SHANLING UP4 Portable Headphone Amplifier Dual ES9218P DAC/AMP HiFi CSR8675 Bluetooth 5.0 Balanced Output Headphone Amplifier

SHANLING UP4 Portable Headphone Amplifier Dual ES9218P DAC/AMP HiFi CSR8675 Bluetooth 5.0 Balanced Output Headphone Amplifier

Marsoni

M251S

$89.10

Get it in 3 business days with 1 day shipping. Friday, May 29

SHANLING UP4 Portable Headphone Amplifier Dual ES9218P DAC/AMP HiFi CSR8675 Bluetooth 5.0 Balanced Output Headphone AmplifierShanling UP4 Portable Hi Fi Bluetooth Amplifier With Balanced output for better sound and even more power 1Dual ES9218P DAC AMP CSR8675 Bluetooth 5. 0 2Dual DAC mode 4 Digital Filters 32. 5mm Balanced output Low& High Gain 43. 5mm Single ended output 5Extra powerful output Up to 15h battery life SPEC Battery Life15 hours (single ended), 10 hours (balanced) Charging2 hours Battery550 mAh Power adapterDC5V 500mA USBtype C interface, support driver free

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Didn't really believe the hype. Did a little research and watched Project Farm and decided to try. Im not a snake oil guy....but I will say my 2013 common rail TDI is quieter and I get a tad more fuel mileage. Does it pay for itself? Well, it does get better mpg, but I feel the reduction in noise most likely relates to less wear and tear and thats good enough for me. Im only using 1oz per fill up (about 14 gallons) so it lasts a very long time. I get 40mpg and im not light footed.

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Reviewed in the United States on April 2, 2026

Verified Purchase

James Jay

Chelsea, US

★★★★★ 5

It's a spark plug

What i needwd

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 27, 2026

Verified Purchase

San Leandro, US