產品:nuForce uDAC-2

版本:Version 2

官網:http://www.nuforce.com

先前在想,有一個外接耳擴+加上耳機連接電腦

如果換過電腦後這台耳擴依然可以延續使用

省錢省麻煩

所以這時老闆推薦這台

主要是因為由音效卡推到擴大機後出來的聲音就是有音噪,所以需要用的耳機的我特別會注意到耳噪問題,而且這台只要連接XP以上的系統就系統會自動抓取,不用在額外驅動程式安裝,聽說晶片也是他們自行研發與外面常用的晶片不同

Nuforce 的 uDAC-2 是 同廠型號 uDAC 的升級版。經USB線連接電腦,即可把電腦的數碼輸出轉換成一般CD機模擬音頻輸出(RCA接口、2 volt);配合家中立體聲糸統,書桌糸統或耳機,即可享用電腦聽歌的無比便利與樂趣。音效表現一點也不俗,可比美甚至超越眾多 Hi-Fi 級 CD唱機。此外,還備有同軸(co-axial)數碼輸出接口,方便一些發燒用家連接家中的Hi-Fi級CD解碼使用。小巧精密,用途廣泛,音效出色,絕對可滿足不同高要求用家的需要。

 uDAC-2靚聲的祕技,除了採用了Nuforce 高速Turbo加壓充電及濾波線路,還採用了著名BB公司最新的24bit/96KHz解碼芯片。內置耳機放大部份也改良了。此外,還用上了比uDAC優勝的高線性TOCOS音量控制,大幅提高了弱音部份的左右聲道分隔能力。

產品特性:

  • ·    獨立USB數碼接收器及獨立DAC碼解
  • ·    同軸S/PDIF數碼輸出(關掉音量控制即可啟動)
  • ·    雙重jitter(時差)斗正糸統,其一設於數據接收,另一設於升頻處理部份
  • ·    高電平 (2V),模擬訊號輸出
  • ·    高線性TOCOS音量控制線路,有效改善弱音部份的左右聲道分隔能力
  • ·    音頻部份線路中,絕無電容交連
  • ·    低電秏;只用上USB內置微弱供電
  • ·    USB供電,無需額外供電變壓器
  • ·    可配合阻抗為16-300 Ohm 的耳機使用
  • udac2_illus_earphones_600px.jpg 
  • udac2_illus_stereo_600px.jpg  

輸入規格:

  • ·    USB
  • ·    兼容,USB原生碼率:32-48kHz, 16bit, 及 96kHz, 24-bit
  • ·    最大取樣率:96kHz
  • ·    解析度:24-bits

輸出規格:

  • ·    類比RCA輸出=2Vrms
  • ·    動態範圍:110dB
  • ·    總諧波失真= -95 dB
  • ·    訊噪率>98dB
  • ·    數碼輸出:同軸RCA 75-ohm
  • ·     

耳機輸出端子:

  • ·    輸出功率:80mW x 2 @16 Ohm
  • ·    耳機阻抗:16-300 ohm

電力:USB供電

體積:68x38x21mm

網址: www.nuforce.com

 

A must-have laptop companion! Discover digital music's true headphone 
   
potential


NuForce uDAC-2 is a high-performance 24bit/96kHz USB Digital Audio Converter (DAC) that connects your personal computer's audio to your home stereo, desktop sound system, or headphones. The quality and versatility of the uDAC-2's performance belie its diminutive size. With its extensive power supply, filtering capabilities and charge-pump circuit as a foundation, the uDAC-2 processes incoming data via a USB audio receiver. A D/A converter chip then translates the data to a two-volt analog signal. The NuForce uDAC-2's performance equals or exceeds that of a great many audiophile CD players. The unit's exemplary flexibility -- analog RCA, digital coaxial, and high-performance headphone outputs -- is bound to satisfy the needs of the most critical music lover.

As a step above the uDAC, the uDAC-2 boasts a highly linear TOCOS volume control for improved channel tracking at low listening levels in addition to 24bit/96kHz USB DAC and an improved headphone amp.

* iPAD with iOS 4.2.1 works with uDAC-2 provided that a powered USB hub is used between an iPAD and the uDAC-2.

* If you're using the Icon uDAC-2 with sensitive in-ear earphones and listening at low volume, please read this article about channel imbalance issues.

Note1. The uDAC-2 is designed for consumer playback of digital music. It has not been calibrated for professional recording. At the 9 o'clock volume indicator, there is hardly any signal; further, analog pots do not behave reliably. At normal listening levels, the volume tracking is within 1dB.

Note2. The uDAC-2 volume max out at around 0dB input (maximum digital input) with THD+N around 1% is intentional, i.e., targeting the voltage rail limit in order to achieve the loudest possible, yet un-distorted, music playback. Short of 1% THD at 0dB input, we are not fully implementing our voltage limit, which translates in practical terms to a diminished volume range for music.

 


Specifications
Input
  • USB (USB 1.1, 2.0 compatible)
  • USB DAC: USB 1.1, 2.0 compatible. USB native bit rate: 32, 44.1, 48, and 96 kHz, 24-bit
  • Maximum sampling rate: 96kHz
  • Resolution: 24-bits
Output
  • Analog RCA Output = 2Vrms
  • Dynamic Range: 90dB
  • S/N Ratio: 98dB
  • THD+N 0.05%
  • Digital Output: coaxial RCA 75-ohm
  • Headphone output jack
    • Power output: 80mW x 2 @ 16-Ohm
    • Headphone impedance 16-300 Ohm
Frequency Response
  • 20-20kHz
Power
  • USB Bus Powered, 80 mA/5V
  • Maximum power consumption: 500mW
Dimensions
  • 68x38x21mm

有三款顏色
小猴子拔拔我選擇的是銀色

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夠薄吧!

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Snap1.jpg  

結論:

優點:

1. 耳擴可以直接接到PC USB不用拆殼安裝

2. 不用安裝驅動程式即差即用

3. 體積小

4. 用耳罩時沒有聽到音噪

5. 不用外接電源

6. 可以再外接到擴大機

如果沒有音噪問題小猴子拔拔我還是會選擇利用擴大機方式輸出,但是還是需要搭配厲害的音效卡,所花費的成本考可能就會提高,因此還是放棄

以一般使用這是經濟永久性也可以攜帶的產品

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