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Description
Fostex HP-A3MK2 32-Bit D/A Converter With Headphone AmpBuilding upon the success of the original, the Fostex HP A3MK2 is a USB DAC that converts digital audio to analog audio. The unit is capable of handling up to a 32 bit, 192 kHz digital audio source from your computer's USB port. Additionally, the HP A3MK2 includes S PDIF optical I O that supports 32 to 96 kHz 32 bit. The HP A3MK2 features a dual RCA line output and a 1 4" headphone output that's powered by integrated headphone amplifier. The unit is
Building upon the success of the original, the Fostex HP-A3MK2 is a USB DAC that converts digital audio to analog audio. The unit is capable of handling up to a 32-bit, 192 kHz digital audio source from your computer's USB port. Additionally, the HP-A3MK2 includes S/PDIF optical I/O that supports 32 to 96 kHz / 32-bit.
The HP-A3MK2 features a dual RCA line output and a 1/4" headphone output that's powered by integrated headphone amplifier. The unit is USB bus powered regardless of input routing choice and does not have a separate AC input. The input and output routing is selectable by front panel selector buttons.
High-Quality Sound Reproduction
- High-quality sound reproduction can be easily achieved by simply connecting a USB cable to a PC.
- USB audio and optical digital audio signals from a PC can be converted to analog signals and output from the line output terminal and headphone output terminal.
- When used as a USB DAC, it operates with the USB Audio 2.0 driver of the PC (Windows or macOS) and supports up to 32-bit/192 kHz. It can be used immediately after connecting the USB cable and performing simple settings.
ESS Technology DAC
- ES9016K2M from ESS Technology is used as the DAC chip
- The HP-A3 uses a high-quality DAC chip, and the supported sampling frequency has been greatly enhanced from 24-bit/96 kHz of the HP-A3 to 32-bit/192 kHz. This allows users to enjoy higher quality sound without sacrificing ease of use.
- S/P DIF input is limited to a maximum of 96 kHz
Improved Analog Circuitry
The analog circuitry has been newly designed to match the higher supported sampling frequency, and has improved THD (Total Harmonic Distortion) and other performance features that are comparable to those of high-end products.
Gain Switch
- The headphone output amplifier gain can now be switched between Hi and Lo positions, with the Hi position providing a 10 dB increase in volume over the Lo position.
- The Hi position is effective for low-level input signals and can be used with a variety of playback sources.
Specifications
| Number of Headphone Channels | |
| Recommended Headphone Impedance | |
| Headphone Output Power | |
| Digital Chipset | |
| EQ | |
| Display |
Connectivity
| Analog Audio I/O | |
| Digital Audio I/O | |
| USB I/O | |
| Wireless |
Performance
| Frequency Response | |
| THD |
Digital Audio
| Sample Rates | |
| Bit Depths |
Compatibility
| OS Compatibility |
Power
| Power Requirements | |
| DC Input Power | |
| Power Consumption |
Physical
| Dimensions | |
| Weight |
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
4.8 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 5
Warm feet and ankles > everything
Size: 10-11, Color: Red/Black Check
So, I know the foam is going to wear out quick on these, but they are so warm I dont even care. I will update when they start getting beat up. But so far these are great.
The soles on these arent the best. Its coushioned now, but even so my foot hangs off it. BUT, it is thick material and its keeping my feet and more importantly my ankles warm. Thats why I bought these. These isnt much on the bottoms to keep you from slipping hut what they have seems to be alright for now on hardwood floors. They fit true to size and are nice and stretchy, just beware the sole is a bit slim. For example my pinky toe hangs off it on both sides almost fully. Still a 7/10 would recommend for lounging around the house.
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Reviewed in the United States on March 11, 2026
★★★★★ 4
Warm, comfortable booties
Size: 12-13, Color: Red/Black Check
I would give these booties a 5 star because they are soft, warm, comfortable, high on my ankle and a color I appreciate. They are easy to slip on NOW. I say "NOW" because I have a deformed foot due to being broken. That foot was hard to get the bootie on. After 1 try in which some of the stitching came out; it's easy to put on.
The stitching came out far to easily. There are 3 lines of stitching. One line between the sole and 1st layer of polar fleece. That line has had no problem. The other 2 lines have each come out abt 3 inches.
I got size 12
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Reviewed in the United States on February 17, 2026
★★★★★ 5
Very Warm and Comfortable
Size: 12-13, Color: Red/Black Check
Love these. Just like walking on a cloud. They are very warm. Note there is no L or R, fits either foot.
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Reviewed in the United States on April 30, 2026
★★★★★ 3
Seams Separate Quickly
Size: 8-9, Color: Red/Black Check
They fall apart. The seams are terrible and almost immediately separate. Although they are warm and comfortable until stuff comes through the separated seams.
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Reviewed in the United States on March 29, 2026
★★★★★ 5
Meeting my expectations....
Size: 14-15, Color: Grey/White Check
I am a male with pretty large feet (Mens size 14US) and wanted some very warm slippers to wear around the house. I have nerve issues in my toes and if I don't keep my feet very warm they start to hurt. I wanted something both comfortable and warm. I received these a few days ago and so far they have done a great job at keeping my feet warm. The linings are thick and fluffy and the bottoms feel like they have a memory foam inner sole in them. The tops can either be worn up or rolled down. The actual soles are a soft leather-like material. They are thicker than normal cloth, but not hard like rubber soled slippers (I actually wanted something that was more of a slipper and less of a "shoe"). The only down side is that they don't really seem to have a left and right to them (both slippers seem identical), and for awhile no matter how I wore them, they felt a bit like they were on the wrong feet. However, they seem to have formed themselves to my feet and now (through wearing them) it definitely feels like there is a left and a right. I don't know how long these will last, but they were not expensive, so if I get a few months of wear from them, I will be happy and will just order another pair when these wear out. They aren't the most attractive slippers in the world, but they aren't horrible looking and they are very functional.
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Reviewed in the United States on February 24, 2025