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3
4. About condenser microphones
4.1. The basic principle of a condenser capsule
// A condenser capsule consists of a diaphragm, that is positioned in close proximity
to a solid metal plate hence forming a capacitor. This diaphragm is electrically
conductive.
// The lower the mass of the diaphragm, the more sensitive it is to changes in
sound pressure. In an audible frequency range, we can perceive these changes of
sound pressure, and commonly refer to them as sound.
// Sound waves hit the diaphragm, making it moving back and forth. As the
capacitance changes according to the rhythm of incidental sound waves,
the electronics transform the change in capacitance into alternating voltage
- mechanical waves are converted into an electrical signal.
// Although the induced voltage is relatively high and could, in theory, be audible
on your headphones, the signal breaks down in an instant due to the internal
impedance of the capsule. An impedance converter and other electronics like an
internal amplier are used to process the induced voltage so that it can be safely
transmitted to following equipment.
// The condenser microphone has to be supplied with external power to generate
polarization voltage for the capsule and to power the internal electronics. This
external power source is commonly known as “Phantom Power”. (Microphones
with permanently polarized condenser capsules still need phantom power to make
the internal electronics work.)
1. Introduction
Thank you for choosing a LEWITT product! In this operating manual, you can
learn more about your LEWITT microphone and its proper usage. We have put all
our knowledge and passion for audio technology into building microphones for
people, whose standards for work and performance are as high as our own.
2. Box contents
// LCT 240 PRO - Condenser microphone
// DTP 40 Mts - Mic mount with 5/8" thread and 3/8" adapter
// LCT 40 Wx - Windscreen
// DTP 40 Lb - Leatherette transport bag
3. Features / Top applications
The LCT 240 PRO is an extremely versatile cardioid condenser microphone
designed for everyone who’s eager to take the next step in professional recording.
Equipped with a high-performance condenser capsule it enables clean, modern,
and detailed recordings. To accomplish an intimate and direct sound, especially
on vocals, we have added a boost on the airy frequencies.
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