Hifi-Stereo-Review-1987-11.Pdf
Total Page:16
File Type:pdf, Size:1020Kb
5 27276 1IOTO-S**w********136.:Ast E220V 0T60A0062H38* 26trOit. HOS T600068 fTb2. osNer 614 a'Aea S NdNtiHD1113 lld*TT 006S 10113A 000M la /01111111 311IASIM01 AN eatact, ogki ,,,' __,- - -- - . / r, CHANGER CD PIONEER RECEIVER, NAD SPEAKERS, POLK TUNER, KARDON HARMAN TESTED: VEGA SUZANNE COMPOSERS OF CALENDAR TUNER A BUY TO HOW SEPARATES NEW THE Review$2.25 1987 NOVEMBER Stereo "Polk Builds State -of -the -ArtComponents:' Consistently Superior Technology Results in Dramatically Better Sounding Loudspeakers for You. IIIIatthew Polk's genius is multifaceted. Poll8 Exclusive Silver Coil In addition to breakthroughs like SDA technology which totally revo- Dome 7iveeter Technology lutionized the whole concept of stereo- This state-of-the-art transducer is the only phonic reproduction, it is also responsible tweeter in the world which utilizes a voice coil for the advanced and exclusive component wound with costly silver coated wire formore technology present in every Polk loud- extended frequency response. The extremely speaker which results in unequalled high light polyamide dome allows exeptionally definition musical sound quality. quick transient response while the inherently well damped material eliminates annoying High Definition Reproduction resonances. The small diameter diaphragm Polk loudspeakers are true high definition assures wide dispersion of high frequencies systems which reproduce sonic images with throughout your listening room. In addition, life -like clarity and detail, much like a high the huge magnet structure combined with the resolution camera captures a visual image low mass moving system results in vanishingly Tweeter voice coils are centered with exacting precision by a with all the subtle detail and focus intact. sophisticated machine designed and built by Polk Audio eng,neers low distortion, superb wave form accuracy When you listen to a pair of Polks, notice how and high efficiency. A specially contoured response. Additionally, they don't deteriorate non -resonant faceplate improves dispersion, you can hear each and every individual instru- over time as do foam surrounds. They incor- ment clearly and distinctly, even when there lowers diffraction and helps eliminatereso- porate high -temperature aluminum voice coilsnant distortion. are many instruments playing at the same which allow high power operation without time. This high resolution capability is in large burnout. Optimized Flux Density magnet struc- part due to the consistently excellent transient Polk Fluid Coupled tures are used for perfectly balanced opera- Subwoofers response of all the drivers as well as the tion assuring clearer, more highly defined, Most Polk home speakers utilize a fluid seamless blending achieved by the Isophase more musical sonic performance. - Crossover systems. coupled subwoofer system for tight, quick, The Polk Isophase Crossover deep, powerful and room -filling bassresponse. Polks Exclusive fl-ilaminate This system realizes the performance advan- The crossover network is the most impor- tages of both large and small diameter woofers Polymer Driver Technology tant component in a high quality loudspeaker at the same time. Small diameter woofers have These superb drivers are specifically engi- system. It is responsible for properly blending neered to cover the entire fundamental musi- the sound of the individual drivers together faster transient response, better midrange and dispersion. Large diameter bass drivers couple cal range with life -like clarity and minimal into the homogeneous sounds of individual better to your room and produce more bass. coloration. PQIk's exclusive trilaminate (3 instruments and voices. The crossover acts like The Polk Fluid Coupled Subwoofer System layer) polymer cone technology is responsiblethe "musical conductor" of the loudspeaker, excels in all these areas. It utilizes the low for a purity and naturalness of reproduction telling each driver just when to come in and frequency energy produced within the en- unapproachable by conventional drivers exactly how loud to play. The elaborate Polk closure by the small bass/midrange driver to which utilize paper, or simply vacuum formed Isophase Crossover Systems utilize huge cop- plastic cones. Polk's unique trilaminate poly- per coils and precision capacitors and resis- hydraulically energize the large diameter low resonance subwoofer below approximately 60 mer cone is made of three complimentary tors to assure the lowest possible harmonic, Hz. The result is remarkably clear, well-defined materials, each of which has unique perform- IM, and transient distortion with complex high low frequency reproduction, exhibiting excep- ance advantages all its own. One material is level musical signals. Close tolerance, ex- tional upper bass detail which extends very light and structurally strong, one is very tremely costly mylar and silver mica capacitors smoothly and seamlessly down through the stiff with a high speed of sonic wave trans- are used in many models to achieve even sub -bass and cleanly up into the midrange. mission, and one very effectively removes higher sonic definition. In addition, driver sonic colorations by efficiently damping the equalization is optimized by the sophisticated cone structure. The exceptional performance and complex circuitry, while isophase (phase gained when all three are combined together coherent) operation is maintained by careful could never be equalled by a simple one layercontrol of the various phase relationships in cone of any single material. Polk drivers utilizethe system. Many loudspeaker manufacturers costly butyl rubber surrounds for more accu- polk skimp on this critically important component rate cone movement and deeper. better bass because it is usually hidden from sight, but The Speaker Specialists Polk builds crossovers correctly so that our S601 Metro Drive, Baltimore. Md. 21210 speakers will sound better for you. Where to buy Polk Speakers? For your nearest dealer, see page 210. CIRCLE NO37 ON READER SERVICE CARD Polk Audio's dedication to quality is apparent in every &stain of design, constructionirand performance. "Matthew Polk Hasa Passion for Perfection!" Experience the Awesome Sonic Superiority of His New Signature Edition SDA 1C and SDA 2B. The genius of Matthew Polk has now signal (and speaker) meant to he heard by "Mindboggling, astounding, brought the designer styling, ad- both ears at once. However, the fundamental flabbergasting" MOFidelity Magazine vanced technology and superb sonic and basic concept of stereo is that a much Words alone cannot fully describe how performance of his award winning SDA more lifelike three-dimensional sound is much more lifelike SDA TRUE STEREO repro- Signature Reference Systems into the new achieved by having 2 different signals, each duction is. Reviewers, critical listeners and Signature Edition SDA 1C and SDA 2B. played back through a separate speaker and novices alike are overwhelmed by the magni- each meant to be heard by only one ear apiece tude of the sonic improvement achieved by "They truly represent a (L or R). So quite simply, a mono loudspeaker Polk's TRUE STEREO technology. You will hear breakthrough."Rolling Stone Magazineis designed to be heard by two ears at once a hugh sound stage which extends not only while true stereo loudspeakers should each Polk's critically acclaimed, 5 time Audio - beyond the speakers, but beyond the walls be heard by only one ear apiece (like head- Video Grand Prix Award winning SDA tech- of your listening room itself The lifelike phones). The revolutionary Polk SDAs are the nology is the most important fundamental ambience revealed by the SDAs makes it sound first TRUE STEREO speakers engineered to advance in loudspeaker technology since as though you have been transported to the accomplish this and fully realize the aston- stereo itself Listeners are amazed when they acoustic environment of the original sonic ishingly lifelike three-dimensional imaging ca- hear the huge, lifelike, three-dimensional event. Every instrument, vocalist and sound pabilities of the stereophonic sound medium. sonic image produced by Polk's SDA speakers. becomes tangible, distinct, alive and firmly The nation's top audio experts agree that Polk placed in its own natural spatial position. You SDA loudspeakers always sound better than "A stunning achievement" Australian Hi Piwill hear instruments, ambience and subtle conventional loudspeakers. Stereo Review Polk SDA Technology solves one of the musical nuances (normally masked by con- said, "Spectacular... the result is always better ventional speakers), revealed for your enjoy- than would be achieved by conventional greatest problems in stereo reproduction. When each ear hears both speakers and ment by the SDAs. This benefit is accurately speakers." High Fidelity said, "Astounding described by Julian Hirsch in Stereo Review, ...We have yet to hear any stereo program that signals, as occurs when you use conventional (Mono) speakers to listen in stereo, full stereo "...the sense of discovery experienced when doesn't benefit." Now all 5 SDAs incorporate playing an old favorite stereo record and many of the 3rd generation advances in SDA separation is lost. The undesirable signal reaching each ear from the "wrong" speaker hearing, quite literally, a new dimension in the technology pioneered in the Signature Edition sound is a most attractive bonus..." Records, SRS and SRS2 including full complement sub - is a form of acoustic distortion called inter- aural crosstalk, which confuses