【DAC】Jeff Rowland Aeris DAC

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代理商一到貨馬上就通知
全新未拆，真是優的！
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上面牛皮信封是彩色的產品說明
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Jeff Rowland代理商是....歐美 (請務必買公司貨喔！)
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劃下第一刀，開了！
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白色盒子主要應該是配件包，打開馬上看到原廠的保證書
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裡面有遙控器、電源線、專用DC電源線、數位線
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遙控器質感真優，還沒看到Aeris本體，就可感覺到Jeff Rowland的實力！
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Aeris電源分離的DC電源供應
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紅色的布包著Aeris本體
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Aeris本體的質感真是太威了...
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這就是Jeff Rowland，無可取代的外觀工藝，多年來仍然在High End市場具有絕對的指標性
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這個平衡端子母座若沒記錯應該是Cardas的Clear系列，我再確認一下
質感超級優
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數位輸入介面非常齊全，除了USB是24/96外，其他都可解到24/192
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面板的指示燈都不同顏色搭配起來，很有Fu
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先用Mac透過USB來播放
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Jeff Rowland這次遙控器改變很大，比較之前有質感太多了！

晚上弄個轉接頭來聽看看原廠同軸線與介面的聲音.....

期待小葉哥分享聽感，這外觀跟concerto真是很搭耶，不知道尺寸是否跟concerto一樣？讓小弟想買回concerto簡單聽音樂了。

序號似乎刻意模糊掉，歐美不會拿回去當新品賣吧，國外雜誌或網站都會寫出評論機器的序號！因為我曾經接手過兩次友站××醫生評論過還給代理商的器材，代理商竟然當新品賣給我，兩件都被我識破，沒有惡意只是有前車之鑑想替未來的買家把個關！如有冒犯尚請見諒

這是我長久以來的習慣 (很久以前就這樣了)
是不是新品，以燒友這麼聰明
我想不難判斷才是
本篇開箱的圖片也可以對照出來

今天接上了原廠的BNC線，不過我的CD端是RCA數位同軸
因此要用RCA轉BNC的頭

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好威的外觀! 葉大煩請實測一下各種端子 評比一下建議使用者用那些介面較優~

內外質感一樣超級威！

全航太鋁挖空，用料一級棒，包括了高檔的瑞典LUNDAHL變壓器 (別忘了Aeris電源是分離的喔，AC轉DC供電)
處理中心晶片為xilinx spartan xc3s400、AKM AK4113VF、TAS1020 USB解碼、AD1853、AD1895A

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全航太鋁挖空，用料一級棒, 讓小弟第一個聯想到 FURUTECH/Acoustic Revive RTP-6N 系列排插
http://blog.yam.com/hifihivi/article/19397080 :P

很多機器都用那種模組化的插pin
看了真的心涼了一半
因為就自己買電源供應器的經驗
那些插pin的品質真的是很不勘
當然不能一概而論
但總覺得發燒的東西，不應該這麼做...
不知道各位前輩覺得如何？？

???

Aeris兩個地方用上排線非常正常與合理
(1) 面板控制連接
(2) DC電源供電

至於類比輸出的部份，只是PCB板那邊的頭用上更為穩固而已，線與pin還是很High End的

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Introducing the Aeris DAC

Based upon an asynchronous buffer, voltage controlled crystal oscillators and a 24-bit D/A converter – under the precise control of a FPGA running proprietary algorithms – the Aeris DAC delivers bit perfect conversion and reduces total jitter to less than 10 picoseconds RMS from any input.
IsoSyncECS

使用非同步緩衝、電壓控制石英振盪產生器，與FPGA架構下24Bit D/A轉換，時基誤差低於10 picoseconds (任何形式的輸入)！

Isolated Synchronous Error Correction System. Based upon an asynchronous buffer, voltage controlled crystal oscillators, and a 24 bit D/A converter – all under the precise control of an FPGA (Field Programmable Gate Array) running proprietary algorithms.
隔離同步錯誤修正系統

Bit Perfect and Virtually Jitter Free
Bit perfect conversion with total jitter output noise of less than 10 picoseconds RMS from any input – USB, TOSLINK, and SPDIF.

Multi-Stage Isolated Power Supply
Main power supply is isolated inside an external machined aluminum chassis. Eleven precision high-speed regulators provide low impedance and low noise “point of load” DC current to all analogue and digital circuits.
多級的隔離電源供應

Isolated Audio and Digital Circuitry
Left and right channel audio output circuits, digital processing, and D/A conversion circuits are isolated within individual milled aluminum pockets resulting in exceptional EMI shielding, and thermal stabilization.
類比與數位線路隔離

Volume Control
Wide range level control of outputs permit direct connection to power amplifiers.
有音控可直入後級

Driver-Free Operation
The USB interface requires no additional drivers to install or maintain/update.
USB不需要額外的驅動程式

Cross-Platform
The USB interface is plug-n-play with all operating systems, including PC, Mac, or Linux.

Machined Aluminum Chassis
Precision-machined chassis milled from a solid block of aircraft grade 6061-T6 aluminum, provides exceptional thermal stability, RFI/EMI shielding, and resonance control.
航太等級的鋁機殼

6-Layer Circuit Boards
Multi-layer circuit boards provide extremely low impedance ground and power distribution for remarkably low digital noise contamination.
6層的線路架構

High-Precision Surface Mount Components
Extensive use of Lead (Pb)-free, low temperature coefficient, active and passive surface-mount components results in significantly smaller loop areas, reduced circuit capacitance and inductance, and introduces less noise than conventional leaded components.

Transformer Coupled Outputs
Transformer balanced XLR line outputs provide outstanding output common-mode noise rejection, eliminate potential ground loops, and ensure compatibility with other equipment.

Output Connectors
Rhodium / Teflon Cardas output connectors for both balanced and unbalanced outputs preserve maximum audio signal integrity. Remote Control Allows remote control of volume, mute, standby, and input selection.

Inputs
USB 24/96
Toslink 24/192
SPDIF 24/192

Outputs
XLR 7 volts RMS max
RCA

Volume Control
Dual-stage attenuation (70 dB range, plus 20 dB overdrive)

Clocks (2X)
20 bit dynamic range Voltage Controlled Crystal Oscillators (VCXO)
44.14 kHz, 48 kHz (<1 picosecond RMS jitter)

D/A
24/352.8, differential output

Output Impedance
120 ohms

Aeris的背景蠻黑的，可以說是黑的出色，定位質感各方面也表現相當有水準
中頻密度相對稍高一些，是讓人討喜的非常淡的甜味
高頻尚未Run透，目前延伸稍為含蓄

USB DAC的部份原廠為了便利性不用灌驅動程式，使用了較為普通的晶片，雖然已有Jeff Rowlrand的調音與加持
但明顯的聲音不如同軸的好聽，不過USB的聲音也已算上High End的水準了

當然更加分的地方有
1. 超優的完成度質感，包括整個航太鋁挖空的箱體、超精美Jeff Rowland典型的波浪加工技術與質感非常棒的Cardas端子
2. DC電源分離供電設計
3. Jeff Rowland的品牌地位
4. 相對合理的價格

Aeris有其很大的魅力....

有趣的设计。
jeff rowland的思路总与linn有相似之处。
很想一问THOMAS HOLM, 为何会用ad1853这颗少见的芯(相对于一般都用的ad1955)?