After reading this thread I decided to buy one of these. Never saw until you mentioned it here. I thought for $30 bucks why not? The thing is so tiny it could be used just about anywhere, or even tucked inside an existing transport, or other DIY enclosure. I love the net (and Google) for uncovering gems like this and their potential possibilities.I recently purchased the FiiO D3 for $30. It uses the Wolfson WM8805. I also bought an AD8656 opamp to replace TI LMV358. Haven't changed it yet. The device sounds great to me.
Here is a review: Inside FiiO D3 H i F i D U I N O
Haven't done any critical listening to it yet, but it certainly doesn't sound awful to my ears anyway. 😀
I got around to opening up the $20 DAC and ADC:
"Digital to Analog Audio Converter"
SU1 CIRRUS LOGIC 8416-CZZ - 192 kHz Digital Audio Interface Receiver
SU2 SGM8054 - quad op-amp
U4 SE8119AKN - low dropout voltage regulator, 3.3V
U3 (not used)
U1 344C (10 pins) - CS4344 or copy, 24b/192k DAC
"Analog to Digital Audio Converter"
U17 Cirrus 5340CZZ - 101 dB, 192 kHz Stereo ADC
U21 CS8427-CZ - 96 kHz Digital Audio Transceiver
U22 EM78P153SNJ - microcontroller
12.288 MHz crystal.
U23 431 - maybe TL431?
I haven't taken the drastic step of actually plugging them in and listening to them or doing an RMAA test.
"Digital to Analog Audio Converter"
SU1 CIRRUS LOGIC 8416-CZZ - 192 kHz Digital Audio Interface Receiver
SU2 SGM8054 - quad op-amp
U4 SE8119AKN - low dropout voltage regulator, 3.3V
U3 (not used)
U1 344C (10 pins) - CS4344 or copy, 24b/192k DAC
"Analog to Digital Audio Converter"
U17 Cirrus 5340CZZ - 101 dB, 192 kHz Stereo ADC
U21 CS8427-CZ - 96 kHz Digital Audio Transceiver
U22 EM78P153SNJ - microcontroller
12.288 MHz crystal.
U23 431 - maybe TL431?
I haven't taken the drastic step of actually plugging them in and listening to them or doing an RMAA test.
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