Acxico 3Pcs AD828 Stereo Dynamic Microphone Preamplifier Board Pickup Module DC 3.8V-15V MIC Preamp Module
Key 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
Acxico 3Pcs AD828 Stereo Dynamic Microphone Preamplifier Board Pickup Module DC 3.8V-15V MIC Preamp Module
List Price: $14.53$13.08DEALYou Save: $1.45 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 22, 2026In Stock (1)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers4.1
out of 5
Based on 5 reviews
5★
80%
4★
20%
3★
0%
2★
0%
1★
0%
Worked great to amplify a Piezoelectric microphone
Mentalic.✓ Verified Purchase•January 22, 2024
Worked great to amplify a Piezoelectric microphone to usable level as input to audio amp.
Not their fault they weren't what I needed.
Robert T.✓ Verified Purchase•November 9, 2023
I bought these little preamps for a DIY project I'd been thinking about, but wasn't sure if I wanted to go stereo, or use a similar LM386-based mono preamp. This 828 board worked as advertised. Stereo in was no problem; stereo out the same. I did run into a situation picking up an AM radio station, but I'll admit it was something I'd done wrong (likely a simple shielding mistake). Ultimately, the 386 amp worked properly, and I didn't need true stereo anyway, so I went with it instead. This is still a great little board if you absolutely need to preamp a true stereo input. I recommend them, but probably won't need them again.
Did the job for making an electret mic amp. Added 10K pullup to +input at the pin.
Lee&ChrisStudley✓ Verified Purchase•November 3, 2023
Did the job for making an electret mic amp. Added 10K pullup to +input at the pin.
Worked for piezo pickup for bass.
KH✓ Verified Purchase•September 17, 2023
I used these as a pizeo buffer/ preamp for my bass guitar build. They would also work for a guitar.
I combined them with Fishman style pickups that use a 2.5mm plug to connect, so I had to do some creative wiring to make them work for my application.
The wiring is straightforward, they are stereo, so one signal wire from a pair of pizeos goes to left (marked L) the other signal wire goes to right (marked R) and both ground wires are combined to the ground connector (marked G). If you're using this mono, you need to short the unused input to ground.
On the output side, if you're not using stereo, you need to mix the channels which can be done with a 100K Ohm resistor wired to each output. If using them mono, only the input needs shorted to ground, do not short the unused output!
The battery terminals are labeled + and G simple enough.
You will want at most 23ga wire (and 26 is none too small) and a fine
as the solder points are tiny!
I combined them with Fishman style pickups that use a 2.5mm plug to connect, so I had to do some creative wiring to make them work for my application.
The wiring is straightforward, they are stereo, so one signal wire from a pair of pizeos goes to left (marked L) the other signal wire goes to right (marked R) and both ground wires are combined to the ground connector (marked G). If you're using this mono, you need to short the unused input to ground.
On the output side, if you're not using stereo, you need to mix the channels which can be done with a 100K Ohm resistor wired to each output. If using them mono, only the input needs shorted to ground, do not short the unused output!
The battery terminals are labeled + and G simple enough.
You will want at most 23ga wire (and 26 is none too small) and a fine
as the solder points are tiny!
Sounds great with the high speed amp chip installed.
Tony Maddi✓ Verified Purchase•September 1, 2023
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...
