--- product_id: 195456583 title: "Acxico 3Pcs AD828 Stereo Dynamic Microphone Preamplifier Board Pickup Module DC 3.8V-15V MIC Preamp Module" brand: "acxico" price: "£7.89" currency: GBP in_stock: true reviews_count: 8 category: "Acxico" url: https://www.desertcart.co.uk/products/195456583-acxico-3pcs-ad828-stereo-dynamic-microphone-preamplifier-board-pickup-module store_origin: GB region: United Kingdom --- # Ultra-sensitive piezo pickup Wide 3.8-15V low-voltage range Adjustable gain via resistor R5 Acxico 3Pcs AD828 Stereo Dynamic Microphone Preamplifier Board Pickup Module DC 3.8V-15V MIC Preamp Module **Brand:** acxico **Price:** £7.89 **Availability:** ✅ In Stock ## Summary > 🎤 Elevate your sound game with precision preamp power! ## Quick Answers - **What is this?** Acxico 3Pcs AD828 Stereo Dynamic Microphone Preamplifier Board Pickup Module DC 3.8V-15V MIC Preamp Module by acxico - **How much does it cost?** £7.89 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/195456583-acxico-3pcs-ad828-stereo-dynamic-microphone-preamplifier-board-pickup-module) ## Best For - acxico enthusiasts ## Why This Product - Trusted acxico brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual-Channel Design:** Two independent preamp channels for versatile stereo or mono setups with minimal crosstalk. - • **Noise-Free Operation:** No switching power supply needed—ensures interference-free, professional-grade audio. - • **Compact & Power-Efficient:** Ultra-small 2.5x1.6cm board powered by a single lithium battery or linear supply. - • **Customizable Gain Control:** Easily tweak amplification from 5k to 150k resistor for perfect sound balance. - • **Precision Piezoelectric Sensitivity:** Captures pure instrument vibrations, cutting ambient noise for crystal-clear sound. ## Overview The Acxico 3Pcs AD828 Stereo Dynamic Microphone Preamplifier Board is a compact, dual-channel preamp module designed for piezo pickups on instruments like guitars and erhus. Operating on a low voltage range of 3.8V to 15V, it features an AD828 op amp chip for high-fidelity amplification with adjustable gain via onboard resistor modification. Its design minimizes environmental noise and interference, making it ideal for professional musicians and audio enthusiasts seeking clear, customizable sound enhancement. ## Description Note: The on-board resistor R5 is adjusted by the magnification. If the magnification is not suitable, the resistance of R5 can be adjusted. It can be selected from 5k to 150k. The larger the resistance, the higher the magnification. If the plug-in resistor is used, the original chip resistor can be removed, and the plug-in resistor is soldered to the reserved pad on both ends of the original chip resistor. We highly appreciate all customers opinions to improve the selling, also if anything you unsatisfied, please contact us for probable best solution. Package Includes: 3pcs Review: Variable voltage regulator - Very easy hook up 3 wires in out and ground. Review: Sounds great with the high speed amp chip installed. - Nice sounding amplifier, used it in an acoustic guitar with a piezo sensor. Easy to change the gain by changing r5 for one channel, and r7 for the other.... gain is r5/r6, and r7/r8. Installed is 100k and 2.2k. Maintain the 2.2k and change the 100k. Has a voltage gain of 45, and a db gain of 33... ## Features - The piezoelectric ceramic piece is sensitive to the sound wave vibration transmitted by the solid, and is not sensitive to the acoustic vibration of the gas, which can effectively reduce the environmental noise and avoid the whistling caused by the self-excitation. Can be used for guitar, erhu and other musical instruments. - Ultra-small volume dynamic microphone preamplifier board,two-channel design,suitable for a single lithium battery-powered,using AD828 fever op amp chip,suitable for low voltage power supply (3.8-15V) - If you only used one channel,the other channel needs to short-circuit the input with GND,To avoid interference with the signal crosstalk. - Working voltage:DC3.8V-15V.This microphone amplifier board without power regulator circuit,can only use the battery or linear power supply,can not use switching power supply,otherwise there will be interference. - Size:2.5x1.6cm/0.98x0.63inch ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #47,422 in Musical Instruments ( See Top 100 in Musical Instruments ) #87 in Microphone Preamps | | Customer Reviews | 3.9 out of 5 stars 52 Reviews | ## Images ![Acxico 3Pcs AD828 Stereo Dynamic Microphone Preamplifier Board Pickup Module DC 3.8V-15V MIC Preamp Module - Image 1](https://m.media-amazon.com/images/I/61KTNP7MbuL.jpg) ## Questions & Answers **Q: does this circuit have dc blocking caps?** A: I don't know since I have never seen a schematic for this product. Why not, just assume none were provided and install them external to the board .... just to be safe rather than sorry ! **Q: Can this be used with an electret mic?** A: YES, but only as far as for amplification. You will need to come up with the voltage to be applied to the Mike Element. Might I mention that his board has no easy means of gain adjustment. I think there are other Pre-Amplifier boards that provide the voltage to supply the element. and pads to solder on adjustment resistors to select gain. **Q: What is the input impedance** A: Impedance is not mentioned, check out the Velleman K-1803 which was my second purchase. mono pre-amp. Works like a champ ! **Q: How do I verify operation? I have tried two different boards with two different microphones. I am not getting any output.** A: my has a heat sink under not all the board work the same waith till i get mine and try to tell a is wirwd ## Customer Reviews ### ⭐⭐⭐⭐⭐ Variable voltage regulator *by R***G on January 27, 2026* Very easy hook up 3 wires in out and ground. ### ⭐⭐⭐⭐⭐ Sounds great with the high speed amp chip installed. *by T***I on May 22, 2021* Nice sounding amplifier, used it in an acoustic guitar with a piezo sensor. Easy to change the gain by changing r5 for one channel, and r7 for the other.... gain is r5/r6, and r7/r8. Installed is 100k and 2.2k. Maintain the 2.2k and change the 100k. Has a voltage gain of 45, and a db gain of 33... ### ⭐ They don’t work. *by T***N on February 15, 2025* I ordered a tree peace set got one item twice. Seller gave me a refund. But the one peace I have doesn’t work. Yes put together correctly. I know electronics. So no money lost thanks to refund from seller. Thank you. ## Frequently Bought Together - Acxico 3Pcs AD828 Stereo Dynamic Microphone Preamplifier Board Pickup Module DC 3.8V-15V MIC Preamp Module - HiLetgo 5pcs LM386 Mini Electret Microphone Amplifier Board Microphone AMP Amplifier DC 4V-12V - 2PCS DC 5V-12V 6V 9V Micro Electret Microphone Amplifier Mini MIC Condenser Microphone Audio Amplifier Board Adjustable Gain 750mW LM386 AMP Module --- ## 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.co.uk/products/195456583-acxico-3pcs-ad828-stereo-dynamic-microphone-preamplifier-board-pickup-module](https://www.desertcart.co.uk/products/195456583-acxico-3pcs-ad828-stereo-dynamic-microphone-preamplifier-board-pickup-module) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-06*