Maybe it's the LT1010CT output buffer (To-220 chips with small heastsinks). Try to solder the rca wires directly at the inputs (Pin 1) to bypass.

MojoAudio ESS9018/9028/9038 have current outputs. And what's more important here, PCM1704, PCM63 as well as AD1862 and AD1865 all have current output which can be used for various methods of I/V conversion (resistor, transformer, opamp etc.) You once again wrote a lengthy chapter of no...

I suggest you keep your nerves in check. Let's leave it to others to judge who is insulting who in this thread. I only asked you "Do you have any measurements to prove this claim? Which parameters exactly have improved by 30%?" and you claimed "the act of measuring them would often corrupt the...

This is the second time I called you out, both times on a specific topic, and you once again flood us with your self-assessment of superiority without even replying to the questions asked. And then we have quantum physics… I'm really sorry to see you sign off before elaborating on that. I asked...

I wont argue with quantum mechanics :-). Quantum effects have been observed, proven and documented. If MojoAudio has measurements or calculations to substantiate his claim, then I guess his products are worth their weight in gold. I'd just like to see proof and not marketing babble.

This is the most absurd thing I've read in ages. Did you just claim relativistic effects for measurement of audio frequencies? While I wont argue that the PSU can always be upgraded, as I have done that indeed, your suggestion of upgrading opamps (on an Audio Note tube dac) or hook up wire...

My current DAC is the old generation Audio Note DAC3 based on 2x PCM63-K chips. I have converted it to USB input by removing the SPDIF receiver and digital filter and feeding the DAC chips with right justified serial data as decoded by the above mentioned JL Sounds USB interface. It's an amazing...

Do you have any measurements to prove this claim? Which parameters exactly have improved by 30%?

Yes! Seeing how you are not addressing my replies to you, the least I expect from you as a DAC designer is to read the datasheet. TDA1543 has no voltage output. It is a current output DAC, and operating it without an active output stage is only possible with a non standard (higher than 5V)...

This is perfectly correct, but the reason for this is the noisy integrated current source or internal logic of the chip. I think you'll admit that even supplying the TDA1543 with 0.1uV power supply will not get you the lost bits back. It is perfectly true to say noise at the output will limit...

Because it makes the assumption that PSU noise goes unattenuated into the signal. This is a false statement, based on the understanding that DAC signal is a time modulated function of the voltage input. This is not true. Thousands of commercial products have power supplies with multiple...

Would you mind posting the datasheet you are referring to? There are indeed two versions. One is the TDA1543 we are discussing, another the TDA1543A which is the same chip but with "Japanese input format" instead of I2S. Otherwise, neither has SPDIF input, integrated digital filter, 4x...

I'm sorry, but there's plenty of factual errors here. Unless you are mistaking the TDA1543 for something else, it seems you don't have much experience with that chip. 1. The TDA1543 does not have an SPDIF receiver, nor would it require one in a typical cd player. It has i2s input. 2. It doesn't...

For your list, the Audio Note 0.1x uses the TDA1543 while DAC1 up to DAC5 all use the AD1865. All have the CS8414 spdif receiver and of course, tube output.

I see nothing what would suggest LTC2753 is a Delta-Sigma chip. In fact, the non-linearity characteristic and glitching is very much typical for R2R, so is the limited bit-resolution. Chance is, this could indeed be a nice audio DAC. UDA1305AT is in fact the TDA1305T, a well known chip from the...

As it seems, it's time to (re-)join the club. I've been having nostalgic moments after my long gone Cambridge Dacmagic 3 (Based on 2x TDA1305T chips, hybrid R2R and DS) and I just couldn't find that with liquid and explosive sound with any modern device I've tried. I currently own 5 DACs...

  Can you please check how the volume trimming behaves on power on/off? Also whether it works for XLR or RCA outputs only? As far as I know, ESS does volume adjustment internally on a 32bit word. This is a better solution for sound quality. When adjusting volume digitally via software, you are...

Hi. I have some questions about the volume control. Does it reset on power on/off or does it revert back to the last setting? Does it work for XLR outputs?

Appears that a new version, a Yulong DAH1 Mark2 is just released. Talk about extreme cost reductions, crisis must be hitting china: 2009 Brand New YULONG DAH1 MARK II DAC/ Headphone Amp - eBay (item 370181839193 end time Apr-30-09 13:55:55 PDT)

And finally, a pic: green and red are Wima FKP2 caps (2.2n, 3.3n, 4.4n) yellow are tantalum caps (4.7uF and 10uF) brown are Silver Mica (100p) light-blue (Evox Rifa MKPs) caps are voltage reference (0.1uF) for the DAC + 3 x Bourns 100kOhm trimpots

One more thing that really could be improved in DAH1 is the power supply. As was pointed out earlier in this thread, there is a considerable amount of GND noise and also quite a lot of voltage noise on each supply rail. Standard 7805 (+5V), 7905 (-5V), 7812 (+12V) and 7912 (-12v) are used for...

jsplice> Thanks for your kind words. I design optoelectronic sensors, but I'm not really that well trained in electronics. I'm a physicist. My work involves some simple electronics only, but I have good tools and I'm good at connecting facts together . I ultimately trust in measurement and...

Well, I didn't. Where should I write my wish list ? So I have some more news, as I just finished installing XLRs in my yulong. First I verified the layout for accuracy with the AD1955 datasheet and well, it wasn't accurate . The text below is best read when looking at the suggested...

Over the time I've grown to like the AD8066 very much and when tried, I didn't enjoy the AD8599 at all. It was dry and forward sounding, lacking the fine top end sparkle. I wouldn't call if warm, but simply limited. I tried the THD4032 once again, this time with proper decoupling, and it is...

A small followup - I did some research and found out that the old version used a xitel usb->spdif interface which is known to be really bad for jitter perfomance: DIYHiFi.org • View topic - UDA1321 and jitter . It appears that PCM27xx is (sadly) the best solution currently available...