This unit has some wear on the grill and a replacement clip. It has been tested and certified to be in excellent working condition.

The MD 421 is a well-known Sennheiser microphone of proven reliability and per­form­ance for many years now. Because of its excellent quality it is being used for al­most all kinds of applications. The broadcasting stations use it for radio and TV field work, the musician prefers it for stage work as well as the recording amateur for home and outdoor recordings. The studio cardioid micro­phone MD 421 features a wide frequency response from 30 to 17,000 Hz. Its high sensitivity and slight increase in response towards high frequencies are responsible for its brilliant sound. Each microphone is custom cali­brated and delivered with its own per­form­ance chart which may be com­pared with the published standard per­form­ance plot printed in this leaflet. Each individual frequency plot has to fall within the published limits of the standard per­form­ance curve. The cardioid direction­al characteristic of the MD 421 with its front-to-back ratio of approximately 18 dB is an important feature making the microphone suitable for use in sound rein­forcement systems and all situations where it has to be used near loudspeakers. To prevent hum pickup by mag­netic stray fields the IVID 421 is fitted with a compensa­tion coil.

MD421-U

The MD 421-U is provided with a 3-pin Cannon plug (XLR). It is, as the other two models, a low-impedance mic which is symmetrically wired. A roll-off filter is provided. Two versions of the MD 421-U are available: MD 421-U-4 with adapter for ⅜-inch threads and MD 421-U-5 with adapter for ⅝-inch x 27G threads. The MD 421 N and the MD 421-2 are available in light grey heavy-duty finish. The models MD 421-U-4 and MD 421-U-5 feature a matt-black housing.

Directional Properties

The MD 421 has a cardioid directional characteristic which means that the maximum insensitivity to unwant­ed sound sources is at about 180°. The directional index of the MD 421 at 1000 Hz and 180° is at least 18 dB. This means that sound from the rear with a frequency of 1000 Hz produces an 18 dB lower signal as sound of the same intensity reaching the microphone from the front. As can be seen from the polar diagram, the MD 421 should therefore be spoken into directly from the front.

Warranty

This item is sold without the Sound Pure 3-year warranty (used / B-stock / dealer-exempt). Coverage terms for items in this category live in Terms & Conditions, Section 27.

Returns

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