LCT 840

reference class TUBE microfone

LEWITT's LCT 840 is a premium-class externally polarized dual-diaphragm tube microphone designed to excel in a variety of demanding applications. Equipped with a precision-engineered 1-inch capsule, the LCT 840 stands for exceptionally warm and classic, solid vintage sound. Perfectly suited for miking vocals and instruments, this rugged multi-purpose mic allows for highly nuanced and authentic sound reproduction in the studio and even on stage. Five switchable polar patterns – omni-directional, cardioid, figure-8, wide-cardioid and super-cardioid – make the LCT 840 a highly versatile tool for professional audio engineers and performers looking for true and authentic tube sound. Like all LEWITT mics, the LCT 840 stands out for its extremely low self-noise level of 9 dB and effective rejection of off-axis sounds. The microphone features two levels of attenuation and two switchable low-cut frequencies, LEDs and pushbuttons for noiseless handling on the power supply unit (PSU). Apart from user-friendly operating controls and advanced technological features so essential to memorable recordings, the LCT 840 also makes an eye-catching design statement: The mic is equipped with a plexiglass inspection window on the front side of the body, so the illuminated tube itself is fully exposed. The inside window surface is coated with a highly conductive, yet transparent film preventing electromagnetic interference. In short: The unique combination of innovative design, high-end technology and tube-typical sound quality ensures magic takes.

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Key features

High-precision 1-inch capsule combined with a dual triode tube ensures beautifully detailed, smooth, warm and airy tube sound
Wide dynamic range of 130 dB-A and extremely low self-noise of 9 dB-A
Five directional characteristics – cardioid, omni-directional, figure-8, broad-cardioid and super-cardioid – offer maximum flexibility
User-friendly jog-dial for selecting the desired polar pattern
Solid die-cast body with a stylish, specially coated inspection window for optimal protection against electromagnetic interference
Noiseless pushbuttons for attenuation and HPF selection
Key-lock, clipping history and automatic attenuation
Illuminated user interface for quick and easy handling
Comes in an elegant black aluminium case with foam layers; includes PSU 840 power supply unit with full-metal housing and milled, anodized black aluminium front, LCT 40 SHxx shock mount, LCT 40 Tr audio cable with gold-plated 11-pin XLR connectors to connect microphone to the PSU, LCT 40 Wxx windscreen, User Manual, Poster, Warranty Card, Sticker
Top applications Demanding studio applications, Vocals, Acoustic instruments


Acoustical operating principle pressure gradient transducer, externally polarized
Transducer Ø 25,4mm (1 inch)
Directional pattern omni, broad-cardioid ,cardioid ,super-cardioid , figure-8
Directional pattern selectable on remote control
Frequency range 20 … 20.000 Hz
Sensitivity 23 mV / Pa (-33 dBV), cardioid -- 20 mV / Pa (-34 dBV), omni -- 23 mV / Pa (-33 dBV), figure-8
Signal/noise ratio 85 dB-A
Equivalent noise level (IEC 61672-1)9 dB-A, cardioid // 10 dB-A, omni (IEC 61672-1) // 9 dB-A, figure-8 (IEC 61672-1)
Dynamic range of mic. amp. 130 dB-A
Max. SPL for 0.5 % THD 139 dB, (0 dB Pre-attenuation ), 149 dB (10 dB Pre-attenuation), 159 dB (20 dB Pre-attenuation)
Pre-attenuation pad 10 dB / 20 dB ,selectable on remote control
Bass cut filter slope 12 dB ( octave at 40 Hz), 6 dB (octave at 300 Hz )
Rated impedance < 200 ohms
Rated load impedance > 1.000 ohms
Supply voltage custom power supply unit 230V/50 Hz - 110V/60 Hz
Current consumption 170 mA
Connector gold plated 11-pin XLR
Cable 8 m (26 ft) 11-pin audio cable oxygen-free copper
Dimensions (Mic) 192 x 60 x 46 mm (7,5 x 2,.4 x 1,8 inch)
Dimensions (PSU) 250 x 150 x 70 mm (9,8 x 5,9 x 2,8 inch )
Net weight (Mic) 662 g (23,3 oz) Net weight (PSU) : 1894 g (66,8 oz)

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