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NAD M51
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<blockquote data-quote="Gojakla" data-source="post: 1057387935" data-attributes="member: 17289"><p><span style="font-size: 15px"><strong>NAD M51 Direct Digital DAC</strong></span></p><p></p><p></p><p><span style="color: #ff8c00">35-bit 844kHz DAC and Digital Preamp</span></p><p></p><p></p><p></p><p></p><p></p><p><img src="http://nadelectronics.com/img/img.php?140110102819-M51_Black_Front.jpg/1200" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p><img src="https://www.wifimedia.eu/images/M51DAC-600.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p></p><p><a href="http://nadelectronics.com/products/masters-series/M51-Direct-Digital-DAC" target="_blank">Επίσημη Σελίδα Προϊόντος</a></p><p></p><p></p><p>Ενδεικτικό review από <a href="http://www.stereophile.com/content/nad-m51-direct-digital-da-converter" target="_blank">Stereophile</a>.</p><p></p><p></p><p></p><p></p><p></p><p><strong>Specs:</strong></p><p></p><p></p><p><span style="color: #FF8C00">Description:</span></p><p>Remote-controlled digital-to-analog converter.</p><p></p><p><span style="color: #ff8c00">Digital inputs:</span></p><p>AES/EBU (XLR)</p><p>S/PDIF coaxial & optical</p><p>2 HDMI (stereo only)</p><p>USB 2.0</p><p>All support up to 24-bit/192kHz</p><p></p><p><span style="color: #ff8c00">Digital output:</span></p><p>HDMI.</p><p></p><p><span style="color: #ff8c00">Analog outputs:</span></p><p>left & right RCA (unbalanced)</p><p>left & right XLR (balanced)</p><p></p><p><span style="color: #ff8c00">Output impedance:</span></p><p>47 ohms (unbalanced)</p><p>110 ohms (balanced)</p><p></p><p><span style="color: #ff8c00">Output level:</span></p><p>2V RMS</p><p></p><p><span style="color: #ff8c00">Frequency response:</span></p><p>±0.5dB (ref. 20Hz-96kHz at 192kHz sample rate)</p><p></p><p><span style="color: #ff8c00">Signal/noise:</span></p><p>>125dB (ref. 0dBFS 2V out)</p><p></p><p><span style="color: #ff8c00">Channel separation:</span></p><p>>115dB (ref. 0dBFS volume β1dB)</p><p></p><p><span style="color: #ff8c00">AC supply:</span></p><p>100-240V, 50-60Hz</p><p></p><p><span style="color: #ff8c00">Power requirement:</span></p><p>16W</p><p></p><p><span style="color: #ff8c00">Dimensions:</span></p><p>17" (435mm) W by 3" (78mm) H by 11.5" (296mm) D</p><p></p><p><span style="color: #ff8c00">Weight:</span></p><p>12.8 lbs (5.8kg)</p><p></p><p></p><p></p><p></p><p></p><p></p><p>Το <span style="color: #ff8c00">βασικό χαρακτηριστικό</span> του εν λόγω μηχανακίου είναι το παρακάτω (quote από NAD):</p><p></p><p></p><p></p><p></p><p></p><p></p><p><span style="color: #ff8c00">Μετρήσεις</span> (απο το Stereophile)</p><p></p><p></p><p><strong>Impulse Response</strong> (4ms time window)</p><p></p><p><img src="http://cdn.stereophile.com/images/712NADfig01.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p></p><p></p><p><strong>Frequency Response</strong> at –12dBFS into 100k ohms with data sampled at: 44.1kHz (left channel cyan, right magenta), 96kHz (left blue, right green), 192kHz (left gray, right red) (0.5dB/vertical div.)</p><p></p><p><img src="http://cdn.stereophile.com/images/712NADfig02.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p></p><p></p><p><strong>1/3-Octave Spectrum</strong> with noise and spuriae of dithered 1kHz tone at –90dBFS, with: 16-bit data (top), 24-bit data (middle), dithered 1kHz tone at –120dBFS with 24-bit data (bottom) (right channel dashed)</p><p></p><p><img src="http://cdn.stereophile.com/images/712NADfig03.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p></p><p></p><p><strong>FFT-Derived Spectrum</strong> with noise and spuriae of dithered 1kHz tone at –90dBFS, with: <strong><span style="color: #FF8C00">16-bit data</span></strong> (left channel cyan, right magenta), 24-bit data (left blue, right red)</p><p></p><p><img src="http://cdn.stereophile.com/images/712NADfig04.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p></p><p></p><p>FFT-Derived Spectrum with noise and spuriae of dithered 1kHz tone at –90dBFS, with <strong><span style="color: #FF8C00">24-bit data</span></strong> vis USB (left blue, right red)</p><p></p><p><img src="http://cdn.stereophile.com/images/712NADfig05.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p></p><p></p><p><strong>Waveform of Undithered 1kHz sinewave</strong> at –90.31dBFS, <strong><span style="color: #FF8C00">16-bit data</span></strong> (left channel blue, right red)</p><p></p><p><img src="http://cdn.stereophile.com/images/712NADfig06.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p></p><p></p><p><strong>Waveform of undithered 1kHz sinewave</strong> at –90.31dBFS, <strong><span style="color: #FF8C00">24-bit data</span></strong> (left channel blue, right red)</p><p></p><p><img src="http://cdn.stereophile.com/images/712NADfig07.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p></p><p></p><p><strong>High-Resolution Jitter Spectrum</strong> of analog output signal, 11.025kHz at –6dBFS, sampled at 44.1kHz with LSB toggled at 229Hz: 16-bit data via TosLink from AP SYS2722 (left channel blue, right magenta), 24-bit data (left cyan, right red). Center frequency of trace, 11.025kHz; frequency range, ±3.5kHz</p><p></p><p><img src="http://cdn.stereophile.com/images/712NADfig14.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p></p><p></p><p></p><p>Σχόλιο για τις μετρήσεις του από το Stereophile: "NAD's M51 Direct Digital DAC offers measured performance that is almost beyond reproach. Color me impressed. <span style="color: #FF8C00">—John Atkinson</span>"</p><p></p><p></p><p></p><p></p><p></p><p></p><p></p><p></p><p>Ιδέα για να γράψω μια παρουσιασούλα του M51 ήταν ένα post του Chris1987, το οποίο δεν θυμάμαι κάν που και πότε αναφέρθηκε.</p><p></p><p>Έχει κανείς εμπειρία από το εν λόγω μηχανάκι?</p><p></p><p>DrPanK, μπας και έχεις ρίξει κανά ώτο ?</p><p></p><p></p><p>Τί σας λέει γενικώς το NADάκι?</p><p></p><p></p><p>Α, μην ξεχάσω: <strong>Price:</strong> <span style="color: #FF8C00">$2000</span></p><p></p><p></p><p></p><p>:ernaehrung004:</p></blockquote><p></p>
[QUOTE="Gojakla, post: 1057387935, member: 17289"] [SIZE=4][B]NAD M51 Direct Digital DAC[/B][/SIZE] [COLOR=#ff8c00]35-bit 844kHz DAC and Digital Preamp[/COLOR] [IMG]http://nadelectronics.com/img/img.php?140110102819-M51_Black_Front.jpg/1200[/IMG] [IMG]https://www.wifimedia.eu/images/M51DAC-600.jpg[/IMG] [URL="http://nadelectronics.com/products/masters-series/M51-Direct-Digital-DAC"]Επίσημη Σελίδα Προϊόντος[/URL] Ενδεικτικό review από [URL="http://www.stereophile.com/content/nad-m51-direct-digital-da-converter"]Stereophile[/URL]. [B]Specs:[/B] [COLOR=#FF8C00]Description:[/COLOR] Remote-controlled digital-to-analog converter. [COLOR=#ff8c00]Digital inputs:[/COLOR] AES/EBU (XLR) S/PDIF coaxial & optical 2 HDMI (stereo only) USB 2.0 All support up to 24-bit/192kHz [COLOR=#ff8c00]Digital output:[/COLOR] HDMI. [COLOR=#ff8c00]Analog outputs:[/COLOR] left & right RCA (unbalanced) left & right XLR (balanced) [COLOR=#ff8c00]Output impedance:[/COLOR] 47 ohms (unbalanced) 110 ohms (balanced) [COLOR=#ff8c00]Output level:[/COLOR] 2V RMS [COLOR=#ff8c00]Frequency response:[/COLOR] ±0.5dB (ref. 20Hz-96kHz at 192kHz sample rate) [COLOR=#ff8c00]Signal/noise:[/COLOR] >125dB (ref. 0dBFS 2V out) [COLOR=#ff8c00]Channel separation:[/COLOR] >115dB (ref. 0dBFS volume β1dB) [COLOR=#ff8c00]AC supply:[/COLOR] 100-240V, 50-60Hz [COLOR=#ff8c00]Power requirement:[/COLOR] 16W [COLOR=#ff8c00]Dimensions:[/COLOR] 17" (435mm) W by 3" (78mm) H by 11.5" (296mm) D [COLOR=#ff8c00]Weight:[/COLOR] 12.8 lbs (5.8kg) Το [COLOR=#ff8c00]βασικό χαρακτηριστικό[/COLOR] του εν λόγω μηχανακίου είναι το παρακάτω (quote από NAD): [COLOR=#ff8c00]Μετρήσεις[/COLOR] (απο το Stereophile) [B]Impulse Response[/B] (4ms time window) [IMG]http://cdn.stereophile.com/images/712NADfig01.jpg[/IMG] [B]Frequency Response[/B] at –12dBFS into 100k ohms with data sampled at: 44.1kHz (left channel cyan, right magenta), 96kHz (left blue, right green), 192kHz (left gray, right red) (0.5dB/vertical div.) [IMG]http://cdn.stereophile.com/images/712NADfig02.jpg[/IMG] [B]1/3-Octave Spectrum[/B] with noise and spuriae of dithered 1kHz tone at –90dBFS, with: 16-bit data (top), 24-bit data (middle), dithered 1kHz tone at –120dBFS with 24-bit data (bottom) (right channel dashed) [IMG]http://cdn.stereophile.com/images/712NADfig03.jpg[/IMG] [B]FFT-Derived Spectrum[/B] with noise and spuriae of dithered 1kHz tone at –90dBFS, with: [B][COLOR="#FF8C00"]16-bit data[/COLOR][/B] (left channel cyan, right magenta), 24-bit data (left blue, right red) [IMG]http://cdn.stereophile.com/images/712NADfig04.jpg[/IMG] FFT-Derived Spectrum with noise and spuriae of dithered 1kHz tone at –90dBFS, with [B][COLOR="#FF8C00"]24-bit data[/COLOR][/B] vis USB (left blue, right red) [IMG]http://cdn.stereophile.com/images/712NADfig05.jpg[/IMG] [B]Waveform of Undithered 1kHz sinewave[/B] at –90.31dBFS, [B][COLOR="#FF8C00"]16-bit data[/COLOR][/B] (left channel blue, right red) [IMG]http://cdn.stereophile.com/images/712NADfig06.jpg[/IMG] [B]Waveform of undithered 1kHz sinewave[/B] at –90.31dBFS, [B][COLOR="#FF8C00"]24-bit data[/COLOR][/B] (left channel blue, right red) [IMG]http://cdn.stereophile.com/images/712NADfig07.jpg[/IMG] [B]High-Resolution Jitter Spectrum[/B] of analog output signal, 11.025kHz at –6dBFS, sampled at 44.1kHz with LSB toggled at 229Hz: 16-bit data via TosLink from AP SYS2722 (left channel blue, right magenta), 24-bit data (left cyan, right red). Center frequency of trace, 11.025kHz; frequency range, ±3.5kHz [IMG]http://cdn.stereophile.com/images/712NADfig14.jpg[/IMG] Σχόλιο για τις μετρήσεις του από το Stereophile: "NAD's M51 Direct Digital DAC offers measured performance that is almost beyond reproach. Color me impressed. [COLOR="#FF8C00"]—John Atkinson[/COLOR]" Ιδέα για να γράψω μια παρουσιασούλα του M51 ήταν ένα post του Chris1987, το οποίο δεν θυμάμαι κάν που και πότε αναφέρθηκε. Έχει κανείς εμπειρία από το εν λόγω μηχανάκι? DrPanK, μπας και έχεις ρίξει κανά ώτο ? Τί σας λέει γενικώς το NADάκι? Α, μην ξεχάσω: [B]Price:[/B] [COLOR="#FF8C00"]$2000[/COLOR] :ernaehrung004: [/QUOTE]
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