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LEWITT LCT 540 S
Photo: LEWITT, from its quick guide, p. 1.

LEWITT

LEWITT LCT 540 S

Large-diaphragm condenser (1 inch, externally polarised), cardioid only, with push-button low cut and pad

Type
Condenser
Pattern
Cardioid
Sensitivity
−28 dBV/Pa
Self-noise
4 dB(A)
Max SPL
136 dB SPL
Impedance
68 Ω
Rated range
20 – 20k Hz

Frequency response

Angle
Distance

Frequency response: from the manual, p. 11. "Figure 9.1 - Frequency response of the LCT 540 S"; relative dB, with the three low-cut settings. Distance and smoothing not stated; the specifications say the microphones are measured according to IEC 60268-4.

Dashed: outside the rated range, or simulated (other angles and distances). Hover or tap the graphs for values.

Polar pattern

Polar pattern: from the manual, p. 11. "Figure 9.2 - Polar patterns of the LCT 540 S"; eight frequencies, 125 Hz to 16 kHz; rings labelled "0" and "-10", 5 dB apart. Low-cut setting not stated.

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All specs

From the manual
Capsule1 inch (25.4 mm), 3 micron gold-sputtered Mylar diaphragm. "Transducer Ø 25. 4 mm, 1 in"; "Diaphragm 3 micron gold sputtered Mylar".p. 12
Sensitivity−28 dBV/Pa (41 mV/Pa). "41 mV/Pa, -28 dBV/Pa" (20·log10(0.041) = -27.7).
Self-noise4 dB(A), per IEC 60268-1. "Equivalent noise level 4 dB (A)"; the product page calls it "Self-noise".
Max SPL136 dB SPL, 0.5% THD, 0 dB pre-attenuation. "Max. SPL for 0.5 % THD 136 dBSPL, 0 dB pre-attenuation". No figure is given with the pad.
Signal-to-noise ratio90 dB, A-weighted. "Signal / noise ratio 90 dB (A)".
Dynamic range132 dB, A-weighted. "Dynamic range 132 dB (A)".
Output impedance68 ohm. "Internal impedance 68 Ω".
Poweringphantom 48 V ± 4 V (IEC 61938). "Supply voltage 48 V +/- 4 V".
Current draw3.6 mA. "Current consumption 3. 6 mA".
ConnectorXLR-3 male, gold-plated. "Gold plated 3-pin XLR".
Weight371 g, net. "371 g, 13. 1 oz".
Dimensions158 × 52 × 36 mm. "158 x 52 x 36 mm"; presumably height × width × depth.
Supplied accessoriesLCT 40 SH shock mount (5/8" thread, 3/8" adapter); LCT 50 PSx magnetic pop filter; LCT 40 Wx windscreen; DTP 40 Lb leatherette transport bag. "Box contents". Page 12 also describes a "military-grade protective case".p. 3
Acoustic principlePressure gradient transducerp. 12
EnclosureZinc die cast
Display and buttonsIlluminated status, low-cut and pad indicators; key-lock, Clipping History and Automatic Attenuation (pad set automatically when clipping occurs, for test runs)p. 4
From the product page
Rated frequency range20 Hz to 20 kHz. "Frequency range 20 ... 20,000 Hz"; not in the manual's table. Tolerance not stated.p. 1
Low cutoff, 80 Hz, 160 Hz; 6 dB/octave; high-pass. "Low-cut filter: linear, 80 Hz (6 dB/oct), 160 Hz (6 dB/oct)"; chosen with the left push-button; the manual (p. 4) labels the positions "lin", "80 Hz", "160 Hz".
Pad−6 dB; also −12 dB. "Attenuation 0 dB, -6 dB, -12 dB"; chosen with the right push-button ("pre-attenuation", manual p. 4).
StandardsMeasured to IEC 60268-4; phantom power to IEC 61938; noise to IEC 60268-1
From the quick guide
Perfect MatchPolarisation voltage adjusted on every unit for the same sensitivity at 1 kHz, so any two can be pairedp. 1
FrontThe illuminated user interface faces the source

Documents

Copies kept by Mic Archive, because manufacturers move and drop their documents. Each is © LEWITT, unchanged, with its original address.

Product page on lewitt-audio.com

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