ARC  Audio Research  VSI60合并胆机《上实物照片了》 [复制链接]

http://www.audioresearch.com/VSi60.html

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The VSi60 clearly proves that you do not have to spend a fortune to enjoy truly great sound at home. Built by hand in Plymouth, Minnesota, to the same exacting standards as our renowned Reference series, the VSi60 offers remarkable sound quality and value.
Its rated output of 50 watts per channel does not convey the VSi60's ability to drive power-hungry, low-impedance loudspeakers. We designed the VSi60 with the finest full-range speakers, not compact monitors. Dynamics are lifelike with a sense of ease normally associated with larger amplifiers. Yes, its resolving power is surprising, allowing you to hear details that were previously hidden in your recordings, but that resolution is in service of the music — grainless, tonally accurate and refined.
Physically, the VSi60 is 14" W x 8" H x 16" D, with a milled, anodized natural top plate with an inset Audio Research logo. On the front there are function and volume LEDs on the left, and soft touch buttons on the right mimicking the layout of our SP17 preamp. The display is available with either a black or a silver finish. The supplied remote controls all functions including power, muting, stereo/mono, input select, and volume up/down.
The rear of the chassis has five pairs of single-ended inputs labeled CD, Tuner, Video, SE1 and SE2; a (full-range) mono subwoofer output; voltmeter test points for setting bias; 0-4-8 ohm, gold plated brass five-way binding posts, and a very high quality detachable line cord. An optional perforated cage-type top cover, specific to the VS60/VSi60, is available at extra cost.
The control section of the VSi60 is passive, utilizing microprocessor-controlled relays. The high performance input relay paths are especially short, the same as those in Reference preamplifiers. The microprocessor control remembers the last input selected and the stereo/mono setting when the unit is powered down. Upon turn-on there is an automatic 30-second warm-up mute, with the volume control reset to zero to avoid possible unwanted surprises. The active circuitry is essentially that of the VS60, but with more gain for greater sensitivity. The preamplifier and amplifier sections cannot be separated.
The VSi60 has a new JFET input stage for low noise, with 6H30 driver tubes. The Svetlana 6550C output tube is used, the same as our other vacuum tube amplifiers. Build quality is typical Audio Research, utilizing thick traces on heavy, plated-through circuit boards, the finest audiophile-grade parts, proprietary litz internal wires, and the VSi60 is completely hand-soldered, assembled, tested and packed by craftspeople in our own facility. No production shortcuts have been taken. We are very proud of the VSi60 because we feel it provides the finest performance available anywhere near its price. Please contact your nearest Audio Research dealer to audition this affordable new integrated vacuum-tube amplifier.

VSi60合并放大器：

功率输出: 50 watts per channel continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 1.5% at 50 watts, .05% at 1 watt.
频响范围: (-3dB points at 1 watt)    1.0Hz to 80 kHz.
输入灵敏度: 0.47V RMS Single-ended for rated output. (32.5dB gain into 8 ohms.)
输入阻抗: 50K ohms Single-ended.
输入端子 (5): CD, Tuner, Video, SE1, SE2 (Single Ended RCA connectors).
最大输入: 3.5V RMS (any input).

输出相位: Non-Inverting (any input).
按键: Volume up, volume down. (103 steps, 20 LED indicators), Input, Mono, Mute, Power. All functions on IR remote control.
输出端子: 8 ohms, 4 ohms.
单声道超低音输出: 1V RMS at rated power.
负反馈量: 7dB.
哼声和噪音: Less thatn 0.1mV RMS — 106dB beow rated output (IHF weighted, Vol down).
电源供应: Electronically regulated Low and High voltage supplies for input stages. Automatic 30 sec. warm-up/brown-out mute.

电源供应 
Approximately 166 joules.
电源要求: 100-125VAC 60 Hz (200-250VAC 50Hz) 300 watts at rated output, 500 watts maximum, 200 watts at "idle".
电子管搭配:
2 — Matched pair 6550. Power Output: 2-6H30 driver.
尺寸: 14" (35.6 cm) W x 8" (20.3 cm) H x 16"(40.6 cm) D. Rear connectors extend .88" beyond chassis.
重量: 34.8 lbs. (15.8 kg) Net; 38.3 lbs. (17.4 kg) Shipping.
Specifications subject to change without notice.

文‧賴英智

U-Audio總編郭漢丞訪問Audio Research新任總裁Terry Dorn時，Terry說Audio Research是很保守的公司，由一群熱愛音響的人組成，多年來一直在明尼蘇達設計並製造器材，現在越來越多音響廠家，把生產轉往工資較低廉的地區，Audio Research卻從來沒這麼想過，Audio Research一直堅持美國設計、美國製造！從1970年William Johnson創立Audio Research，三十多年來儼然成為美國音響的中流砥柱。2008年這家公司由義大利私有資產Quadrivio SGR購併，Terry說新東家帶來更先進的管理技術，新的企業資源管理系統（ERP），提高了生產與經營的效率，William Johnson則進入半退休狀態，但是還是參與設計和技術指導，代表Audio Research的風格不會改變。

「維持對客戶的承諾，是非常重要的事。」Terry說：「十幾年前ARC遇到加拿大Sonic Frontier的強勢挑戰，號稱比ARC更進步的線路、更棒的聲音、更便宜的價格，很多美國經銷商都跟ARC反應『狼來了』。」但當時ARC卻是以不變應萬變，持續優質的售後服務。幾年後Sonic Frontier產品出現許多故障問題，消費者無法獲得原廠服務，不久Sonic Frontier也在市場上陣亡了。Terry認為這代表ARC堅持的「基本價值」，不僅對消費者有保障，也是公司能持續38年的關鍵。

讓消費者花的每一分錢都值得

除了周延而持續的售後服務，ARC還有其他的堅持，例如多年來他們發現真空管的聲音表現最好，頂級管機是所有器材的參考，所以ARC絕對不會放棄真空管機的生產。同樣的堅持呈現在產品細節上，Reference 3前級對ARC來說是個里程碑的設計，現在所有LS系列前級都是架構於Reference 3的線路，只是在某些地方較為簡化。但ARC一向不在零件品質上妥協，就算是最平價的產品，零件也與最高級機種並無二致。如果從最高價的產品一直聽到最平價者，你會驚訝地發現ARC產品的特色幾乎完全不變，僅有聲音的規模感和餘裕度不同。Terry強調，ARC最重視的就是音質表現，其他都是次要考量，所以ARC的器材外觀數十年如一日，他們寧可把錢都用在零件提升和線路改良上面，而不是打磨機箱。簡單的說，讓消費者花的每一分錢都值得（Good Value for the Money）才是ARC的核心價值。


焊接完成後，工作人員會把電路板拿到清洗槽，直接用壓縮噴霧的方式沖洗電路板。這種特殊鎔劑一加侖要價750元美金，而他們直接用噴灑的方式清洗電路板。[/td][/tr][/table]Audio Research從來都不是音響市場上最貴的器材，但在聲音表現上卻一直是最好的，這是Audio Research歷久不變的目標。看完郭總編對Terry Dorn的訪問片段之後，眼前這部長相不算太豪華的VSi60真空管綜合擴大機，也就讓人釋懷了，別忘了它是百分之百美國設計與美國製造的產品，它的樸實一如擺設裝潢都力求簡單清爽的ARC工廠，所以VSi60也才能用超乎想像的便宜價格賣給大家。中國已經成為世界最大規模的真空管機生產基地，內地用幾千元就能買到50瓦輸出的真空管綜合擴大機，但卻買不到同樣的堅持與追求完美的精神。在ARC工廠為了製作最乾淨的線路，特別購買了昂貴的特殊鎔劑，當焊接完成後，工作人員會把電路板拿到清洗槽，直接用壓縮噴霧的方式沖洗電路板。這種特殊鎔劑一加侖要價750元美金，而他們直接用噴灑的方式清洗電路板，夠奢侈了。

ARC所用真空管都要經過48小時連序工作，達穩定狀態後在拿去測試，所有的測試數據都會詳細紀錄，然後依據數值進行配對，由於淘汰到的廢管太多，所以ARC原廠管的價格要比別人都貴上一些。要維持長期的售後服務，必需存放大量的備用零件，所以在倉儲區幾乎有一半是留給零件，包括準備上線生產的新零件與後續服務的零件庫存。你知道嗎，就連20年前SP-11前級的面板，ARC都還有備料可供更換，所以即使買了VSi60這樣便宜綜合擴大機也不必擔心，10年之後它也不會「年老色衰」，Hi End音響就該是這個樣子。

图

有音量控制與訊源切換的真空管後級

入門款的VSi60是從VSi55改款而來，外觀上VSi60和VSi55幾乎一樣，但輸入級全部改過，VSi60把6N1P換上和參考系列一樣的6H30訊號管，而功率及使用Svetlana 6550依然不變。幾年前ARC推出以VS55真空管後級為藍本的VSi55綜合擴大機，也就是在VS55的放大電路前添加以繼電器切換的輸入端子，把後級的增益提升7dB，並加上音量控制晶片，成為一部「有音量控制與訊源切換」的真空管後級，並沒有真正的前級放大線路。

不過這種設計容易有「腳軟」的情況，碰上CD機的輸出電平較低，就會限制了動態起伏，所以VSi60在輸入級進行了改良，新的輸入級與ARCLS17前級有點相似，可以說是Hybrid混血設計，在輸入級JFET晶體，驅動及用了2只H30雙三極管來混合放大，電源供應則使用全晶體架構，好處是訊噪比會更好，動態也會更好。

LS17前級有極大的電平輸入承受能力，平衡輸入時可達24V，單端RCA最大12V，如此規格僅見於錄音室專業產品。ARC用意是讓任何高電平輸入都不會過荷，產生失真。在這樣的性能搭配下，前端訊源的增益輸出越大，音質聽起來就顯得更壯、更有力。VSi60的負迴授量，從VSi55的10dB降低為7dB，目的在提高輸出及的增益，但畢竟它沒有完整前級，因此我相信仍幫它找一部有較大輸出電平的CD機為佳。