Krell latc brochure
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Page 1
The Krell Lossless Acoustic Transducer (LAT) Series are the first loudspeakers engineered to Krells exacting standards. They are exceptional in their ability to provide accurate, high-powered reproduction without the distortions and informa- tion loss that occur in conventional loudspeaker designs. The Krell LAT Series fea- tures massive aluminum construction. (The LAT-1 weighs approximately 250 lb.) The enclosures range from 0.75 to 1.5 inches in wall thickness. Internal midrange/tweet- er sub-enclosures, where present, are also con- structed of aluminum at least 1/4-inch thick. The cross-sectional shape of the enclosure is deter- mined by a custom alu- minum extrusion, the curvature of which is designed to absolutely minimize the effects of internal standing waves and external high- frequency diffraction. Such extensive use of aluminum may seem extravagant, but the sonic benefits are undeniable. Other than concrete and lead, which are not prac- tical choices, aluminum possesses the ideal com- bination of structural rigidity and resonance damping characteristics. Within the audio pass- band, Krell LAT cabinets are sonically inert- something that cannot be said about any wood or wood derivative. There is nothing mystical about the design of the Krell Lossless Acoustic Transducer. The goal was to design a mathematically cor- rect loudspeaker that neither took any- thing away from nor added anything superfluous to the audio signal. Achieving that goal, nevertheless, took Krell down an engi- neering path never before traveled in the industry. The sound is pure Krell-as explosive, delicate, and imme- diate as music itself. And its exactly what youd expect of Krells first loud- speaker system. LAT-1 Lossless Acoustic Transducer Shown without grille. Available in black or silver. LATBro052102Final.gist 6/13/02 2:33 PM Page 2
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The development of the Krell Lossless Acoustic Transducer LAT-1 was, at once, necessitated and made possible by the Krell CAST™-Current Audio Signal Transmission-technology. The LAT-1 is uniquely capable of reproducing the pure, exceptionally high resolution, wide-bandwidth signal delivered by Krell CAST components. Separate crossover network assemblies are used for each driver complement (low, mid, and high). All circuitry is on 1/8-inch thick glass epoxy circuit boards with 4 oz. copper traces, ensuring low microphonics, low resis- tance, low inductance, and high current handling . 1st-order network at 300 Hz preserves transient response; 3rd-order Butterworth net- work at 2.9 kHz optimizes power response. Network inductors are all air-core pure copper designs, the largest of which is formed of 10-gauge wire, measuring 5 inches in diam- eter. Individually potted polypropylene WIMA capac- itors are used in parallel to minimize inductance and resistance, and improve current handling . System impedance curve is extremely smooth, and sen- sitivity is a high 91 dB SPL at 1 meter with 1 W input. Custom gold-plated brass binding post terminals assure optimum signal transfer. 1-inch (25 mm) tweeter delivers flat response to 50 kHz. Central wave- guide optimizes dispersion character- istics. 5 3/4-inch (15 cm) midrange features an advanced multifaceted cone that eliminates colorations induced by res- onance modes. A proprietary suspen- sion and extended voice coil assure extremely linear performance. DAppolito midrange/tweeter configu- ration places the acoustic center at ear level and ensures pinpoint- accurate stereo imaging . Custom-designed 8-inch (21 cm) woofer has extremely low free air res- onance, a composite carbon fiber cone, and a butyl surround. The long- excursion design (1-inch peak to peak) is optimized for vented cabinet performance. Both the midrange and woofer employ cast magnesium-aluminum frames and are video shielded. LATBro052102Final.gist 6/13/02 2:33 PM Page 3