AK2515 VFD Audio Spectrum Analyzer Board – 3.5mm AUX/MIC
AK2515 VFD Audio Spectrum Analyzer Board – 3.5mm AUX/MIC
AK2515 VFD Audio Spectrum Analyzer Board with Clock Display
Take your audio setup to the next level with the AK2515 VFD Audio Spectrum Analyzer Board. Featuring a high-resolution Vacuum Fluorescent Display (VFD) and a wide frequency range of 30Hz–20kHz, 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.
With 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.
Key Features
- High-Resolution VFD Display (25×15): Each frequency band is rendered with sharp, accurate detail using a dedicated Vacuum Fluorescent Display for a retro-futuristic look.
- Wide Frequency Coverage (30Hz–20kHz): Visualizes the full audible spectrum from deep bass to the upper limit of human hearing.
- Dual Audio Input – 3.5mm AUX & MIC: Connect via wired audio cable (AUX) or use the onboard microphone for wireless/ambient audio capture.
- Multiple Spectrum Modes: Normal, inverse color, inversion, frequency division, and amplification curve modes — choose the visual style that suits you.
- Adjustable Display Parameters: Customize main light beam falling speed, peak holding time, peak falling speed, and brightness (7 levels).
- Precision Clock Display: Shows year, month, day, hour, minute, second, and date — doubles as a stylish desk clock.
- AGC & Noise Filtering: Automatic Gain Control and one-click noise filtering ensure a cleaner, more accurate spectrum display.
- Power-Off Memory: Remembers your last display settings when powered off, so you pick up right where you left off.
- 4 Font Types: Personalize the clock and score display with your choice of four different fonts.
- Auto Mode: Automatically switches between music spectrum display and clock mode depending on whether audio input is detected.
Technical Specifications
| Model | JVFD2517 (Narrow) |
| Display Type | VFD (Vacuum Fluorescent Display) |
| Resolution | 25 × 15 |
| Frequency Range | 30Hz – 20kHz |
| Audio Input | 3.5mm AUX / MIC |
| Operating Voltage | DC 5V |
| Brightness Levels | 7 |
| Font Types | 4 |
| Material | Acrylic |
| Size | 175 × 28 × 50 mm / 6.89 × 1.10 × 1.97 in |
| Net Weight | 189g / 6.67 oz |
| Origin | Made in Mainland China |
Display & Operating Modes
- Spectrum Modes: Normal | Inverse Color | Inversion | Frequency Division | Amplification Curve
- Output Types: Actual Output | Smooth Output I | Smooth Output II
- Sound Level Display: Normal Mode | Mirror Mode 1 | Mirror Mode 2
- Amplification Curve Settings: Compress Low Frequency | Enhance High Frequency | Default (No Amplification) | Slightly Compress Low + Enhance High | Enhance High Frequency
- Auto Mode: Displays spectrum with audio input; switches to clock when audio is absent
- Always-On Modes: Music Score, Clock Display, Sound Level
Package Contents
- 1× AK2515 Audio Spectrum Analyzer Board
- 1× Power Cable
- 1× 3.5mm Audio Cable
- 1× 1:2 Splitter 3.5mm Cable
- 2× Acrylic Sheets
- 1 Set× Mounting Screws
Note: Actual colors may vary slightly from product images due to monitor settings and lighting. Please allow minor measurement deviations (±1–2mm).
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Frequently Asked Questions
Q: What type of display does the AK2515 Audio Spectrum Analyzer use?
A: 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.
Q: Can I use the AK2515 without connecting a cable — does it have a microphone?
A: 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.
Q: What voltage does the AK2515 spectrum analyzer board require?
A: 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.
Q: What is the difference between the JVFD2515 (wide) and JVFD2517 (narrow) models?
A: 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.