CCM 8

Compact Microphone

Features

  • pure pressure-gradient transducer
  • figure-8 pattern with near-ideal consistency across the frequency range
  • side-addressed (pickup perpendicular to the microphone body)
  • optimal for use in MS, Double MS and Blumlein stereo recording

This microphone can also be ordered as a modular Colette microphone, where the CMC 1 L amplifier is combined with an MK microphone capsule. (CMC 1 L + MK 8)
This variant allows the capsule to be exchanged and has advantages in terms of electrical properties in combination with digital wireless transmitters.


Order number

  • No. 121105 CCM 8 L (standard Lemo version)
  • No. 121106 CCM 8 K (fixed cable version with XLR)

Description

This capsule type is a true dipole (bidirectional) transducer, operating with a single diaphragm. Its main axis is at a right angle to the capsule, and is marked at 0° and 180° with a red and a black dot respectively.

The inherent qualities of a pure pressure-gradient transducer are readily observed in this capsule type:

  • Its sensitivity decreases at low frequencies.
  • The directional characteristic is extraordinarily independent of frequency.
  • Proximity effect is present.

The directivity index of a figure-8 pattern is the same as that of a...

This capsule type is a true dipole (bidirectional) transducer, operating with a single diaphragm. Its main axis is at a right angle to the capsule, and is marked at 0° and 180° with a red and a black dot respectively.

The inherent qualities of a pure pressure-gradient transducer are readily observed in this capsule type:

  • Its sensitivity decreases at low frequencies.
  • The directional characteristic is extraordinarily independent of frequency.
  • Proximity effect is present.

The directivity index of a figure-8 pattern is the same as that of a cardioid; if microphones with these two patterns are placed at the same distance from a sound source, a quantitatively similar balance of direct and reverberant sound would be picked up. In practice such a comparison would be deceptive, however, since a figure-8 does not respond to sound coming from the sides, from above or from beneath its main axis as does a cardioid. The figure-8 has a rear lobe equal in sensitivity to its front lobe, and this exactly makes up the quantitative difference – but in normally reverberant settings, the sound reaching a figure-8's rear lobe will be delayed and dispersed to a considerably greater extent than the reverberant sound energy which a cardioid picks up from its front and sides; the reflected sound will typically be subject to far more high frequency absorption as well. Thus the reverberant sound energy picked up by a figure-8, though theoretically equal in amount, is quite different in character from that which would be picked up by a cardioid in the same position.

The sound quality of the CCM/MK 8 is clear and neutral.

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Practice

When an MK 8 is used as a spot microphone, care must be taken to avoid picking up early reflections or unwanted direct sound from its rear, since sound arriving from the back is picked up with full level but reversed in polarity. This could result in partial cancellation of the intended sound, which can lead to comb-filter effects at higher frequencies.

When MS stereo recordings are made, the 0° axis normally faces to the left as viewed from behind the microphone setup. The “8“ engraved on the top of the housing should be aligned on its side so...

When an MK 8 is used as a spot microphone, care must be taken to avoid picking up early reflections or unwanted direct sound from its rear, since sound arriving from the back is picked up with full level but reversed in polarity. This could result in partial cancellation of the intended sound, which can lead to comb-filter effects at higher frequencies.

When MS stereo recordings are made, the 0° axis normally faces to the left as viewed from behind the microphone setup. The “8“ engraved on the top of the housing should be aligned on its side so as to appear horizontal, at a precise right angle to the Mid capsule. The microphone should be placed directly above or beneath the “M“ channel microphone, and as close to it as possible.

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Technical Specifications

Frequency range

40 Hz - 15 kHz

Sensitivity

-38,5 dB (V/Pa)

Maximum sound pressure level (THD < 0.5 %)

136 dB-SPL (P48)
128 dB-SPL (P12)

Maximum output voltage

2,6 V (8,3 dbV) with 2 kΩ load

Low cut filter

20 Hz, 12 dB/Okt

Output impedance

90 Ω @ 1 kHz

Maximum cable length

> 400 m

SCHOEPS RFI Shield

No

Powering standard / Valid range

P48 / >40 V
P12 / >10 V

Current consumption

4 mA (P48)
3,6 mA (P12)

Common mode rejection ratio (at 1 kHz)

> 55 dB

Minimum recommended load impedance

2 kΩ

Output

Lemo (CCM-L) or XLR-3M (CCM-K),
analog, 1 channel

Length

58 mm

Diameter

20 mm

Weight

43 g

Surface finish

matte gray

Product History

  • 1994: Launch of the CCM, hybrid technology circuit. The capsule part is identical to the MK capsules from the beginning  
  • 2016: better RF filter to protect from interferences
  • 2017: Polarization voltage generator now with higher frequency above 200 kHz due to downpitching in sound design applications.

Graphics

Downloads

CCM

Compact Condenser Microphones

User guides, manuals

en

Variants & Options

  • No. 191701 "Matching of two microphone capsules including certificate": Although our normal production tolerances are very close, we can deliver specially matched compact microphone pairs.
  • No. 191102 custom color: other custom colors on request
  • Each CCM microphone is available as a standard version "L" with a Lemo plug and as a version "K" with a permanently attached 5 m cable and XLR-3M connector.

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