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Ships within 48 hours · Estimated delivery Aug 15 - Aug 20
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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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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
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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.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 5
Great price & works fast.
Compact and fast - I love it! Could not beat the price and it's faster than my Food Saver!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
★★★★★ 5
Protection Plan
The process was easy and flawless
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Reviewed in the United States on June 1, 2026
★★★★★ 5
It is worth purchasing a Protection Plan on an unfamiliar item
Bought a 3-year protection plan for a nut milk maker machine for $5.99. It was a fairly new kitchen item in our household and we were not familiar with the brand. So, I bought the plan for a piece (peace) of mind. The machine worked nicely for about 18-20 months with daily use until it tripped the circuit outlet.
My initial chat with Asurion did not go as I expected due to discrepancy on their end as they see a protection plan for the nut milk maker as a sporting goods valued between $100-$199, not as a kitchen item valued between $30-$39.99. ( I had bought 3 different protection plan on th same day for multiple items purchased on Prime Days). They were looking at a different plan and I was unable to get them to "scroll over" to the appropriate protection plan.
I tried again on a different day during the first hour of their contact hours and had a cheerful Asurion agent who was able to find the appropriate kitchen item protection plan. It was a simple and thorough conversation and transaction. I was refunded within hours after I packed up and dropped off the damaged item out to UPS.
Moral of the story: Asurion Protection Plan is worth it and contact them at the start of their first day shift, not at the end of their evening shift.
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Warranty Plan
Hop I won’t have to use the warranty but it was reasonably priced.
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Reviewed in the United States on April 21, 2026
★★★★★ 4
You have to print return label!
4 of 5 because you have to print a return label and for those of us who don't need a printer therefor don't have one its too much trouble
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
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