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Ships within 48 hours · Estimated delivery Jul 14 - Jul 19
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Description
ZK-502C HIFI Wireless Bluetooth 5.0 TPA3116 Digital Power Audio Amplifier Board 50W X 2 Stereo AMP Amplificador, ZK-502C With Shell, ZK-502C Without Shell1. Chip solution: TPA3116D2 (with AM interference suppression function) 2. With or without filter: Yes (the sound is more mellow and clear after filtering) 3. Adapted supply voltage: 5~27V 4. Adapted speakers: 30W~200W, 4ohms, 8ohms 5. Number of channels: left and right dual channels (stereo) 6. Bluetooth version: 5. 0 7. Bluetooth transmission distance: 15 meters (unobstructed) 8. Protection mechanism: overvoltage, undervoltage, overheating, DC
1. Chip solution: TPA3116D2 (with AM interference suppression function)
2. With or without filter: Yes (the sound is more mellow and clear after filtering)
3. Adapted supply voltage: 5~27V
4. Adapted speakers: 30W~200W, 4ohms, 8ohms
5. Number of channels: left and right dual channels (stereo)
6. Bluetooth version: 5.0
7. Bluetooth transmission distance: 15 meters (unobstructed)
8. Protection mechanism: overvoltage, undervoltage, overheating, DC detection, short circuit protection
9. Tip: Only when the audio input is sufficient and the power supply voltage/current is sufficient, there will be sufficient output power. The higher the power supply voltage, the higher the relative power, and speakers with different impedances will have different output powers. In the case of sufficient voltage and current, the greater the ohms of the speaker, the lower the relative sound power, please pay attention!
10. Power supply voltage:
-12V ------ 8 ohm speaker/12W (left channel) + 12W (right channel), 4 ohm speaker/20W+ 20W
-15V ------ 8 ohms/18+ 18W, 4 ohms/more than 30 + 30W
-19V ------ 8 ohms/32 + 32W, 4 ohms/more than 45 + 45W
-24V ------ 8 ohms/38 + 38W, 4 ohms/more than 55 + 55W
Specification:
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- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.7 ★★★★★
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Product Reviews
★★★★★ 5
That it will work on a Stil weedeater
Style: 9" 2T Cutting Blade
The edger connected to my Stil weed eater and worked great. I would recommend it to anyone.
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Cut edges like a pro
Style: 9" 2T Cutting Blade
Better, much better than the OEM yellow and black brand. This has an all metal guard and the blade does not bind when it comes into contact with concrete. I have used it all summer for edging two commercial properties and my own lawn, it’s still turning and cutting with ease. Being all metal adds weight but the trade off over fragile plastic is worth the durability.
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Reviewed in the United States on November 4, 2025
★★★★★ 3
OK for light duty use only
Style: 9" 2T Cutting Blade
Not very strong or robust. Does fit my power head properly. Only recommend it for occasional, light duty use.
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Reviewed in the United States on November 5, 2025
★★★★★ 5
These work for the Worx trimmer WG928
Size: 16 Line Spools+4 Caps, Size: 16 Line Spools+4 Caps
Recently purchased the Work String trimmer and blower bundle. I found these and ordered them in hopes they were the right ones. They fit and work perfectly. Super easy to install. Pop out the old one and pop in the new. The string is pretty durable and thick. I love the idea of pre loaded spools. It got so annoying having to rewind the string on the spool every time I ran out. Price is fair and worth it. Highly recommend these if you have the same trimmer.
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Reviewed in the United States on September 2, 2024
★★★★★ 5
Worth taking the worry off my list.
Size: 16 Line Spools+4 Caps
Great to last forever and not pay over priced smaller packages.
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Reviewed in the United States on March 1, 2026