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使用這種 JVC 技術的 CD
在市面上好像有兩種級距

一種是 XRCD
另一種是標示了同為 JVC K2 20bit Super Coding 技術的 logo
但卻不說自己是 XRCD
兩者價格差了一截　類型也有區別
前者常常要上千元　多古典樂
後者大概和一般唱片等價　多流行樂
當然　兩者的最終產物都是給傳統 CDP 播放的規格
我實在不解兩者的區別　本是同根生　相差何太貴
煩請高人開惑

K2 20Bit：

是由日本JVC獨家開發之技術∼包含了20Bit, 128 times over-sampling

high resolution analog to digital converter、super coding (將20Bit的

資料在不影響完整性的條件下轉換成16Bit的資料)、K2 Interface (減低資料

傳輸中的jitter) 等處理。K2 20Bit技術揚棄一般CD「將原始盤帶轉成數位母帶，

再以數位母帶製作CD」的製作步驟，採用20Bit，128倍取樣類比/數位的轉換技術，

將原始盤帶之類比訊號轉換成數位訊號，直接編碼製作成CD，可防止一般CD製作

過程之訊號損失。而20Bit高密度編碼，擷取訊號數量是一般16Bit CD的16倍！

完整保留低頻訊號原貌，並減少CD最數位訊號間隙，使音質更加圓潤細膩，更接近母帶的品質。


XRCD：

XRCD也是使用JVC獨家開發的K2 20Bit技術 (超級數字編碼器，進行類比/數位

的轉換等等)。我想XRCD比較不同的是他還有K2刻盤、K2壓片 (K2 laser cutting)

的步驟 (看看上圖就知道了 )，全由JVC位於橫濱的工廠內進行，中間絕不假手他人。

爾後的每個環節，JVC在時鐘位準與電源淨化上都下了更多功夫，確保數位訊號

不受任何干擾。因為製作過程更為嚴謹繁瑣，XRCD才會賣得如此昂貴......

這個應該說是全套跟單點的差異吧，單純只用K2可能效果還是有限，不然看看XRCD處理與生產的陣丈，還真的是不小。

國內唱片倒是頗能臉不紅氣不喘地打上 XRCD 招牌
蔡阿姨等等都有長銷的 XRCD 版本
這是全套還是半套？
聽起來…　嗯…　我的器材不夠好吧

如版主大人所說全套只在自家做的話
不就得把母盤送到 JVC 橫濱廠
把蔡阿姨母盤長途運送會讓許多人擔心飯碗吧…
頂多也只能送個不知品質如何的 copy 愈想愈偏了

DAC 寫:國內唱片倒是頗能臉不紅氣不喘地打上 XRCD 招牌
蔡阿姨等等都有長銷的 XRCD 版本
這是全套還是半套？
聽起來…　嗯…　我的器材不夠好吧

如版主大人所說全套只在自家做的話
不就得把母盤送到 JVC 橫濱廠
把蔡阿姨母盤長途運送會讓許多人擔心飯碗吧…
頂多也只能送個不知品質如何的 copy 愈想愈偏了

JVC的網頁 http://www.xrcd.net/shopping/process.asp

上面有一些描述可以讓大家對於XRCD有更進一步的認識∼

In most cases, after a record has been mastered, a U-matic 1630 format tape is prepared and shipped to the manufacturing plant. At this point the artist, producer, and engineers can only hope that their work will return to them in a relatively unchanged form. This manufacturing chain is not standardized, and while digitally correct, does not always reproduce the highest audio quality possible. Since the manufacturing process works as a number of components linked together in series, the overall performance can only be limited by each stage. This means that extreme care and attention must be paid to every aspect of mastering and manufacturing to get the most out of the process.

JVC has painstakingly gone through every step of the mastering and manufacturing process with the goal of retaining the highest sonic purity of the original music. This was accomplished not by just measuring the results, but in extensive listening tests to determine the best configuration. Every combination of equipment, connections , AC power regulation, word clock distribution, mastering format, delivery system and compact disc construction was tested. The results is the xrcd, a compact disc that offers clearer definition, more accurate imaging, and higher audio quality than any compact disc before.

內容大概強調從頭到尾，單一生產製造過程，掌控許多環節，以達到最高品質，

並且有和母帶比較聲音的測試，來取得最佳化設定。

XRCD的製作確實比起一般CD來得嚴謹考究∼理論上應該更接近原始母帶的效果。

然而結果是能否聽得出差別？聲音的風格是否能被接受？以聲論價，真的值得嗎？

小弟我想每個人的觀點不盡相同！

Argerich 寫:

DAC 寫:國內唱片倒是頗能臉不紅氣不喘地打上 XRCD 招牌
蔡阿姨等等都有長銷的 XRCD 版本
這是全套還是半套？
聽起來…　嗯…　我的器材不夠好吧

如版主大人所說全套只在自家做的話
不就得把母盤送到 JVC 橫濱廠
把蔡阿姨母盤長途運送會讓許多人擔心飯碗吧…
頂多也只能送個不知品質如何的 copy 愈想愈偏了

JVC的網頁 http://www.xrcd.net/shopping/process.asp

上面有一些描述可以讓大家對於XRCD有更進一步的認識∼

In most cases, after a record has been mastered, a U-matic 1630 format tape is prepared and shipped to the manufacturing plant. At this point the artist, producer, and engineers can only hope that their work will return to them in a relatively unchanged form. This manufacturing chain is not standardized, and while digitally correct, does not always reproduce the highest audio quality possible. Since the manufacturing process works as a number of components linked together in series, the overall performance can only be limited by each stage. This means that extreme care and attention must be paid to every aspect of mastering and manufacturing to get the most out of the process.

JVC has painstakingly gone through every step of the mastering and manufacturing process with the goal of retaining the highest sonic purity of the original music. This was accomplished not by just measuring the results, but in extensive listening tests to determine the best configuration. Every combination of equipment, connections , AC power regulation, word clock distribution, mastering format, delivery system and compact disc construction was tested. The results is the xrcd, a compact disc that offers clearer definition, more accurate imaging, and higher audio quality than any compact disc before.

內容大概強調從頭到尾，單一生產製造過程，掌控許多環節，以達到最高品質，

並且有和母帶比較聲音的測試，來取得最佳化設定。

XRCD的製作確實比起一般CD來得嚴謹考究∼理論上應該更接近原始母帶的效果。

然而結果是能否聽得出差別？聲音的風格是否能被接受？以聲論價，真的值得嗎？

小弟我想每個人的觀點不盡相同！

那版主大大..你認為買XRCD到底值不值得?就以上述的三個問號來當做題目好了~

事實上蔡阿姨我比較喜歡一般CD版

XRCD版的嘴巴太大了

樂器也會變大隻

當然剛聽幾次會覺得很好聽很爽

但是容易疲勞