Schoeps CCM 4A 話筒麥克風批發零售 Schoeps話筒 Schoeps麥克風 德國Schoeps播音麥克風 高端話筒 播音話筒 新聞播音麥克風 央視播音話筒 會議話筒 會議麥克風 高端播音話筒 德國原裝進口話筒 高級演講話筒 頂級播音話筒 立體聲話筒 單雙立桿話筒
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Schoeps話筒 德國Schoeps話筒麥克風 CCM 4A 話筒 Schoeps麥克風 CCM4A
MK 4A，CCM 4A
近距離語言或音樂拾取
（小于250px）
心形模式
靈敏度降低
較大的低頻衰減
在某些環境使用心形話筒時，如歌唱家或主持人使用的手持式話筒，近講效應會變得非常明顯。此外，其輸出電平要比其它話筒高的多，這樣會加大 拾 音 距 離 或 改 換 動 態 類型 。 這 兩 種 特 性 都 不 是 我們想要的。因此 SCHOEPS提供了特殊版本的 M K 4 S/ CCM4S，即 MK4A 或C C M 4 A (“A” 意 為“ 衰減”)，它在低頻上有更強的滾降，并降低10dB的靈敏度。
這種話筒類型主要用于很近距離和高聲壓級拾音環境。
距離較遠時，它只能提供低輸 出 電 平 ， 導 致 信 噪 比 降低.
所有CCM話筒類型的技術指標：
供電： 12V ± 1V 或 48V ± 4V 幻像供電
電流損耗（自動切換）： P12：8mA，P48：4mA
源阻抗： 90 Ω
推薦最小負載阻抗： 600 Ω
低切頻率（－3dB）： 20Hz
U版本長度： 46mm－58mm，根據型號決定
L版本長度： 46mm－58mm不帶連接器
直徑： 20mm
不包括線纜的重量： U版本：33g，L版本：43g
表面拋光： 磨砂灰（g）或鎳（ni）
線纜（K 5 LU）標準長度： 5m
如果需要其它長度可單獨定制，但便攜盒所能容納的線纜最大長度為10m。
Schoeps CCM 4A LG Overview
The Schoeps CCM 4A LG Compact Cardoid Microphone for Close Pickup offers a strong low-frequency roll-off and 10 dB low sensitivity. This microphone is recommended for use exclusively in situations of very close pickup and high sound pressure levels. At greater distances, it would only deliver a low output level, resulting in an effective reduction in signal-to-noise ratio.
This compact microphone consists of 2 main components, an acoustic transducer (a capsule) and a microphone amplifier, which come together in the same body. The capsule is the component which converts sound waves into a varying electrical voltage. It determines the directionality and, for the most part, the sound quality of the microphone. The amplifier is the other main component, with the circuitry required to accept external powering, polarizes (charges) the capacitive capsule, obtains the audio signal from it, and converts that signal into one which is balanced and low-impedance. The circuitry of the microphone features a balanced, class-A output stage which does not use either coupling condensers or an output transformer. This leads to low output impedance, insensitivity to electrical interference, low distortion, and light weight.
This microphone has a bass roll-off filter with a low cut-off frequency of 20 Hz and a slope of 12 dB/oct. This frequency has been chosen to protect against perturbing, inaudible (infra-) sound that can be caused by ventilation systems, track vehicles, and wind. Although it is hardly noticeable, infrasound can cause strong audible distortions in the connected equipment when it leads to an overload. This would make it impossible to produce a recording that could be used. The audio range also only starts at around 20 Hz. Lower frequencies are only actually discernible at high levels which are only reproducible on few audio systems, and then quickly become unpleasant.
The CCM 4 A LG microphone is an electrically active component requiring operating current. It uses a standardized powering scheme known as phantom powering. Most recording equipment offers a 48V supply for such microphones. Some equipment, however, provides a 12V supply for phantom powering, or can readily be modified for such a supply. The CCM compact microphone can work with either voltage, switching its circuitry automatically to the corresponding mode of operation. It maintains the same level of performance in either mode while drawing only the necessary amount of current from the phantom supply.
Cardioid pattern
For pickup of speech or music at close range (under 3.9" (250px))
Reduced sensitivity
Considerable attenuation of low frequencies
True condensers that do not require electronic frequency response correction
Balanced, low-impedance output via removable 16.4' (5m) cable with Lemo to XLR-3M connectors
For universal use
Small and light
The Lemo disconnect allows for use of special accessories, some similar to active components of the Colette Series
Flat frequency response
Sound is extensively independent of directional pattern
Low noise and distortion
Runs on both 48 and 12V phantom powering
Can be used with very long cables (over 328' (100m))
Matte gray non-reflective surface finish
Schoeps CCM 4A LG Specs
Current Consumption With 12 V: 8 mA
With 48 V: 4 mA
Impedance 90 Ω
Load Impedance Minimum recommended: 600 Ω
Frequency Low-cut: 20 Hz
Frequency Range 80 Hz to 20 kHz
Sensitivity 13 mV/Pa
Equivalent Noise Level A-weighted: 14 dB-A
CCIR: 24 dB
Signal-to-Noise Ratio A-weighted: 80 dB-A
Maximum SPL 132 dB-SPL
Surface Finish Matte gray
Length Without Connector: 1.8 to 2.2" (46.0 to 58.0 mm)
Diameter 0.7" (20.0 mm)
Weight 1.5 oz (43.0 g)
