47 Laboratory Shigaraki D/A Converter - beautiful preowned unit

by tlkoo Fri Jan 11, 2019 6:01 pm

asking price is RM1k5 (still in original packing)
feel free to arrange for audition to confirm perfect functionality

feel free to contact to make arrangement
phone number 01eight 2166 zero 66

thanks/ regards

Excerpt from Stereophile review:

The 4715 is surely among the smallest DACs in high-end audio, and the main reason for that is Kimura's desire to keep signal paths as short as possible. Mission accomplished, I'd say. The converter is the more radical of these two products: It has no digital filter chip—so it can run neither resolution-enhancement schemes à la HDCD nor bog-standard oversampling—and it doesn't even contain an analog filter. What it does contain is a total of only 20 parts: 7 resistors, 3 film capacitors, 6 electrolytic capacitors, 2 voltage regulators, and 2 chips. Of the last, one is a Philips TDA1543T 16-bit dual DAC, the other a Crystal CD8412 input receiver. That's it—that and a tiny circuit board, a few jacks, and a neat-looking ceramic box. There isn't even an op-amp for converting current to voltage at the output, because that's done passively, with two resistors.
Now let's go back to the DAC's curious lack of oversampling, an otherwise common scheme in which digital spuriae are pushed into a higher frequency range, where they can then be removed by a more benign filter than the rightly maligned "brick walls" of yore. (I admit that such "make things worse before you make them better" techniques appeal to me, at least in theory—like early Dolby NR, or the fact that fishhooks, once embedded in your skin, have to be pushed in deeper before they can be got out.) The reason for omitting an oversampling filter has to do with that other CD bugaboo, jitter, which, as you know, refers to timing errors in the digital domain. Japanese audio writer Ryohei Kusunoki describes a parameter called "timing-error threshold," which is the amount of jitter allowable in a digital system before it corrupts the post-conversion waveform. Kusunoki predicts a timing-error threshold of 173 picoseconds for a 16-bit digital playback system with a 44.1kHz sampling rate (1÷44.1kHz÷216=173).

Read more at https://www.stereophile.com/digitalprocessors/800/index.html#u7wwxhzpHdPmqpt3.99

by tlkoo Mon Aug 24, 2020 12:07 pm

BUMP

note: no time to entertain few potential buyers, and the item was forgotten for some time

47 Laboratory Shigaraki D/A Converter - beautiful preowned unit

47 Laboratory Shigaraki D/A Converter - beautiful preowned unit

Re: 47 Laboratory Shigaraki D/A Converter - beautiful preowned unit