本帖最后由 重庆小瑞音响 于 2017-2-11 00:01 编辑
Definitive Technology 源自1990年，承諾建立優越家庭音響及家庭影院擴音器。公司由 Sandy Gross、Don Givogue 和 Ed Blais 三位終身對音響設計、聲學和宣傳的音響發燒專家創立。Definitive Technology 的擴音器，不但獲得市場上肯定及好評，其優質家庭擴音器更成為美國最暢銷的優質家庭擴音器。
除此之外，Definitive Technology 的產品由開始已屢獲殊榮。由消費者電子行業以至各大主導音響/影像雜誌和網站颁发的獎項數目多不勝數。
Sandy Gross是一位有着40年专业经验的音响工程师，从上世纪七十年代初与其他创始者开创了著名音响品牌Polkaudio(普乐之声)后，Sandy Gross成为了业界的名人；到九十年代初，Sandy Gross先生又与另一位专业人士Don Givogue先生（同样具有扎实创作技术和业界丰富经验的音响工程师）合作创立了Definitive Technology，显示了Sandy Gross的技术实力和开阔创新的精神理念。
Definitive Technology最出名的就是獨家專利內建主動式超低音的雙極式揚聲器(Bipolar Loudspeaker)設計， 並致力於高品質的訴求，甫一上市馬上就得到全世界各地專業音響評論員的一致好評，並陸續得到許多大獎肯定，其中還包括連續兩年當選國家最頂尖的揚聲器製造商(Nation’s Top Loudspeaker Manufacturer)及美國政府官方授權擁有「高表現揚聲器領先者(The Leader in High-Performance Loudspeakers)」的殊榮。
SANDY GROSS是音响界的常青树，其研发的音响产品四十多年来在国外获奖无数
 Optimum surround sound home theater reproduction places heavy demands on the center channel speaker, which in many respects is the main speaker in the system and often handles 50% or more of the program material. It is no place to compromise and settle for second best. All Definitive center channel series models are designed with the same rigid standards and high performance goals as main left and right front speakers and feature wide frequency response and extended dynamic range with extraordinary detail and articulation.
Non-Resonant, Low-Diffraction Cabinets Maintain Sonic Purity
The resonant vibration of a loudspeaker's cabinet walls and baffles can also impart coloration. The tri-chambered monocoque cabinets of all Definitive L/C/R center channel models are constructed of extremely thick, dense medite with foam damping pads and extensive internal bracing. This virtually eliminates cabinet vibrations and resonance which would otherwise interfere with the pure sound produced by Definitive's high-definition drivers.
Definitive's High-Definition Die-Cast Basket Drivers are an Engineering Marvel
The C/L/R2002 features Definitive-developed magnetically shielded high-definition cast-basket bass/midrange drivers for significant performance advantages in the areas of robust bass reproduction, lifelike midrange clarity and dynamic range. These sophisticated drivers are engineering marvels which incorporate deeply drawn mineral-filled polymer cones, combined with butyl rubber dust caps and surrounds, high temperature vented voice coils and massive magnet structures. This combination of features assures high definition, superb transient response, high efficiency, high power handling and extended linear response. In addition, the aerodynamically designed, non-resonant, cast-magnesium baskets minimize reflections of the sound radiating from the back of the cones and preserve structural and magnetic integrity.
Definitive's Moving-Coil Pure Aluminum Dome Tweeters
The accuracy of high frequency reproduction really sets apart a great loudspeaker. The magnetic fluid-cooled moving-coil pure aluminum dome tweeters Definitive developed for the bipolar SuperTowers are of a unique design that synergistically brings together the performance advantages of metal domes (greater clarity) and soft domes (smoother sound and better dampening) in one state-of-the-art tweeter design.
The pure aluminum dome is specially annealed (to "relax" the crystal structure) and acoustically loaded by a precisely configured acoustic phase plug/lens (to assure perfectly controlled, absolutely linear movement). The tweeter's voice coil sits in ferro-magnetic colloidal fluid which serves to cool the voice coil for exceptional power handling and also damps the system for smoother response and sonic accuracy. In addition, the unique silk surround provides better dampening and wave termination. The audible benefits of all this highly advanced engineering include velvety smooth extended high frequency response (beyond 30 kHz), greatly reduced distortion, improved transient response, notably higher definition and crystal clear life-like clarity.
Phase-Coherent Crossovers for Perfect Driver Blending
The crossover network of a loudspeaker is the real heart of the system. It is like the conductor of an orchestra, telling each driver exactly when to come in and precisely how loudly to play. Here Definitive's talented engineers really work their magic, perfectly blending the sound of the various drivers into a sonically seamless, musically and cinematically coherent whole. Our complex and sophisticated Linkwitz-Riley designs, which utilize the finest components, are masterpieces of electrical engineering. They are differential crossovers which equalize the front and rear drivers separately for both linear frequency and phase response of their summed output. Also included are advanced technology Zobel Networks which provide a more stable load for your amplifier. This makes the speaker easier to drive, which results in smooth, more natural sound. The result is a symphony of sonic perfection that completely preserves the phase coherence, transient response and dynamic integrity of the original signal.
Driver Complement
Tweeter
Quantity1
Diameter1" (2.54cm)
TypePure Aluminum Dome
Midrange
Quantity2
Diameter5 1/4" (13.34cm)
TypeCast Basket bass/midrange drivers Electrical
Maximum Sensitivity
Center91 dB
Total Frequency Response
Center30 Hz - 30 kHz
Nominal Impedance
Center8 ohm
Crossover
A/V Receiver Crossover Setting60 Hz
Power Handling20 - 250 watts per channelDimensions
Cabinet Dimensions
Height6 3/4" (17.14cm)
Width21" (53.34cm)
Depth12" (30.48cm)
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