Denon DCD-2500NE Reference CD/Super Audio CD Player Made In Japan

FEATURES - DCD-2500NE

Overview

Super Audio CD player
Premium Super Audio CD Player bringing disc playback performance to remarkable heights

• Advanced AL32 Processing + Ultra Precision 192kHz/32bit D/A Converter
• DAC Master Clock Circuit Design to suppress jitter and noise
• Direct Mechanical Ground Construction to minimize unwanted vibration
• Carefully designed construction, minimum signal paths and selected Hi-Fi parts to preserve audio signal purity
• Original drive mechanism, the heart of Denon’s digital disc playback technology, with Advanced S.V.H. loader
• Playback of CD, Super Audio CD, DSD (2.8 MHz / 5.6 MHz) files and PCM files up to 192 kHz / 24 bits recorded on DVD R/RW
• Twin Transformer for separated digital and analogue power supply
• Pure Direct Mode
• Digital optical, digital coaxial and analogue output

特點 - DCD-2500NE

Overview

擁有超卓播放表現之頂級 SACD 播放機

• Advanced AL32 Processing Plus 處理＋超精密 32bit/192kHz D/A 轉換器
• DAC 主時鐘線路設計，用以抑制時基誤差及雜訊
• 直接機械接地結構，減低不必要的震動
• 精心設計之結構、最短訊號傳輸路徑及精選 Hi-Fi 級零件，以保留聲音訊號純度
• Denon數碼光碟播放技術之核心，配備進階 S.V.H. 碟盤之驅動架構
• 支援播放 CD、SACD、燒錄於 DVD-R/RW 之 DSD（2.8 MHz / 5.6 MHz）檔案及最高 24bit/192kHz PCM 檔案
• 雙變壓器設計，數碼及模擬線路獨立供電
• Pure Direct 純直通模式
• 數碼光纖、數碼同軸及模擬輸出端子

Denon is one of the rare audio brands that continue to actively develop Hi-Fi components and accumulate, refine, and pass down Hi-Fi audio technologies. The 2500NE series, designed for today’s age, has been developed by both veteran engineers and talented young engineers who have inherited the Denon technologies and expertise that have been cultivated over many years and decades. The DCD-2500NE focuses on achieving the essence of a disc player: ultra-high precision in reading discs and supplying high-quality audio signals to the amp. To achieve this, the signal paths are as short as possible and the whole circuitry is minimized. The engineers also redesigned the disc drive mechanism brackets and the chassis to eliminate vibration, the great enemy of disc players, and achieve ultra-vibration-resistant performance. The information on the disc is now read with impeccable accuracy and a clean, high-grade signal is supplied to the DCD-2500NE’s Advanced AL32 Processing Plus circuitry. Besides CD and Super Audio CD playback, the DCD features playback of audio recordings up to PCM192/24 or DSD5.6 recorded on a DVD R/RW for full flexibility and extended access to high resolution audio.

Denon 是少有的音響品牌持續而積極地開發 Hi-Fi 器材，從而積累、精煉及傳承 Hi-Fi 音響技術。專為當今時代而設的 2500NE 系列，是由資深工程師聯同經過多年栽培、傳承著Denon技術及專業知識之年輕工程師共同開發。DCD-2500NE 著重於實現一部光碟播放機的精髓：以超高精確度讀取光碟，並為擴音機提供高質素聲音效號。為實現這一點，此機的訊號傳輸路徑盡可能縮短，整個線路亦經最小化。工程師亦重新設計光碟驅動架構的支架及箱體，去消除光碟播放機的大敵：震動，從而實現超耐震特性。光碟中的資訊將會以無可挑剔的精確度及清晰度讀取，從而為 DCD-2500NE 的 Advanced AL32 Processing Plus 線路提供高質素訊號。除支援播放 CD 及 SACD 之外，此機更兼容播放儲存於 DVD-R/RW 、最高 24bit/192kHz PCM 或 DSD5.6 的音樂訊號，令 DCD-2500NE 擁有充分的靈活性去對應 Hi-Res Audio 高解像音樂。

Advanced S.V.H. Mechanism, Denon’s original disc drive design

The DCD-2500NE’s disc drive design contains reference-class Advanced S.V.H. (Suppress Vibration Hybrid) Mechanism. The circuitry that controls the pickup and decodes the signals read from the disc has been newly developed. Signal paths have been shortened to an absolute minimum and circuits have been miniaturized to ensure that excess current or noise will not occur. The various parts of the mechanism have been made with different materials such as a combination of stainless and copper plating for the top panel to strengthen rigidity, diecast aluminum for the disc tray, and 2mm thick steel for the mechanism brackets. Improvements in high-mass, vibration-resistant properties and the dispersal of resonation points contribute to a high level of vibration resistance. In addition, the mechanism’s low center of gravity suppresses any vibration occurring inside the mechanism due to disc rotation, and the mechanism structure also effectively suppresses external vibration. By eliminating unwanted vibration, servo-related operations are minimized, and by also minimizing unnecessary controls and current consumption, digital signals can be read from the disc with optimum accuracy under stable conditions.

Denon 自家光碟驅動設計，進階 S.V.H. 碟盤架構

DCD-2500NE 光碟驅動設計，包含示範級進階 S.V.H. (Suppress Vibration Hybrid) 碟盤架構。控制讀取光碟時拾訊及解讀訊號的線路亦是全新開發。將訊號傳輸路徑縮到最短及線路的小型化，確保不會有過量電流及雜訊產生。該架構的不同部分以不同的物料製成，例如頂板就採用鍍銅不銹鋼組合而成，以加強其堅硬度；至於碟盤則用上壓鑄鋁，並配搭 2mm 厚鋼質托架。結合高質量、高抗振特性及分散共振點的優勢，從而提供高水平的抑振效果。此外，這種碟盤架構採用低重心設計，可以有效抑制所有因光碟該轉而造成的任何振動，而該種架構更可有效抑制外來振動。透過消除不必要的振動，伺服相關的操作可以減至最少，從而減少不必要的操作及電流消耗，令數碼訊號可以在更穩定而精準的狀態下從光碟中讀取。

DAC Master Clock Design

To accurately synchronize digital circuits, the DCD-2500NE’s DAC Master Clock Design treats the DAC as the master when clock signals are supplied. Positioning the master clock immediately adjacent to the D/A converter (DAC) suppresses jitter and ensures optimum precision in D/A conversion. In addition, the quality of the clock, which becomes the reference for semiconductor operation, is extremely important for ensuring that the digital audio circuitry performs at its maximum potential. The DCD-2500NE thus employs a clock oscillator to dramatically reduce phase noise that is the displacement of frequencies. The clock power circuit has also been vastly improved to bring out the full potential of the high-quality clock’s performance. A conductive polymer capacitor with particularly outstanding high-frequency impedance characteristics for Denon’s renowned sound quality has been placed at the base of the clock’s power source, and an ultra-compact film capacitor that is different from layered ceramic capacitors has been placed close to the clock, to achieve an improved S/N ratio and a transparent sound with superior spatial expression. The DCD-2500NE is equipped with two clock oscillators, one for each sampling frequency (44.1 kHz and 48 kHz), that can be switched between the frequencies to thoroughly suppress jitter.

DAC 主時鐘設計

為更準確地與數碼線路同步，DCD-2500NE 採用 DAC 主時鐘設計，當提供時鐘訊號時，DAC 將會充當為主時鐘。將主時鐘緊鄰著 DAC，能夠抑制時基誤差，並確保最精確的 D/A 轉換。此外，時鐘的質素，亦即半導體運作的根據，對於數碼聲音線路能否發揮出所有潛能至關重要。DCD-2500NE 採用時鐘晶振去大幅降低頻率偏移造成的相位雜訊。時鐘的供電線路也得到極大的改善，去將高質素時鐘的所有潛能全面發揮。在時鐘供電上採用具備優秀高頻阻抗特性的導電聚合物電容，令此機得而呈現 Denon 聞名的聲音質素。有別於多層陶瓷電容，一個超小型薄膜電容置放於靠近時鐘的位置，用以改善 S/N 比例，從而提供更通透而具優異空間感的聲音。DCD-2500NE 配備兩組時鐘晶振，每種取樣率頻各有一組（44.1kHz 及 48kHz），並在不同頻率之間互相切換，藉此徹底抑制時基誤差。

Advanced AL32 Processing Plus

The DCD-2500NE is equipped with Advanced AL32 Processing Plus, the latest version of Denon’s analogue waveform reproduction technology which utilizes unique data interpolation algorithms and also supports high-resolution sound sources. These algorithms interpolate points that should exist before and after the points in large quantities of data to achieve a smooth waveform that is close to that of the original signal. By carefully restoring data that was lost during digital recording, the resulting playback sound is highly detailed, free of interference, accurately localized, richly expressive in the lower range, and beautifully faithful to the original sound.

Advanced AL32 Processing Plus

DCD-2500NE 配備 Advanced AL32 Processing Plus, Denon 最新版本之模擬波形再造技 術，此技術採用獨特的數碼插值演算法，兼且能夠支援 Hi-Res Audio 高解像音樂訊源。這種演算法會在大量數據點的前後位置，加插原應存在的數據點，從而實現更接近原來訊號的順滑波形。透過仔細地還原因數碼錄音而流失的數據，從而令重播的聲音能夠變得更為仔細，並有更準確的定位、更飽滿的低頻，令播放的聲音更貼近原音。

Independent digital and analog power transformers

The power units for the digital and analog circuits, whose signals have different characteristics, have separate transformers to eliminate mutual interference and noise. An aluminum plate has also been combined to the underside of the steel transformer base to strengthen rigidity.

獨立數碼及模擬電源變壓器

訊號各有特點的數碼及模擬線路，就由單獨變壓器為其供電，以消除相互干擾及噪音。電源變壓器的鋼質底板中加入鋁板，以加強整體堅固度。

Dedicated power unit for analogue audio circuitry

A newly developed original Denon large-capacity (3300 µF) block capacitor is used for the power unit of the analog audio circuitry after the D/A converter. The DCD-2500NE is also endowed with custom parts, such as high-sound-quality electrolytic capacitors and polyphenylene sulfide capacitors, which have been co-developed with parts manufacturers through an extensive regimen of repeated listening tests. These parts enable a clean yet robust, stable supply of power, resulting in a sound that is delightfully balanced between a strong foundation and delicate details.

模擬音效線路專屬供電

Denon 自家研發的全新大容量（3300 µF）電容，用於 D/A 轉換器之後的模擬線路供電裝置。DCD-2500NE 更配備定制零件，包括高音質電解電容，與及與零件製造商共同開發、並通過廣泛反複的聽力測試之聚苯硫電容。上述零件可確保通透、強大而穩定的電源供應，聲音得以在強橫力量感與細膩細節之間取得絕對平衡。

Circuitry with minimized signal paths

The “simple & straight” design philosophy has been thoroughly implemented in all of the DCD-2500NE’s circuits. Circuit patterns have been redesigned from the ground up to make signal paths as short as possible and ensure that the original sound is faithfully reproduced across the sonic spectrum. As a result, interference between circuits and between left and right channels as well as adverse influences on audio signals are minimized, producing a clean, highly transparent sound.

最短訊號傳輸路徑電路

DCD-2500NE 所有內部線路，均徹底執行「簡單＆直接」的設計理念。線路圖從根本上重新設計，令訊號路徑盡可能縮短，確保原音能夠忠實重現。結果是線路與線路之間，與及左右聲道之間對聲音訊號不利的干擾能夠降至最低， 從而產生一個高清晰而通透的聲音。

Direct Mechanical Ground Construction

The integrity of musical signals deteriorates when they are subject to internal vibration caused by disc rotation or the power transformer, or to airborne vibration caused by sound pressure from the speakers. To guard against such influences, Denon engineers designed a vibration suppression structure they called “Direct Mechanical Ground Construction”. In this design, the power transformers – themselves a source of vibration – have been placed close to the feet of the DCD-2500NE where unwanted vibration is funneled directly to the ground and prevented from affecting nearby circuitry. Also, by placing the drive mechanism – the part with the greatest mass – low in the center of the chassis, the low center of gravity effectively absorbs internal vibration caused by disc rotation and also protects the mechanism from external vibration. To further shut out external vibration, the 1.2mm thick main chassis has been reinforced with two 1.6mm thick steel plates to produce a highly rigid three-layer structure with sufficient vibration-resistant mass.

直接機械接地結構

光碟轉動、電源變壓器會導致內部振動，而來自喇叭的聲壓亦會造成空氣振動，從而劣化音樂訊號的完整性。為了防止上述影響，Denon 工程師設計出一種名為「直接機械接地結構」的抑振結構。這種結構會將本身的振動主要來源：電源變壓器，置放於接近 DCD-2500NE 的機腳位置，令不必要的振動直接釋放到地面，藉此避免影響到周圍的線路。 此外，透過將質量最高的驅動碟盤架構，置放於底盤的中央位置，這種低重心設計可更有效地吸收光碟轉動時引致的內部振動，亦可以防止外來振動影響內部架構。為進一步消除外部振動，1.2mm 厚的主底盤就嵌上1.6mm 厚鋼板作強化，用以提供足夠抑振質量的三層式結構。

BMC feet

The feet that support the hefty drive mechanism, power transformers, and the heavy weight of the chassis are made of high-density, highly rigid Bulk Molding Compound (BMC). Rigidity has been strengthened with the addition of fiberglass to the BMC material. High-density felt of a variety and thickness selected from a wide range of materials that were tested has been mounted at the bottom of the feet. The overall foot design provides further protection from vibration, and careful sound quality tuning has also been implemented.

BMC機腳

機腳採用高硬度團狀模塑膠（BMC）製成，用以承托沉重的驅動碟盤、電源變壓器及底盤。為進一步加強機腳的堅硬度，廠商就在團狀模塑膠物料中注入玻璃纖維。高密度機腳底部物料的種類及厚度，亦經過廣泛測試。上述種種措施，目的是令機腳整體能夠進一步抗止振動，並藉此作更細緻的調音。

DSD data disc playback support

In addition to CD and Super Audio CD, the DCD-2500NE can play DSD (2.8 Mhz / 5.6 MHz) files and high-resolution files up to 192 kHz / 24 bits recorded on DVD-R/RW and DVD+R/RW discs. Music files with sampling frequencies of up to 48 kHz recorded on CD-R/RW discs can also be played.

對應播放 DSD 數據光碟

除對應 CD 及 SACD 之外，DCD-2500NE 更能夠播放儲存於 DVD-R/RW 及 DVD+R/RW 光碟之 DSD（2.8 Mhz / 5.6 MHz）檔案及最高 24bit/192kHz Hi-Res Audio 高解像音樂檔 。儲存於 CD-R/RW 光碟、最高48kHz取樣率的音樂檔案，亦可在此機上播放。

Aluminum top remote controller that can also operate the amp

The DCD-2500NE comes with an aluminum top remote control unit that can also operate the PMA-2500NE and other Denon amps.

可同時操作擴音機的鋁製遙控器。

DCD-2500NE 隨機附設鋁製遙控器，該遙控器同時可用作操控 PMA-2500NE 及其他 Denon 擴音機。