The Krell Lossless Acoustic Transducer (LAT) Series are the first loudspeakers engineered to Krell’s exacting standards. They are exceptional in their ability to provide accurate, high-powered reproduction without the distortions and information loss that occur in conventional loudspeaker designs.
The Krell LAT Series features 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/tweeter sub-enclosures, where present, are also constructed of aluminum at least 1/4-inch thick. The cross-sectional shape of the enclosure is determined by a custom aluminum 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 practical choices, aluminum possesses the ideal combination of structural rigidity and resonance damping characteristics. Within the audio passband, 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 correct loudspeaker that neither took anything away from nor added anything superfluous to the audio signal. Achieving that goal, nevertheless, took Krell down an engineering path never before travelled in the industry. The sound is pure Krell—as explosive, delicate, and immediate as music itself. And it’s exactly what you’d expect of Krell’s first loudspeaker system
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 resistance, low inductance, and high current handling. 1st-order network at 300 Hz preserves transient response; 3rd-order Butterworth network 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 diameter. Individually potted polypropylene WIMA capacitors are used in parallel to minimize inductance and resistance, and improve current handling. System impedance curve is extremely smooth, and sensitivity 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 waveguide optimizes dispersion characteristics.
53/4-inch (15 cm) midrange features an advanced multifaceted cone that eliminates colorations induced by resonance modes. A proprietary suspension and extended voice coil assure extremely linear performance. D’Appolito midrange/tweeter configuration 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 resonance, 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
Six-driver, three-way, floorstanding moving-coil loudspeaker.
Drive-units:
Three custom-built 8” woofers with carbon-fiber/paper composite cones
Two high-excursion 5.75” midrange units with multifaceted cone/dustcap assemblies
One 1” dual-concentric-ring tweeter with integral waveguide
Crossover Frequencies: 300 Hz, 2.9 kHz.
Crossover Type: first-order at 300Hz, third-order Butterworth network at 2.9kHz.
Frequency Response: 38 Hz-22,000 Hz, at 3 dB.
Sensitivity: 91 dB at 2.83V/1m.
Nominal Impedance: 4 Ω
Minimum Load Impedance: 3,9 Ω
Recommended Amplifier Power: 100 - 800 W.
Peak Output: 120 dB SPL
Technical Features: Solid aluminum enclosure varying in thickness from 0.75”–1.5” with non-parallel sides and rigid aluminum internal sub-enclosure for midrange-tweeter module
Cabinet: aluminum, 1-1.5" thick.
Finish: Available in either black or silver
Dimensions: (H x W x D) : 1387 x 356 x 318 mm (54.6" x 14" x 12.5")
Weight: 113.6kg (250 lbs)
Finishes: Black- or silver-anodized aluminum