--- product_id: 463504386 title: "Walfront ZK‑502L Bluetooth Power Amplifier Board 5.0 Stereo Audio Receiver Dual Channels Digital Audio Amplifier Module for DIY Speakers 5-24V" brand: "walfront" price: "AR$183344" currency: ARS in_stock: true reviews_count: 5 category: "Walfront" url: https://www.desertcart.com.ar/products/463504386-walfront-zk-502l-bluetooth-power-amplifier-board-5-0-stereo store_origin: AR region: Argentina --- # 5-24V Power Supply Bluetooth 5.0 Multiple Protections Walfront ZK‑502L Bluetooth Power Amplifier Board 5.0 Stereo Audio Receiver Dual Channels Digital Audio Amplifier Module for DIY Speakers 5-24V **Brand:** walfront **Price:** AR$183344 **Availability:** ✅ In Stock ## Summary > 🎶 Amplify Your Sound, Elevate Your Space! ## Quick Answers - **What is this?** Walfront ZK‑502L Bluetooth Power Amplifier Board 5.0 Stereo Audio Receiver Dual Channels Digital Audio Amplifier Module for DIY Speakers 5-24V by walfront - **How much does it cost?** AR$183344 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/463504386-walfront-zk-502l-bluetooth-power-amplifier-board-5-0-stereo) ## Best For - walfront enthusiasts ## Why This Product - Trusted walfront brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **DIY Friendly:** Perfect for DIY enthusiasts looking to enhance their audio experience with custom setups. - • **Robust Sound Quality:** Enjoy crystal-clear audio with a signal-to-noise ratio exceeding 90 dB. - • **Seamless Connectivity:** Experience the power of Bluetooth 5.0 for instant pairing with your devices. - • **Versatile Power Options:** Adaptable to a range of voltages (5-24V) for ultimate flexibility in setup. - • **Built-in Safety Features:** Stay worry-free with comprehensive protection mechanisms against common electrical issues. ## Overview The Walfront ZK-502L Bluetooth Power Amplifier Board is a versatile audio solution designed for DIY enthusiasts. It supports Bluetooth 5.0 connectivity, operates on a wide voltage range of 5-24V, and features a high signal-to-noise ratio for superior sound quality. With built-in safety protections and a user-friendly design, this amplifier is perfect for enhancing your audio projects. ## Description 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 Power Supply Voltage: 5-24V (optional 9V/12V/15V18V/24V and Other Adapters, High Power Recommended High Voltage) Adapted Speakers: 30W-200 W, 4Ω-8Ω Power supply voltage: 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. Review: Works well, very impressed - Very impressed by this little item. I used it to replace an antiquated CD system in a infrared sauna. Connected it to an unused 12 volt DC lights circuit on the sauna control board. Audio quality seems great. I hear no distortion or feedback. I only have it at half volume using the volume knob on the unit itself then controlling volume with my phone beyond that point. I think it could exceed the ability of the speakers that are currently installed. With the current setup it can go louder than I would ever play it ( two 5" speakers directly to this unit relying entirely on the amplification of this device to drive the speakers) I was able to connect via Bluetooth with my phone with very little effort. Shows up as WZ-BT5.0 I'm able to keep my phone 20 ft away with no disruption in connection.( haven't tested further than that it could potentially work from further away but I haven't tested since it wasn't required) Review: A Great Bluetooth Speaker Amp - This small bluetooth amp is amazing. I had a Bose Wave Radio/CD player, which is well known for its big sound. Unfortunately the capacitors dried out and the Bose Wave Radio stopped working. I completely gutted the electronics inside the radio case, but kept the excellent speakers and baffling system intact. I hot glued the ZK-502 in the case, wired in the speakers, and wired in an Asus laptop power supply I kept when the computer was obsolete. I also wired in an LED light be hind the green screen so I can tell when its on or off. I also purchased an $8 remote control outlet so that I can turn it on and off. The results were fantastic! I the amp powers the speakers beautifully! Which is amazing at the cost of $13. The bluetooth connection is immediate when it is powered on. I either connect to my Mac or Phone. If you want to change from one to the other, you do have to disconnect from the other device because in can only connect to one at a time. I couldn't be more pleased with it. I have given knew life to the Bose Wave Radio, which is not a radio anymore but a bluetooth speaker, with the same great sound. Actually, I like this better because streaming music has largely replaced CDs and with the tune in app I have all the radio stations I need across the world. Right now I give it 5 stars because it works and works well. How durable/reliable it is only time will tell. If it dies within a year, I will update my review. ## Features - Strong Compatibility: 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 wireless 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 signals. 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). Signal To Noise Ratio: >90 dB. Adapted Speakers: 30W-200 W, 4Ω-8Ω. - Protection Mechanism: Adopt acrylic protective shell design, with reverse connection protection, overvoltage protection, undervoltage protection, over temperature protection, short circuit protection. Self recovery overheating protection. - 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09J9338KS | | Brand | Walfront | | Brand Name | Walfront | | Customer Reviews | 4.3 out of 5 stars 113 Reviews | | Included Components | inc | | Manufacturer | Walfront | | Material Type | Material | | Maximum Output Power | 200 watts | | Maximum Supply Voltage | 24 Volts | | Maximum supply voltage | 24 Volts | | Minimum Supply Voltage | 5 Volts | | Minimum supply voltage | 5 Volts | | Model | ZK 502L | | Mounting Type | Surface Mount | | Mounting type | Surface Mount | | Number of Channels | 2 | | Number of Items | 1 | | Number of Packs | 1 | | Package Type Name | Box | | Part Number | Walfront1c0mu4qvrb6020 | | Voltage | 24 Volts | ## Product Details - **Voltage:** 24 Volts - **Manufacturer:** Walfront - **Maximum supply voltage:** 24 Volts - **Minimum supply voltage:** 5 Volts - **Mounting type:** Surface Mount ## Images ![Walfront ZK‑502L Bluetooth Power Amplifier Board 5.0 Stereo Audio Receiver Dual Channels Digital Audio Amplifier Module for DIY Speakers 5-24V - Image 1](https://m.media-amazon.com/images/I/61WASAInQQL.jpg) ![Walfront ZK‑502L Bluetooth Power Amplifier Board 5.0 Stereo Audio Receiver Dual Channels Digital Audio Amplifier Module for DIY Speakers 5-24V - Image 2](https://m.media-amazon.com/images/I/61za2Ez4sgL.jpg) ![Walfront ZK‑502L Bluetooth Power Amplifier Board 5.0 Stereo Audio Receiver Dual Channels Digital Audio Amplifier Module for DIY Speakers 5-24V - Image 3](https://m.media-amazon.com/images/I/61Y62FgXLRL.jpg) ![Walfront ZK‑502L Bluetooth Power Amplifier Board 5.0 Stereo Audio Receiver Dual Channels Digital Audio Amplifier Module for DIY Speakers 5-24V - Image 4](https://m.media-amazon.com/images/I/81uvvGKbm3L.jpg) ![Walfront ZK‑502L Bluetooth Power Amplifier Board 5.0 Stereo Audio Receiver Dual Channels Digital Audio Amplifier Module for DIY Speakers 5-24V - Image 5](https://m.media-amazon.com/images/I/81JQabHRTjL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works well, very impressed *by C***R on 12 April 2025* Very impressed by this little item. I used it to replace an antiquated CD system in a infrared sauna. Connected it to an unused 12 volt DC lights circuit on the sauna control board. Audio quality seems great. I hear no distortion or feedback. I only have it at half volume using the volume knob on the unit itself then controlling volume with my phone beyond that point. I think it could exceed the ability of the speakers that are currently installed. With the current setup it can go louder than I would ever play it ( two 5" speakers directly to this unit relying entirely on the amplification of this device to drive the speakers) I was able to connect via Bluetooth with my phone with very little effort. Shows up as WZ-BT5.0 I'm able to keep my phone 20 ft away with no disruption in connection.( haven't tested further than that it could potentially work from further away but I haven't tested since it wasn't required) ### ⭐⭐⭐⭐⭐ A Great Bluetooth Speaker Amp *by L***J on 8 October 2026* This small bluetooth amp is amazing. I had a Bose Wave Radio/CD player, which is well known for its big sound. Unfortunately the capacitors dried out and the Bose Wave Radio stopped working. I completely gutted the electronics inside the radio case, but kept the excellent speakers and baffling system intact. I hot glued the ZK-502 in the case, wired in the speakers, and wired in an Asus laptop power supply I kept when the computer was obsolete. I also wired in an LED light be hind the green screen so I can tell when its on or off. I also purchased an $8 remote control outlet so that I can turn it on and off. The results were fantastic! I the amp powers the speakers beautifully! Which is amazing at the cost of $13. The bluetooth connection is immediate when it is powered on. I either connect to my Mac or Phone. If you want to change from one to the other, you do have to disconnect from the other device because in can only connect to one at a time. I couldn't be more pleased with it. I have given knew life to the Bose Wave Radio, which is not a radio anymore but a bluetooth speaker, with the same great sound. Actually, I like this better because streaming music has largely replaced CDs and with the tune in app I have all the radio stations I need across the world. Right now I give it 5 stars because it works and works well. How durable/reliable it is only time will tell. If it dies within a year, I will update my review. ### ⭐⭐⭐⭐⭐ Awesome Sound for the Price *by K***D on 5 October 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. ## Frequently Bought Together - ZK‑502L Bluetooth Power Amplifier Board 5.0 Stereo Audio Receiver Channels Digital Audio Amplifier Module for DIY Speakers 5-24V - DC15V Power Supply AC Adapter Charger 15V Power Cord AC to DC15Volt 3A 2.5A 2A 1500mA 1000mA 500mA Regulated Switching Power Adapter with 11 Plug Tips for Massage Gun Monitor Display (DC15V~3A) - BLUECELL 1 Pair 3-Inch Double Binding Round Gold Plate Push Spring Loaded Jacks Speaker Box Terminal Cup --- ## 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.com.ar/products/463504386-walfront-zk-502l-bluetooth-power-amplifier-board-5-0-stereo](https://www.desertcart.com.ar/products/463504386-walfront-zk-502l-bluetooth-power-amplifier-board-5-0-stereo) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-10-21*