--- product_id: 639026526 title: "Douk Audio Plastic Nobsound Music Spectrum Audio 15 Level Indicator VU Meter Screen Amplifier VFD LED Display (PJ454)" brand: "douk audio" price: "$299.94" currency: USD in_stock: true reviews_count: 8 category: "Douk Audio" url: https://www.desertcart.ec/products/639026526-douk-audio-plastic-nobsound-music-spectrum-audio-15-level-indicator store_origin: EC region: Ecuador --- # ±3.8ppm ultra-precise clock 20Hz-20KHz frequency range 25×15 high-res VFD display Douk Audio Plastic Nobsound Music Spectrum Audio 15 Level Indicator VU Meter Screen Amplifier VFD LED Display (PJ454) **Brand:** douk audio **Price:** $299.94 **Availability:** ✅ In Stock ## Summary > 🎵 Elevate your sound game with precision and style — don’t just listen, visualize! ## Quick Answers - **What is this?** Douk Audio Plastic Nobsound Music Spectrum Audio 15 Level Indicator VU Meter Screen Amplifier VFD LED Display (PJ454) by douk audio - **How much does it cost?** $299.94 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/639026526-douk-audio-plastic-nobsound-music-spectrum-audio-15-level-indicator) ## Best For - douk audio enthusiasts ## Why This Product - Trusted douk audio brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Visualizer:** Experience crystal-clear 25×15 VFD display for every frequency band with unmatched accuracy. - • **Full-Spectrum Mastery:** Seamlessly covers 20Hz-20KHz range, capturing every subtle audio nuance via AUX or MIC input. - • **Adaptive Display Modes:** Choose from 3 sound level modes and 5 spectrum styles to match your vibe and environment. - • **Smart Clock Integration:** Built-in ultra-precise clock with multiple display fonts and power-off memory keeps you on time and in style. - • **Customizable Audio Dynamics:** Fine-tune gain, brightness, peak hold, and noise filtering for a personalized, flawless visual soundscape. ## Overview The Douk Audio Nobsound PJ454 is a sleek, high-resolution VFD music spectrum analyzer and clock display, supporting a full 20Hz-20KHz frequency range. Featuring multiple customizable display and amplification modes, it offers wired and wireless input options with 3.5mm AUX and MIC, precise clock functionality, and advanced noise filtering — perfect for audiophiles and professionals craving real-time, visually stunning audio feedback. ## Description Parameters Display screen: VFD (Vacuum Fluorescent Display) Resolution: 25 × 15 Frequency range supported: 32Hz-20KHz Display item: music spectrum / sound level / clock Audio signal input: 3.5mm AUX / MIC Work mode: 1. Auto mode (display music spectrum when music input, display clock mode when no music input) 2. Auto mode without clock display (display music spectrum when music input, enter deep sleep mode when no music input) 3. Music spectrum mode (always) 4. Clock display mode (always) Sound level display mode: 3 kinds 1. Normal mode 2. Mirror mode 1 3. Mirror mode 2 Amplification curve settings: 5 modes 1. Compressed low-frequency 2. Compressed low-frequency to enhance high frequency 3. No enlarging(default setting) 4. Slightly compression low frequency to enhances high frequency 5. Enhance high frequency Music spectrum mode: Normal mode / Invert color mode / Reverse mode / Frequency division mode / Amplified curve mode Real output / Smooth output I / Smooth output II Adjustable items: main light column falling speed / peak holding time / peak falling speed Clock display: year / month / day / hour / minute / second & date Brightness adjustment: 7 levels Font type: 4 kinds Working voltage: DC 5V Dimensions(W*D*H): 175*28*50mm / 6.89*1.10*1.97in Net weight: 189g/1.42lb Package weight: 300g/0.66lb Packing List 1× AK2515 Audio Spectrum Analyzer Board 1× USB Cable (Type-C) 1× 3.5mm Audio Cable 1× 1:2 3.5mm Cable 2× Acrylic Board 1 Set × Installation Screws Review: Nice product - प्रोडक्ट अच्छा हे लेकिन सेटिंग थोड़ी मुश्किल कंपानी को सेटिंग करके भेजना चाहिए मेरे प्रोडक्ट में ऑडियो इन करने के बाद भी वौइस् पर रियेक्ट कर रहा हे क्या ये पर9डक्ट का प्रॉब्लम हे या सेटिंग करनी पड़ेगी Review: Excellent product. Must for audiophiles. - Working absolutely well. Easy to assemble. ## Features - Accurate music spectrum analyzer & clock display: adopts dedicated VFD display screen with 25 × 15 high resolution, guaranteeing the accuracy of each frequency band. Also with a high-precision clock display, using SD3078 built-in crystal oscillator which can enWide frequency range display & 3.5mm AUX/MIC input: support 20Hz-20KHz frequency sweep, high-precision display even can do frequency point tesure that the clock accuracy is ±3.8ppm, month error within 10 seconds, very cool and interesting. - Wide frequency range display & 3.5mm AUX/MIC input: support 20Hz-20KHz frequency sweep, high-precision display even can do frequency point test. With a 3.5mm AUX and sensitive MIC pick-up, perfectly achieve wired and wireless connections, you can easily see every subtle change in sound. - Special AGC and spectrum algorithm & customized output curve: ensure ideal visual effects even the input signal is in a small to large range, even can switch the gain between -10/-5/-3/-1/0dB. With 3 kinds of display modes: real output / smooth output I / smooth output II, both ensure accuracy and best display effects, satisfy different usage requirements. - Many adjustable items & display effects: the brightness, the falling speed of main light column, the holding time and the falling speed of the peak can be adjusted separately. Supports displaying date and time, 4 fonts, 5 music spectrum display modes, 5 clock display modes, and 3 level modes for free selection, all settings with power-off memory function, no need to set it again after restarting. - Frequency division/amplification curve function and noise filtering: 5 frequency division modes can make the visual effect better; 5 amplification curve modes can suppress low-frequency or boost high-frequency. With one click noise filtering function, effectively improves the clarity of sound, and is well-adapted for use in different environments. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07BRSSR8H | | Best Sellers Rank | #336,051 in Electronics ( See Top 100 in Electronics ) #567 in Hi-Fi Amplifiers | | Brand | Douk Audio | | Brand Name | Douk Audio | | Customer Reviews | 4.4 out of 5 stars 273 Reviews | | Manufacturer | Nobsound | | Material Type | Plastic | | Maximum Supply Voltage | 5 Volts | | Minimum Supply Voltage | 5 Volts | | Model Number | PJ454_US | | Mounting Type | Surface Mount | | Number of Channels | 15 | | Package Type Name | box | | Part Number | PJ454_US | | Specification Met | FCC | | Unit Count | 1 Count | | Voltage | 38 Volts | ## Product Details - **Voltage:** 5 Volts (DC) - **Manufacturer:** Nobsound - **Maximum Supply Voltage:** 5 Volts - **Minimum Supply Voltage:** 5 Volts - **Mounting Type:** Surface Mount ## Images ![Douk Audio Plastic Nobsound Music Spectrum Audio 15 Level Indicator VU Meter Screen Amplifier VFD LED Display (PJ454) - Image 1](https://m.media-amazon.com/images/I/81XOG0NpT7L.jpg) ![Douk Audio Plastic Nobsound Music Spectrum Audio 15 Level Indicator VU Meter Screen Amplifier VFD LED Display (PJ454) - Image 2](https://m.media-amazon.com/images/I/81VJd5lbEAL.jpg) ![Douk Audio Plastic Nobsound Music Spectrum Audio 15 Level Indicator VU Meter Screen Amplifier VFD LED Display (PJ454) - Image 3](https://m.media-amazon.com/images/I/71f15IFVrDL.jpg) ![Douk Audio Plastic Nobsound Music Spectrum Audio 15 Level Indicator VU Meter Screen Amplifier VFD LED Display (PJ454) - Image 4](https://m.media-amazon.com/images/I/81WTlqBacYL.jpg) ![Douk Audio Plastic Nobsound Music Spectrum Audio 15 Level Indicator VU Meter Screen Amplifier VFD LED Display (PJ454) - Image 5](https://m.media-amazon.com/images/I/81S+WXwiUIL.jpg) ## Questions & Answers **Q: Is this plug and play unit?** A: Hello. Yes. It is a finished product. You only need to connect signal input and power input. **Q: The clock is very annoying! Any way to disable it, so it only acts as a spectrum display? Thanks** A: Disconnect from headphone jack when not in use. **Q: when plugged in to a audio source, Ii have 2 or 3 bars flickering like there picking up some interference. any solutions?** A: Got something similar happening with many bands even when there is minimal audio input. The problem appears to be a poor connection between the 1/8" plug and the socket on the analyser. What I have done is remove the plug, clean it, re-insert it and check. If that doesn't immediately solve the issue, I twist the plug in the socket until I get it to a position that zero input registers nothing on the analyser. **Q: What are the unit's dimensions?** A: 7" x 2" x 1" ## Customer Reviews ### ⭐⭐⭐⭐⭐ Nice product *by J***H on 29 June 2025* प्रोडक्ट अच्छा हे लेकिन सेटिंग थोड़ी मुश्किल कंपानी को सेटिंग करके भेजना चाहिए मेरे प्रोडक्ट में ऑडियो इन करने के बाद भी वौइस् पर रियेक्ट कर रहा हे क्या ये पर9डक्ट का प्रॉब्लम हे या सेटिंग करनी पड़ेगी ### ⭐⭐⭐⭐⭐ Excellent product. Must for audiophiles. *by R***R on 25 May 2025* Working absolutely well. Easy to assemble. ### ⭐⭐⭐⭐⭐ Excellent Product!!! *by M***U on 3 April 2025* Very Good and Nice Product ## Frequently Bought Together - Nobsound AK2515 Pro Audio Spectrum Analyzer with VFD Display, MIC Input & Advanced AGC - Precise Sound Level Meter for Musicians and Audio Enthusiasts - Amazon Basics 3.5mm Stereo Aux to 2 x RCA Audio Cable Adapters, 4 Feet/1.2 m, for Connecting Amplifiers, Speakers, with Gold-Plated Plugs, Black --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ec/products/639026526-douk-audio-plastic-nobsound-music-spectrum-audio-15-level-indicator](https://www.desertcart.ec/products/639026526-douk-audio-plastic-nobsound-music-spectrum-audio-15-level-indicator) --- *Product available on Desertcart Ecuador* *Store origin: EC* *Last updated: 2026-06-04*