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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12
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Description
FiiO New K3S Desktop Headphone Amplifier & USB DACTwo USB AUDIO modes Flagship grade PCM 384k DSD256 decoding RGB indicator light Dual headphone outs, dual digital audio outs ADC volume controlJust connect the new K3S to your computer via USB to instantly upgrade to high fidelity sound, and enjoy your music the way it was meant to be heard. Equipped with an XMOS USB receiver chip, the new K3 headphone amps is capable of decoding up to 384kHz 32 bit PCM and native DSD256 the same as many DACs costing
Two USB AUDIO modes | Flagship-grade PCM 384k/DSD256 decoding RGB indicator light | Dual headphone outs, dual digital audio outs ADC volume controlJust connect the new K3S to your computer via USB to instantly upgrade to high-fidelity sound, and enjoy your music the way it was meant to be heard. Equipped with an XMOS USB receiver chip, the new K3 headphone amps is capable of decoding up to 384kHz/32 bit PCM and native DSD256 – the same as many DACs costing much more.
The new K3's dual crystal oscillators ensure that any digital audio signals being fed into the DAC are exactly correct for further enhanced sound quality.
Hardware scheme
XMOS: XU208, DAC: ES9038Q2M, LPF: TI OPA1612, AMP: OPA926×2
Volume control
ADC analog potentiometer
Firm upgrade
XMOS edition supports upgrade via USB
Max sampling rate
384kHz-32bit/DSD256
Recommended headphone impedance
16~150 Ω
192kHz-32bit/DSD64 (coaxial)
96kHz-32bit (optical)
USB
USB Type-C (USB 1.0/USB 2.0)
Balanced headphone output port
2.5mm
Analog audio output port (LO)
Standard 3.5 mm
Headphone output port
Standard 3.5 mm
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
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.4 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 3
Not well made
I have used these for 2 weeks now and one of them has a hole in the sole...
I won't ever buy them again
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Reviewed in the United States on July 15, 2025
★★★★★ 5
So excited for results, feels like it’s working!
Size: Medium, Unit Count: 4
First time trying them right now as delivered today. Originally thought was supposed to wear all night but glad to find out 30 minutes just because my dog sleeps on my feet over my sheets! These silicone socks feel great and I trim my toe nails short enough they seem very durable and unlikely to rip like the pic review shows. I am confident my feet and heels will much smoother after first time wearing! I do have acrylic nails so I will be careful
Putting the silicone socks on and off. Just as easy as the video the spread the lotion inside the socks and rub it around, mess free!!
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Reviewed in the United States on January 18, 2026
★★★★★ 5
Actually, better than I expected!
Size: Medium, Unit Count: 4
These are better than what I was expecting based on the reviews. I do put them on carefully because someone said you can’t tear them so I’m careful putting them on, but they almost don’t feel like you’re wearing anything as long as you don’t put them too tight on your toes. I can put lotion on my feet and I know it has to soak in because there’s no place else for it to go like socks or my bed.
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Reviewed in the United States on April 20, 2026
★★★★★ 5
Moisturing
Size: Medium, Unit Count: 4
The silicone socks are nice, they help my dry heels. I will warn you don't walk with them I got up in the middle of the night and tore one pair.
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Reviewed in the United States on April 3, 2026
★★★★★ 3
So so...
Size: Medium, Unit Count: 2
They do what they advertised.
You can NOT walk in them you will stretch them and pop a hole in them.
You cannot sleep in them unless your going to wear larger cotton socks with them to keep them in place. They are easy to wash and dry which is nice. I will need to buy another pair. Great if your gonna watch a movie or binge TV in.
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Reviewed in the United States on April 7, 2026