Lewitt LCT 640 Manual de usuario

www.lewitt-audio.com

EMPHASIZE

THE

YOUR

GENUINE

SOUND. LCT 640

Thank you that you have opted for a LEWITT product. In this operating manual you will learn more about your LEWITT microphone, its handling

and its proper usage.

With the LCT Authentica Series, LEWITT introduces a new generation of highly versatile wired condenser microphones that all aim for setting

new benchmarks of technology, sound quality and user-friendliness in both professional studio recording and onstage use.

The microphones of the LCT Authentica Series stand for unaltered sound and innovative features: llluminated Settings, Noiseless Push

Buttons, Automatic Attenuation with Clip Detection and History all ensure error-free sonic perfection and peerless ease of use for today’s

demanding recording artists and engineers.

Day after day, be it for live acts, in home studios or in professional studio productions.

LEWITT wishes you a lot of fun and success with this product!

LCT 640 Introduction

The product

LCT 640

LEWITT’s LCT 640 is designed to raise the bar in its class of reference-quality large-diaphragm condenser microphones.

This Austrian-designed and engineered pro-mic delivers a smooth, unsurpassably rich and exceptionally nuanced

sound, and exhibits a remarkable set of qualities that enthuses even the most discerning users. The LCT 640 excels in a

variety of demanding studio applications and stands for unrivalled performance in miking lead and background vocals,

drums, percussion instruments, grand pianos, brass and woodwinds, classical music ensembles.

In addition to the standard omni-directional, cardioid and figure-8 polar patterns, the LCT 640 offers a wide-cardioid and

super-cardioid characteristic. It offers a dynamic range of 135 dB and stands out for its extremely low self-noise of 10 dB.

In combination with a 4-level high-pass filter and 4-level switchable pre-attenuation, the LCT 640 provides maximum

versatility in all recording situations. Automatic attenuation, key-lock, clipping history, push buttons and a light-up user

interface round off the features of this outstanding microphone.

Features

·Superior transient response from ultra-thin externally biased, gold-layered low-mass

diaphragms for ear-catching realism and authentic sound

·Flat frequency response for natural, authentic sound

·Five consistent directional characteristics – cardioid, omnidirectional, figure-8, broad

cardioid and supercardioid – for maximum flexibility in a wide variety of recording applications

·10 dB self-noise and max SPL of 145 dB for an impressive total dynamic range of 135 dB,

providing maximum acoustic presence and clarity

·4-position switchable pre-attenuation pad for handling extremely high sound pressure

levels and 4-position high-pass filter

·Illuminated user interface for quick and easy handling even in dark environments

·Noiseless pushbuttons for quick and easy attenuation and HPF selection

·Clipping history, automatic attenuation and key-lock provide error-free recording and

unparalleled ease of use

·Extra-large hexagonal ruthenium-galvanized steel mesh grille provides an open acoustic

environment and prevents unwanted internal reflections

·Immune to electromagnetic interference thanks to transformerless preamplifier circuitry

·Corrosion-resistant gold-plated 3-pin XLR output connector

Top applications

·Lead and background vocals

·Acoustic instruments // piano, guitar,

drums, percussion, strings...

·Overhead miking // drums, percussion...

·Ensembles // choral or orchestral

·Room ambiance pick-up // guitar amplifier,

drums...

·Wind instruments // brass and woodwinds...

·Demanding live and studio applications

LCT 640 Features / Top applications

Using the mic

LCT 640

User-interface

② Polar pattern indications

① Status indicator ③ Noiseless polar pattern push button

④ Attenuation indications

⑦ Noiseless high-pass

filter push button

⑤ Noiseless attenuation push button

⑥ High-pass filter indications

Status indicator ①

·The microphone is in normal working mode if the status indicator

is illuminated in white.

·The microphone is in key-lock mode if the status indicator is not

illuminated.

·The microphone experiences clipping due to high SPL if the

status indicator flashes in red.

·The microphone is in automatic attenuation mode if the status

indicator is illuminated in red.

·The microphone indicates the clipping history if the status

indicator flashes red and white in an alternating sequence.

Polar pattern indications ②

·The currently active polar pattern setting is illuminated.

Setting the polar pattern

·Five different directivity characteristics omnidirectional, broad

cardioid, cardioid, supercardioid, figure-8 can be set by briefly

pressing the polar pattern push button ③.

–

Setting an attenuation level

⑤

Attenuation levels can be set by briefly pressing the attenuation

push button . Settings are: off, -6 dB, -12 dB and -18 dB.

Attenuation is used in extremely high SPL environments in order

to prevent clipping of the microphone, mixer and other audio

equipment.

Attenuation indications ④

·The currently active attenuation setting is illuminated.

High-pass filter indications ⑥

·The currently active high-pass setting is illuminated.

Setting a high-pass filter

·⑦High-pass filters can be set by briefly pressing the high-pass filter push button . Settings are: Off,

12 dB / octave at 40 Hz and 6 dB / octave at 150 and 300 Hz. High-pass filters eliminate unwanted

low frequency noise such as structure borne noise.

Automatic attenuation function

The microphone will automatically adjust to the next higher attenuation level if it experiences clipping due to a

high SPL. The microphone enters and leaves the automatic attenuation mode by constantly pressing the

attenuation push button ⑤ for more than 2 seconds. The microphone is set to automatic attenuation mode if

the status indicator ① is illuminated in red. Please note that the microphone will need 1/2 second to adjust to

the new attenuation level.

LCT 640 Using the mic

Using the mic

LCT 640

Key-lock function

The push buttons of the microphone can be locked and unlocked by constantly pressing the polar pattern push button ③ for more than 2

seconds.

Clipping history

Checking the clipping history lets you know if the microphone had experienced clipping in the past. The microphone displays the clipping

history after constantly pressing the high-pass push button ⑦ for more than 2 seconds. When in clipping history mode the status indicator ①

flashes red and white in an alternating sequence, the polar pattern indications ② as well as the high-pass indications ⑥ are not illuminated.

Clipping history mode provides information and works according to the rules listed below:

·The last manually set attenuation level is indicated by a constantly illuminated attenuation LED. If clipping has occurred in the past this

LED will flash.

·The clipping history information can only be accessed once. Clipping information will be deleted after leaving this mode by constantly

pressing the high-pass push button ⑦ for more than 2 seconds.

·Clipping history information will be deleted once you access the automatic attenuation mode.

·Clipping history information will not be deleted when unplugging the microphone.

LCT 640 Tech data

Tech graph Dimensions

158

Broad-cardioid

3 dB / unit

dB 1 V / Pa ref.

Cardoid

3 dB / unit

dB 1 V / Pa ref.

Figure-8

3 dB / unit

dB ref . 1 V / Pa

Super-cardioid

3 dB / unit

dB 1 V / Pa ref.

Omni

3 dB / unit

dB 1 V / Pa ref.

Tech data

·Acoustical operating principle:

·Transducer Ø:

·Directional pattern:

·Frequency range:

·Sensitivity:

·Signal / noise ratio:

·Equivalent noise level:

pressure gradient transducer,

externally polarized

25,4 mm

1 inch

omni

broad-cardioid

cardioid

super-cardioid

figure-8

20 ... 20.000 Hz

13 mV / Pa (-38 dBV), cardioid

10 mV / Pa (-40 dBV), omni

9 mV / Pa (-41 dBV), figure-8

84 dB-A

10 dB-A, cardioid (IEC 61672-1)

12 dB-A, omni (IEC 61672-1)

13 dB-A, figure-8 (IEC 61672-1)

·Dynamic range of mic. amp.:

·Max. SPL for 0,5 % THD:

·Pre-attenuation pad:

·Bass cut filter slope:

·Rated impedance:

·Rated load impedance:

·Supply voltage:

·Current consumption:

·Connector:

·Dimensions:

·Net weight:

135 dB-A

145 dB, 0 dB pre-attenuation

151 dB, 6 dB pre-attenuation

157 dB, 12 dB pre-attenuation

163 dB, 18 dB pre-attenuation

6 dB, 12 dB, 18 dB, switchable

12 dB / octave at 40 Hz

6 dB / octave at 150 Hz

6 dB / octave at 300 Hz

< 150 ohms

> 1.000 ohms

48 V +/- 4 V (IEC 61938)

5,5 mA (IEC 61938)

gold plated 3-pin XLR

158 x 52 x 36 mm

6,22 x 2,04 x 1,42 inch

430 g

15,2 oz.

LCT 640

Accessories

LCT 640

LCT 40 x W AIu case-LCT 40 SHx DTP 40 Lb

Accessories

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