"}}, {\"@type\": \"Question\", \"name\": \"Can I use the AK2515 without connecting a cable — does it have a microphone?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! The board features a built-in sensitive MIC input so it can pick up ambient audio without a wired connection. 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