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ZK‑502L Bluetooth Power Amplifier Board 5.0 Stereo Audio Receiver Dual Channels Digital Audio Amplifier Module for DIY Speakers 5-24V

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$13.16

$ 6 .03 $6.03

In Stock

About this item

  • Strong Compatibility: The amplifier module is equipped with a terminal block and a 2.1mm socket, which is compatible with most laptop power ports. Can directly connect to Bluetooth 5.0. and compatible with a variety of speakers. Two 20W, 30W or 50W power amplifier boards are equipped with various speakers (4 to 8 Ω), and support Bluetooth stereo audio input and AUX audio input.
  • Built-in Filter Capacitor: The built in filter capacitor of this digital power amplifier module makes it available for processing sound . Knob potentiometer design, convenient to adjust power ON and OFF, V+ and V‑.
  • Adapted Power Supply Voltage: 5-24V (optional 9V/12V/15V18V/24V and Other Adapters, High Power Recommended High Voltage). To Noise Ratio: >90 dB. Adapted Speakers: 30W-200 W, 4Ω-8Ω.
  • Mechanism: Adopt acrylic protective shell design, with reverse connection , overvoltage , undervoltage , over temperature , short circuit . Self recovery overheating .
  • Wide Range Of Applications: This bluetooth speaker power amplifier board has no POPs sound when powering on, skipping songs and pausing. It is widely used in refitting speakers, power amplifier equipment, and car Bluetooth equipment.



Product Description

Bluetooth Power Amplifier Board
Bluetooth Power Amplifier Board
Bluetooth Power Amplifier Board
Stereo Audio Amplifier Board
Stereo Audio Amplifier Board


Features


The amplifier module is equipped with a terminal block and a DC 2.1mm socket, which is compatible with most laptop power ports. Can directly connect to Bluetooth 5.0. and compatible with a variety of speakers.


The built in filter capacitor of this digital power amplifier module makes it available for processing sound signals. Knob potentiometer design, convenient to adjust power ON and OFF, V+ and V‑.


Two 20W, 30W or 50W power amplifier boards are equipped with various speakers (4 to 8 Ω), and support Bluetooth stereo audio input and AUX audio input.


Adopt acrylic protective shell design, with reverse connection protection, overvoltage protection, undervoltage protection, over temperature protection, short circuit protection. Self recovery overheating protection.


This bluetooth speaker power amplifier board has no POPs sound when powering on, skipping songs and pausing. It is widely used in refitting speakers, power amplifier equipment, and car Bluetooth equipment.


Specification:


Item Type: Power Amplifier Board


Material: PCB


Purpose: Digital Power Amplifier Board


Model: ZK-502L


Bluetooth Version: 5.0


Input Method: Bluetooth


Number Of Channels: Left and Right Dual Channels (stereo)


Bluetooth Version: 5.0 (Unobstructed, Approx. 15m/49.2ft)


Signal To Noise Ratio: >90 dB


Adapted Speakers: 30W-200 W, 4Ω-8Ω


12V-8 Ω/12W+12W, 4 Ω/20W+20W


15V-8 Ω/18W+18W, 4 Ω/30W+30W


19V-8 Ω/32W+32W, 4 Ω/45W+45W


24V-8 Ω/38W+38W, 4 Ω/50W+50W


Protection Mechanism: Self Recovery Overheating Protection, Self Recovery Short Circuit Protection


Package List


1 x Power Amplifier Board


1 x Screwdriver


9 x Screw


4 x Brass Connecting Rod


2 x Acrylic Board


1 x Knob


1 x Cable


Note:
The input voltage cannot exceed 24V, otherwise the audio amplifier module will be damaged.


Customer
Reviewed in the United States on March 18, 2025
I had a problem with my first one, I contacted the seller and they responded right away. They sent me a new flashlight even though my original one was almost a year old. Thanks
Raymond Fairfield
Reviewed in Canada on March 14, 2025
Awesome product, works great
David Sauvé
Reviewed in Canada on February 25, 2025
I got some old bookshelf speakers from the workplace and needed a small amp to go with it. I got this to print my own enclosure and use the speakers as a simple "bluetooth speaker" for the kitchen. Lo and behold, that little amp works like a champ. My speakers are Roemtech 3.4" / 8ohm / 40W. Worked first at first go, just plugged the speakers, used an old 12V/3.5A adapter.Sound wise, it actually sounds really good. Won't beat a dedicated Hi-Fi amp, but that's not what I wanted it for. Very small, once I design and print the enclosure, it will be very discreet.Only negative - may be a deal breaker for some, but not for me: Even when turned off, the Bluetooth component stays "on". Meaning your phone will keep re-connecting to it if you paired it before. Could lead to unfortunate audio piping if you are not careful. You need to manually "forget" the device in order to be able to re-pair easily something else (like earbuds, car speaker, etc.). Annoying, but for the value, I'm all fine with it.
MHall
Reviewed in the United States on April 6, 2025
This is exactly what I needed to interface my BT player into my tractor. Everything is clearly labeled, there is plenty of power, the sound quality is very good, and the bluetooth connectivity is most reliable. All things considered, a very good value.
reddevilmedic
Reviewed in the United States on June 7, 2024
Used this to wire up a portable Bluetooth speaker. Easy to work with and pushes two 6x9’s
JAM2000
Reviewed in Canada on May 29, 2024
It works pretty good really easy to setup though as mentioned in another review the Bluetooth is always on, so it will kill the battery in a portable speaker. It sounds ok up until about half volume where it seems to distort the audio a good bit. Definitely worth the price though 👌
Roger Thompson
Reviewed in Canada on March 5, 2024
After hooking it up, and getting it working, which was a breeze and sounded great!One I tested it though, big flaw!The on/off switch does not turn off the bluetooth! If it wasn't for the flawed design that causes this continuous drain the unit is pretty useless for battery powered devices! If you use it on a power pack, no real issue! Just a poor design or production issue (why leave BT on all the time? tracking???. ) You will have to add your own on/off switch to ensure the unit is actually turned off.
Jason Shawaga
Reviewed in Canada on December 6, 2024
Works great, I have 2
Sherry
Reviewed in the United States on December 1, 2024
Grandson had hooked to speaker and playing music within minutes.
Knucklebusted
Reviewed in the United States on October 5, 2024
I was wanting to tinker with something like this to see if it would work to add Bluetooth to my old car. It powered up and has great sound for the size and price. I've only tested it in the house but I'll soon be setting it up in my 53-year-old Buick that only has an AM radio.3/29/2025 Update: I finally wired it up in my dash with a set of stereo speakers. It works very nicely. I wired it to accessory and ignition so it doesn't run the battery down. I used Velcro to attach it to the radio bezel.
Costin G.
Reviewed in Canada on October 14, 2024
I bought this to install in my 6year old's 24v dune buggy, bar was really not high. This thing actually works really well and doesn't heat up as bad as i thought it would. It's actually a good choice for the price for any diy speaker setup that doesn't need crazy amounts of power.
Rui
Reviewed in Canada on June 10, 2023
It’s an amazing little amp. Easy to assemble, and it will take pretty much any type of wallwart power supply…just check the polarity. The only minor issue was that the device name in the Bluetooth list is not what’s mentioned in the listing: on mine, it’s WZ-BT5.0. It connected automatically as soon as I turned on the unit. True stereo, currently connected to a pair of Pyramid 4080 I had kicking around. Good, balanced sound.
Jon Rooke
Reviewed in Canada on March 27, 2023
I bought this to retrofit a vintage radio to use bluetooth. Within 5 minutes of opening up the package, I was ready to go. The set up was easy, the amp recognizes my phone without any issues. The sound quality is astoundingly good, much better than the car lighter/FM signal variety. For the money, I would highly reccomend it.