• Established in 1958

  • Free standard delivery over £199

  • Need help call 0207 636 1481

Lewitt LCT840 Dual-Diaphragm Tube Microphone

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.

Lewitt  LCT840 Dual-Diaphragm Tube Microphone


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 microphone 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 of 9 dB and effective rejection of off-axis sounds. The microphone features three levels of attenuation and three switchable high-pass filters, 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 microphone 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.


  • Ultra-thin 1-inch externally biased, gold-layered low-mass diaphragms combined with a dual triode tube ensures accurate transient response while providing smooth, warm and airy tube sound
  • Five consistent directional characteristics – cardioid, omnidirectional, figure-8, broad cardioid and supercardioid – offer maximum flexibility
  • Superior dynamic range of 130 dB-A (Tube) and extremely low self-noise of 9 dB-A for ear-catching realism and distortion-free sonic depth
  • 3-position switchable pre-attenuation pad (0 dB, 10 dB, and 20 dB) for handling extremely high sound pressure levels and 3-position high-pass filter
  • Illuminated user interface and jog dials for easy handling even in dark environments
  • Noiseless pushbuttons for quick and easy attenuation and HPF selection
  • Unique features like clipping history and automatic attenuation provide error-free studio recording and unparalleled ease of use
  • Solid die-cast metal body with a stylish, oversized tube inspection window specially coated for maximum protection against electromagnetic interference
  • Custom PSU 840 power supply unit with sturdy full-metal housing and brushed, anodized black aluminum front
  • Extra-large hexagonal ruthenium-galvanized steel mesh grille provides an open acoustic environment and prevents unwanted internal reflections
  • Corrosion-resistant gold-plated 3-pin XLR output connector
  • Comes in a black case; includes PSU 840 power supply unit, LCT 40 SHxx shock mount, LCT 40 Tr audio cable with gold-plated 11-pin XLR connectors and LCT 40 Wxx windscreen
  • Top applications

  • Lead and background vocals
  • Acoustic instruments // piano, guitar, drums, percussion, strings...
  • Wind instruments // brass and woodwinds...
  • Demanding studio applications
  • Details

    SKU LCT840
    Brand Lewitt
    Acoustical Operating Principle Pressure gradient transducer, externally polarized
    Directional Pattern Omni, Broad-cardioid, Cardioid, Super-cardioid, Figure-8, Selectable on remote control
    Transducer Ø 25.4 mm / 1 inch
    Frequency Range 20 to 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 (FET) 86 dB-A
    Signal / Noise Ratio (Tube) 85 dB-A
    Equivalent Noise Level (FET) 9 dB-A, cardioid, 10 dB-A, omni (IEC 61672-1) & 9 dB-A, figure-8 (IEC 61672-1)
    Equivalent Noise Level (Tube) 9 dB-A, cardioid, 10 dB-A, omni (IEC 61672-1), 9 dB-A, figure-8 (IEC 61672-1)
    Dynamic Range of FET Mic. Amp 130 dB-A
    Max SPL for 0.5 % THD (FET) 139 dB, 0 dB Pre-attenuation, 149 dB, 10 dB Pre-attenuation & 159 dB, 20 dB Pre-attenuation
    Max SPL for 0.5% THD (Tube) 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, 230 V, 50 Hz, 110 V, 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


    How much is delivery?
    At Ivor Mairants Musicentre we offer thousands of products that are currently in stock and can be delivered to your home address, anywhere in mainland UK. You will be able to see your delivery charge at the "Checkout" page.

    Do you offer Next Day Delivery?
    Yes, we offer a Next Day Delivery service for in-stock orders placed before 1pm Monday-Friday. Next Day Delivery and Saturday Delivery carries an extra charge. Ivor Mairants Musicentre commit to delivering on time, we rely however, on our carriers to fulfil their contract in this regard, and can not be held liable for any failure of third parties in fulfilling delivery expectations.

    Can I change my delivery address after I have placed my order?
    Once you have placed your order with us, we are unable to change any of the information you have given us, as most orders are dispatched from our distribution warehouse. Our contract carriers however offer various levels of free of charge enhanced service such as DPD PREDICT, which allows the consignee to be alerted by e-mail and/or text message of the delivery window and allows for changes allowed by the contract carrier to the detail of the actual delivery time and/or location. Where such services are available all orders will benefit from auto enrolment in the services. Ultimately, if there is no-one to sign for your delivery, you will be left a card by our contract carrier inviting you to collect from the depot or re-arrange delivery.

    If it proves impossible to deliver your goods within the time allowed by our contract carriers, the consignment will be returned to us and you will unfortunately become liable for all redelivery, and/or redirection charges. Please check your confirmation email for the status of your goods before contacting us. Should you need to change your details, for example you have moved house, you can change your details by contacting customer services on 0207 636 1481 or by email at info@ivormairants.co.uk and the new information will be updated within 24 hours. Please note that any orders placed before changes are made will use your old details.

    Can I track my order?
    The vast majority of our UK and Eire domestic consignments and international shipments are by trackable service. You will be emailed a tracking number with your dispatch information. Please note that tracking numbers are not used for smaller orders sent by Royal Mail or similar postal service. If you require your order to be consigned using a trackable service, please advise us AT THE POINT OF ORDER.


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