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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
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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.
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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]
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4.1 ★★★★★
Based on 224 reviews
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Product Reviews
★★★★★ 5
Comfortable dress shoe.
Size: 7, Color: Brown Napa Leather
Finally a comfortable dress shoe. It's both comfortable to walk in and looks and wears like a more traditional dress shoes for the office.
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Reviewed in the United States on May 6, 2026
★★★★★ 5
Slip-on ready and great quality
Size: 9, Color: Black
These shoes were stuff for the first half hour but then feel great. Well worth the chance and money. Great quality and slip-on easy
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Great buy
Size: 11, Color: Tan
Great fit comfortable look good
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Great shoes
Size: 14 Wide, Color: Black
My shoes look good and feel good and now I’m going to purchase the brown pair I saw
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Reviewed in the United States on April 24, 2026
★★★★★ 4
Don’t buy for restaurant industry
Size: 10.5, Color: Black, Size: 10.5, Color: Black
Good looking shoes, fairly comfortable and good value based on the description shared, so I don’t feel it’s fair to rate them lower than 4 stars. I had high hopes for them based on previous reviews from others saying they wore them in the food and beverage industry that mentioned their quality and durability, however I strongly recommend looking elsewhere if you do. I purchased these to wear working in a full service upscale restaurant and in less than two months have managed to have torn the material on the middle exterior section and the bottoms of the shoes are already completely worn down. Good design, but the durability needs to be improved if they’re to hold up for that industry.
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Reviewed in the United States on July 18, 2025