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Class D Switching Power Amplifiers and Power D/A conversion

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Old 1st November 2013, 08:02 PM   #1
diyAudio Member
Join Date: Sep 2009
Default New HiFimeDIY USB Digital Amplifier

HiFimeDIY UD20 USB Digital Power Amplifier

Alright, I'll admit, I just want to be the first one posting about this. Since, I dont know about DDX, nor do I begin to understand the implications of PCM to PWM conversion.
The primary differences are USB input vs SPDIF, OPTICAL on the previous DDX320v2. Which is presently out of stock. Lower power output. 20W at 8 ohms vs 75/65 at 4 and 8 ohms respectively for the DDX320v2. Might be sufficient for the system I presently looking into. The output stage is a STA335BW, presumably a lower rung model compared to the STA510A on the DDX320v2. The USB receiver is a savitech SA9023. The DDX320v2 had a wolfson WM8805. The UD20 takes 24/96 from USB, compared to the 32/192 that the DDX accepts. It's stereo while the DDX is 2.1. Finally, it comes fully assembled in a case with a volume pot.
No word on the pricing yet. It says they will start shipping in the beginning of december on the site.
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Old 21st November 2013, 10:16 PM   #2
diyAudio Member
Join Date: Nov 2010
Location: Göteborg
It seems to be ready for shipping now, and it is priced at €60.25. I'll probably order one and compare it to the DDX320v2.
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