Lewitt LCT 550

The Lewitt LCT 550 is the first and only large-diaphragm studio microphone ever to achieve 0 dB (A) self-noise*. That makes it possible to capture even extremely weak signals with great precision and detail.

The Austrian-developed LCT 550 sets new standards in terms of more than just self-noise. A dynamic range of 140 dB (A) guarantees the best-possible results even in challenging settings. The three pre-attenuation levels (0 dB, -6 dB and -12 dB) increase maximum SPL to as high as 155 dB (A). The LCT 550 also offers a clipping history as well as an auto-attenuation mode that automatically switches to the next level of attenuation if the signal is too strong. For the elimination of structure-borne noise, there are two high-pass filters: 80Hz, 12dB/octave and 160Hz, 6dB/octave.

Manufacturing tolerances have been minimized thanks to highly precise calibration of the capsule and the electronics – which means that any two microphones from this series, set identically, will always form a matched pair at +/- 0 dB!

* 0dB-A electronics only, 3 dB (A) according to IEC 60268-1 due to Brownian motion (in simple terms: the sound caused by the movement of air molecules ...)

Features:

• A perfect match – highly precise calibration of capsule and electronics means that any two microphones from this series will always form a matched pair at +/- 0 dB
• Precise transient response thanks to the 3-micron-thin, gold-layered, low-mass, 1-inch Mylar diaphragm
• Extraordinary sensitivity: capture even extremely weak signals with great precision and detail
• Cardioid polar pattern for effective rear sound rejection
• 0 dB (A) self-noise from electronics and circuitry*
• 140 dB dynamic range Max. SPL of 155 dB (A)
• Immune to electromagnetic interference thanks to transformerless preamplifier circuitry
• Illuminated user interface for quick and easy handling in dark environments
• Noiseless pushbuttons for attenuation and low-cut selection
• Automatic Attenuation and Clipping History mode
• Rugged zinc die-cast body Internal shock mount for maximum reduction of structure borne noise
• Corrosion-resistant gold-plated 3-pin XLR output connector

Specifications:

• Acoustical operating principle: pressure gradient transducer, externally polarized
• Diaphragm: 3 micron gold sputtered Mylar
• Transducer Ø: 25.4 mm / 1 inch
• Polar pattern: cardioid
• Frequency range: 20 to 20,000 Hz
• Sensitivity: 36 mV / Pa (-29 dBV), +/- 0 dB @ 1 kHz
• Signal / noise ratio: 91 dB (A)
• Equivalent noise level: 0 dB (A) self-noise from electronics and circuitry
• Dynamic range of FET mic. Amp.: 140 dB (A)
• Max. SPL for 0,5 % THD: 143 dB, 0 dB pre-attenuation
• Pre-attenuation pad: 6 dB, 12 dB, switchable
• Low cut: 12 dB / octave at 80 Hz
• Rated impedance: < 150 ohms
• Rated load impedance: > 1.000 ohms
• Supply voltage: 48 V +/- 4 V
• Current consumption: 5.5 mA
• Enclosure: Zinc die cast
• Connector: gold plated 3-pin XLR
• Dimensions: 158 x 52 x 36 mm / 6.22 x 2.04 x 1.42 inch
• Net weight: 425 g / 14.9 oz